JP2001124902A - Optical element, optical unit, molded parts provided with the optical element and manufacturing method therefor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a low-price optical element, capable of reducing the volume contraction of resin and double refractivity after molding and being simultaneously molded in a large amount with high quality, and to provide a method for manufacturing the optical element. SOLUTION: For this optical element, a thermosetting resin or photosetting resin material is filled in a die and then set and molded, while keeping a pressurized state. Also in this manufacturing method of the optical element, the thermosetting resin or photosetting resin material is filled in the die and then set and molded, while keeping the pressurized state.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical element, an optical unit, a molded article having an optical element, and a method of manufacturing the same.

[0002]

2. Description of the Related Art (1) A method for forming an optical element by molding a thermoplastic resin material, a thermosetting resin material, or a photocurable resin material is known.

[0003] For example, a molding process when an optical element is manufactured using a thermoplastic resin material will be described as follows. As shown in FIG. 20A, the molding material is melted by heating (step S11). Next, the molten molding material is transported in the direction of the mold (step S12). next,
A predetermined filling pressure is applied to the molten material, and the molding material is filled into a mold (step S13). Further, while the predetermined pressure is continuously applied to the molding material in the mold, the molding material is cooled and solidified (also referred to as solidification) (step S1).
4). This gives a molded article.

[0004] As shown in FIG. 21, an outline of a molding machine is a material supply section 93, a cylinder 94, a screw 95,
It has a heating unit 96, a mold 97, and a pressure unit 98. As described along the steps, the molding material is supplied from the material supply unit 93 and is melted by the heating unit 96 (a). Next, the molten molding material is conveyed by rotating the screw 95 in the cylinder 94 in the direction of the mold 97 (b). Next, one end of the screw 95 is pushed in the direction of the mold 97 by the pressurizing section 98 to apply a predetermined filling pressure to the melted material, and
7 (c). Further, the pressurized state is maintained at a predetermined pressurized pressure, and the liquid is cooled from the fluidized state and solidified (solidified) (d). Thereafter, it is taken out to obtain a molded product.

[0005] As shown in Fig. 22, the molded product 92 is integrally formed with four runners 92b extending radially from a sprue 92a, flow paths 92c respectively connected to the runners 92b, and an optical element 91.

Next, a molding process for manufacturing an optical element by using a thermosetting resin or a photocurable resin heat material will be described as follows. As shown in FIG.
A plurality of liquid molding materials are mixed (step S21).
Next, the mixed molding material is transported in the mold direction (step S22). Next, a predetermined filling pressure is applied to the mixed molding material, and the molding material is filled into a mold (step S23). Further, the predetermined filling pressure is released, and no pressure is applied. In addition,
In the case of a photocurable resin material, it is cured by irradiating light to chemically change (step S24). This gives a molded article.

[0007] (2) As an optical unit and a method of manufacturing the same, there is an optical unit in which another component is bonded to an optical element using a resin material. It is also known that there is a manufacturing method for making this optical unit.

[0008] (3) As an optical element and an optical unit and a method of manufacturing the same, an optical element and an optical unit which have been subjected to secondary processing such as an antireflection coating on the surface of the optical element are also known.

[0009] Furthermore, (4) a molded product in which an optical element or an optical unit can be placed on a flat portion is also known as a molded product.

[0010]

However, the problems of the optical element and the method of manufacturing the optical element according to the above (1) are as follows.
When molding using a thermoplastic resin material, a large compression pressure is required when filling the molding material in a molten state into the mold, and when the molding material is filled into the mold, internal distortion is generated in the molding material. Easy to occur. Therefore, it becomes difficult to manufacture many optical elements at once. Also, when molding using a thermosetting resin or a photo-curing resin material, after the material is flowed and filled in the mold, the pressurized state is released, and the material is cured in the mold at normal pressure. Therefore, there is a problem that the volume shrinkage of the molded optical element is large and birefringence or the like is easily generated.

Another problem of the optical unit and the method of manufacturing the optical unit according to the above (2) is that when an optical element formed by using a thermoplastic resin material and another member are bonded to each other to form an optical unit, An optical element using a resin material has a low hardness, so that the bonding force cannot be increased so much that there is a problem that it is difficult to form a good bonding layer.

Further, as the subject of the optical element and the optical unit subjected to the secondary processing described in the above (3) and the method of manufacturing the same, when the secondary processing is performed after the molding using the thermoplastic resin material, the thermal processing after the molding is performed. , There is a problem that the hardness of the coating cannot be increased because the antireflection coating cannot be deposited by setting the temperature of the optical element to a very high temperature.

Further, as a problem of the molded product described in the above (4) and a method of manufacturing the molded product, there is a problem that a molded product having an optical unit is liable to scratch or stain the optical surface of the optical element.

The present invention has been made in view of the above-described problems. That is, an object of the first invention is to use a thermosetting resin or a photocurable resin as a molding material, fill the molding material into a mold, and then perform molding while maintaining a pressurized state. It is an object of the present invention to provide a low-cost optical element with high quality, high productivity, and low cost.

A second object of the present invention is to provide a high-quality, high-productivity, low-cost optical unit and a method of manufacturing the same by combining the optical element described in the first object with other members. To provide.

Another object of the third invention is to provide a high quality, high productivity, low cost optical element or optical unit and a method of manufacturing the same by performing secondary processing after the molding processing. .

A fourth object of the present invention is to provide the above-mentioned first and second aspects.
A third object of the present invention is to provide a molded article having a shape in which the optical surfaces of the optical element and the optical unit are hardly damaged or stained, and a method of manufacturing the same.

[0018]

The above object can be achieved by any of the following means. (1) An optical element characterized by being molded by filling a mold with a thermosetting resin or a photocurable resin material, and then curing while maintaining a pressurized state.

(2) Two or more different types of thermosetting resin and / or photocurable resin material are filled in the same mold, then cured while maintaining a pressurized state to form a multilayer. Optical element.

(3) After filling a mold with a thermosetting resin or a photocurable resin material, the optical element molded by curing while maintaining a pressurized state is bonded to a fixed aperture part. Characteristic optical unit.

(4) In a flow path for feeding a thermosetting resin or a photocurable resin material, after filling the mold in which the portions where optical elements are formed are connected with each other with the material, the pressurized state is maintained. An optical element characterized by being molded while being cured.

(5) A slit-shaped flow path for feeding a thermosetting resin or a photocurable resin material is filled with a mold in which portions where optical elements are to be formed are connected to each other, and then pressurized. An optical element characterized in that it is cured and molded while holding the glass.

(6) After the thermosetting resin or the photocurable resin material is filled in the mold on which the molded article provided with the projection for protecting the optical surface of the optical element is formed, the pressurized state is maintained. A molded article having an optical element characterized by being cured and molded.

(7) A thermosetting mold is used to form a molded article provided with a fitting portion that enables stacking of molded articles having an optical element and a projection that protects the optical surface of the optical element. A molded article having an optical element, characterized in that after being filled with a thermosetting resin or a photocurable resin material, it is cured and molded while maintaining a pressurized state.

(8) A method for producing an optical element, comprising filling a mold with a thermosetting resin or a photocurable resin material, and curing and molding while maintaining a pressurized state.

(9) Two or more different types of thermosetting resin and / or photocurable resin material are filled in the same mold, and then cured while maintaining a pressurized state to form a multilayer. A method for manufacturing an optical element.

(10) A step of filling a mold with a thermosetting resin or a photocurable resin material, curing the mold while maintaining a pressurized state, and forming a first optical element; Filling a mold with a curable resin material, curing the mold while maintaining a pressurized state, and forming a second optical element; and bonding the first optical element and the second optical element together And a method for producing an optical unit.

(11) A step of filling a mold with a thermosetting resin or a photocurable resin material, curing the resin while maintaining a pressurized state, and molding an optical element, and laminating the optical element. A method of manufacturing an optical unit, comprising: a step of forming a member; and a step of bonding the optical element and the bonding member.

(12) After filling the mold in which the portions where the optical elements are to be formed are connected by a channel for feeding a thermosetting resin or a photocurable resin material with the material, the pressurized state is maintained. A method for producing an optical element, comprising curing and molding while curing.

(13) After filling a mold in which the portions where the optical elements are to be formed are connected by a slit-shaped flow path for feeding a thermosetting resin or a photocurable resin material with the material, the pressurized state is reduced. An optical element characterized by being cured and molded while being held.

(14) After filling a thermosetting resin or a photocurable resin material into a mold on which a molded product provided with a projection for preventing the optical surface formed on the optical element from coming into contact with a flat portion is formed. A molded article having an optical element, wherein the molded article is cured and molded while maintaining a pressurized state.

(15) A thermosetting resin or a thermosetting resin is formed in a mold in which a molded article having a fitting portion for stacking molded articles having an optical element and a projection for protecting an optical surface of the optical element is formed. A method for producing a molded article having an optical element, characterized in that after filling a photocurable resin material, the composition is cured and molded while maintaining a pressurized state.

The term "optical element" as used herein refers to an optical component used in an optical system or the like, for example, a photographing lens, an achromatic lens, a focusable lens, a zoom lens, a condenser lens, a relay lens, a beam expander, a Fresnel. Refers to a lens, a prism, a diffraction lens, a diffusion plate, a focusing plate, a reflection plate, a reflection mirror, a spectacle lens, and the like. In addition, an optical element in which an additional portion having an additional function is integrally formed at the same time is also referred to. The “added portion” is a portion to be added to the optical element, and refers to, for example, a lens frame, a coil bobbin, a light-blocking aperture, and the like. Further, the “optical unit” refers to a unit obtained by attaching another optical element or another component to the optical element and assembling the optical element into a unit.

[0034]

Embodiments of the present invention will be described below with reference to the drawings.

(First Embodiment) FIG. 1 is a configuration diagram of a molding machine for producing an optical element. In FIG. 1, A is a mixing section, B is a material supply section, C is a transport section, D is a heating section, E
Is a pressurizing section, F is a mold clamping section, G is a mold section, H is a mold heating section, and I is a decompression section. In addition, the embodiment has a molded product take-out section (not shown).

In the mixing section A, a thermosetting resin material or a photocurable resin material composed of a plurality of liquid resins is mixed by a mixer (not shown).

In the material supply section B, the mixed resin is supplied from the material supply means 51 to the molding machine.

In the transport section C, the motor 53 is driven to rotate the screw 54 in the cylinder 52, and the mixed resin is transported in the direction of the mold section G.

Further, in the heating section D, hot water or hot oil is circulated and heated in order to prevent stagnation and hardening of the molding material.

In the pressurizing section E, the molding material is compressed, the mixed resin is filled in a mold, and the pressurized state is maintained. Compressed air is sent from a pressurizing device 55 to a cylinder 56, and a rear end 54 of a screw 54 in the cylinder 56 is supplied.
By pressing a, the screw 54 is moved in the direction of the mold part G, and a filling pressure is applied to the mixed resin to fill the mixed resin. Most of thermosetting resin and photo-setting resin have about 9800000N
The resin mixed at a filling pressure of not more than / m ² is filled into the cavity in the mold.

Thereafter, curing is performed while maintaining the pressurized state. Here, “curing while holding the pressurized state” means that after filling the molding material into a mold, the molding material is cured by a chemical change in a state where pressure is applied. Later volume shrinkage can be reduced. When the volume shrinkage is small, for example, distortion of the optical surface formed on the optical element can be reduced. In addition, since the pressure of the molding material is made uniform in the cavity, birefringence hardly occurs. Further, for example, the aspherical shape formed on the surface of the cavity can be accurately transferred to the aspherical shape of the molded optical element.

When the molding material is filled, the resin slightly flows into the air vent 46 formed in the mold portion G. However, since the resin is extremely thin, the area receiving heat from the mold is large compared to the volume. Is cured to the resin itself and air vent 46
To prevent resin runoff.

In the clamping portion F, there is a movable platen 59b movable along a guide pin 59c with respect to a fixed platen 59a fixed to the molding machine. Mold clamping device 59
By d, the movable platen 59b is moved in the direction of the fixed platen 59a and pressurized to clamp the mold.

The mold part G is fixed to the fixed side mounting plate 4.
1, fixed mold 43, movable-side mounting plate 42 and movable mold 4
4. The fixed mounting plate 41 and the fixed mold 43 are fixed to the fixed platen 59a, respectively, and the movable mounting plate 42 and the movable mold 44 are fixed to the movable platen 59b. The fixed mold 43 and the movable mold 44 form a cavity where the molded product 31 is formed. Further, the movable mold 44 has a vacuum evacuation groove 4.
7 and an O-ring 45 provided around the parting surface. The parting surface refers to a surface where the movable mold 44 and the fixed mold 43 are separated. When the movable mold 44 and the fixed mold 43 are sealed with the O-ring 45, the evacuation can be performed efficiently. The fixed die 43 has a sprue portion 43a for pouring a molding material. The air vent 46 efficiently expels the air in the cavity and prevents generation of residual air bubbles. In addition,
The cavities in the fixed mold 43 and the movable mold 44 are subjected to electroless nickel plating, and this layer is diamond-turned. In the case where a photocurable resin material is used, a light guide portion for curing the photocurable resin is provided in a mold, and for example, the cavity is made of transparent glass to guide the light.

In the mold heating section H, the heating temperature is usually set to the thermosetting temperature of the thermosetting resin of 150 ° C. to 180 ° C. for heating. The curing temperature is about 150 ° C. to 220 ° C., depending on the type of the resin. If the temperature is set close to the thermosetting temperature of the resin at the time of filling the resin, since the resin that has started to pass through the air vent 46 is very thin, heat is efficiently obtained from the mold and the curing proceeds rapidly, thereby blocking the flow path by itself. In addition, even when pressure is applied, unnecessary resin is prevented from flowing outside.

In the pressure reducing section I, the pressure in the cavity is reduced immediately before filling the cavity with the resin. The pressure is reduced by the suction by the pressure reducing device 58, passes through the evacuation groove 47, passes through the air vent 46, and depressurizes the inside of the cavity. This reduced pressure can also reduce gas bubbles generated by the chemical reaction of the resin. The depressurizing force for depressurizing the inside of the mold is 0 hPa or more, 90
0 hPa or less is preferable. If the pressure is too low, the solvent component having a low vapor pressure is successively bubbled, so that the decompression force is preferably 200 hPa or more and 800 hPa or less. When a thin molded product or higher accuracy is required, the cavity can be set to a low pressure with a vacuum pump or the like.
Resin filling is performed quickly. If the pressure is reduced to this level, a simple one using compressed air of about 5 atm may be used.

Further, in the molded product take-out section, the molded product is protruded by a knock pin or an ejector pin (not shown) and released from the mold. Thereafter, the molded product is taken out by suction or scissors. In the case of a thermosetting resin having good mold release properties, such as a silicone resin, the mold may be subjected to vibration and released from the mold.

Here, a flow of a manufacturing process using a thermosetting resin or a photocurable resin material will be described with reference to FIG. First, the case where a thermosetting resin material is used is as follows.

1) First, the liquid resin is mixed by a mixer and supplied from the material supply means 51 to the molding machine.

2) The mold clamping device 59a is driven to move the movable mold 4
4 is moved in the direction of the fixed mold 43 and clamped at a predetermined pressure.

3) Suction is performed by the depressurizing device 58, passes through the evacuation groove 47, and depressurizes the cavity in the mold to a predetermined pressure.

4) The screw 54 is rotated to convey the mixed resin in the direction of the mold part G.

5) The pressing device 55 pushes the rear end 54a of the screw in the cylinder 56, and the screw 5
4 is moved in the direction of the mold portion G, and a predetermined filling pressure is applied to the mixed resin to fill the cavity in the mold.

6) After filling the mixed resin into the cavity, the molding resin is cured by a chemical change in the cavity while maintaining a pressurized state by applying a predetermined pressure.

7) The movable platen 59b is moved to the left in FIG. 1, and simultaneously, the movable mold 44 is moved in the same direction to open the mold portion G, and the molded product 31 is protruded by a knock pin (not shown). To the outside.

Next, when using a photocurable resin material,
It is the same as the above-described thermosetting resin, except that after filling the photocurable resin into the cavity, the resin is cured by irradiating the resin with ultraviolet light from the light guide portion of the mold while maintaining the pressurized state.

Here, the molding material used for the optical element will be described. The thermosetting resin refers to a synthetic resin that is cured when heated and molded, and includes a silicone resin, an epoxy resin, an acrylic resin, and the like. Examples thereof include UV1000, 2000, trade names manufactured by Mitsubishi Chemical Corporation. 3000, J
There are trade names such as Tesorite (trade name) manufactured by SR Corporation and MR-6, -8, and -10 (trade names) manufactured by Mitsui Chemicals, Inc. The photocurable resin is a synthetic resin that cures when exposed to light, and is a methacrylate-based material such as urethane, epoxy, or polyester, and has a material that slightly changes the molecular structure of the thermosetting resin material. . For example, JSR Corporation
Nippon Kayaku Co., Ltd., Kayarad, Mitsubishi Rayon Co., Ltd. MCR-10, Mitsui Chemicals, Inc. MR-
6, -8 and -10.

According to the above-described method for manufacturing an optical element, a high-quality optical element with little volume shrinkage or birefringence of the resin after molding can be manufactured.

The detailed effects of the method for manufacturing an optical element according to the present invention will be described with reference to the following (a) to (e).

(A) In the present invention, since the thermosetting resin or photocurable resin material used has good fluidity, it can be easily molded by a mold configured to form a large number of optical elements at once. . The mold area of the cavity per optical element can be reduced, and the cost can be reduced. Conventionally, for example, the runners are arranged concentrically and the portion where the optical element is formed is arranged at an equal distance from the sprue, so that the mold area of the cavity per optical element increases.

(B) In the present invention, the thermosetting resin or the photocurable resin material used has a small pressure loss before and after the flow path to the portion where the optical element is formed, and the clamping force of the molding machine is reduced. Small enough. In contrast, conventionally, when the thermoplastic resin material to be used is plasticized, it has viscoelastic properties, so that the mold clamping force increases.

(C) In the present invention, since the resin material used has good fluidity, it can be easily molded with a mold in which many optical elements are formed at once. As a result, the molding time per optical element can be shortened, the productivity is good, and the cost reduction can be expected. Conventionally, since molding pressure is large and it is difficult to form a large number of optical elements at once, the molding time per optical element tends to be long.

(D) In the present invention, since the amount of resin used in the runner and the sprue is small relative to the amount of resin to be filled in the portion where the optical element is formed, the amount of resin is small as a whole, and the cost is low. On the other hand, conventionally, the amount of resin used in the runner and the sprue is large and the loss is large.

(E) In the present invention, after filling a mold with a thermosetting resin or a photocurable resin material, the mold is cured and molded while maintaining a pressurized state, and a high-quality optical material with little volume shrinkage and birefringence is obtained. Obtain the element. On the other hand, conventionally, since the resin is cured at normal pressure, a large volume shrinkage of several percent to 10% occurs at the time of curing, and the shape of the optical element tends to change.

(Second Embodiment) FIG. 2 is a perspective view of an optical element according to the present invention. The optical element 11 has optical surfaces 11b on both sides, and a molded channel opening 11 on the outer edge 11c.
There is a. FIG. 3 is a plan view of a molded product obtained by simultaneously molding a plurality of optical elements. The molded product 31 is a sprue 31
The molding material is filled from a, and flows through each of the flow paths 31h.
This is obtained by molding zero optical elements 11 at the same time.

In the method for manufacturing the optical element 11, a flow path for flowing a resin material between a portion where the optical element 11 is formed and a portion where another optical element is formed is performed by the molding machine shown in FIG. There is a mold joined at 31h, and the mold is filled with a material, held at a predetermined pressurized state, cured in the mold, and molded. After the molding, the flow path 31h is cut.

As described above, a high-quality, high-productivity, low-cost optical element can be formed by one molding. In the conventional molding using a thermoplastic resin material, the cavity diameter of the cavity is about 640 mm, and the size of the mold is 840 m.
About 160t class is required for m-square molding machine. Considering only the production quantity, in the above-described example, one molding hardening time is 3 minutes and the molding cycle is about 3 minutes 15 seconds. With the conventional molding, the molding cycle is about 1 minute, and the cycle time appears to be disadvantageous by 3.25 times. However, the actual number of moldings in a production facility of the same scale is about 8 pieces. The invention becomes 12.5 times more advantageous.
Therefore, the tact time per optical element is shorter than the conventional molding by 3.8 times or more in the tact time.

In the molded article shown in FIG. 3, as a modified example, when the optical elements are continuously arranged in one line, the number of the flow path openings is reduced to two for one optical element.

(Third Embodiment) A molded product having another optical element is obtained by adding a sprue 31b shown by a dotted line to the molded product shown in FIG.

The mold used is provided with a sprue 31a and a sprue 31b which are part of a passage for transferring a molding material. In the manufacturing method, the molding materials are separately filled in a mold, held under pressure and cured.

As described above, especially when a large optical element or a large number of optical elements are simultaneously molded, insufficient filling of the molding material can be prevented and uniform molding can be performed.

(Fourth Embodiment) FIG. 4 is a perspective view of a molded article having another optical element. The molded product 32
Sprue 32g, 4 long dimension runners 322h, 4
Two short dimension runners 321h, each flow path 32a and 8
It consists of two optical elements 12.

The mold used is a long-sized runner 322.
h 4 optical elements and short runner 32
Since the four optical elements attached to 1h are alternately arranged circumferentially around the sprue 39d,
The external dimensions of the cavity on the parting surface of the mold can be reduced.

(Fifth Embodiment) FIG. 5 is a perspective view of a molded article having another optical element. The optical element 13 is a fine and small part, and a molded article 33 having the optical element is provided.
Is a slit-shaped flow path 33i through which resin flows between the sprue 33g and the optical element 13.

The manufacturing method is as follows. The resin material is filled into the cavity through the slit-shaped flow path 33i by the molding machine shown in FIG. 1, held in a predetermined pressurized state, and cured and molded in a mold. .

As described above, when a narrow band-shaped flow path is provided in each optical element, it is difficult to produce a mold having a narrow band-shaped flow path because of the fine optical element. Then, mold production becomes easy.

(Sixth Embodiment) FIG. 6 is a sectional view of another optical element. The optical element 14 includes an optical part 14 c having an optical surface 14 b used for an optical system and an optical part 1.
An additional part having a function different from that of 4c is integrally formed. An additional part is a mirror frame 14 for holding an optical element.
e. Reference numeral 14a is a flow path port.

The manufacturing method is the same as that of the fifth embodiment by using the forming machine shown in FIG.

As described above, an optical element having a simple structure and a lens frame can be manufactured.

(Seventh Embodiment) FIG. 7 is a sectional view of another optical element. The optical element 15 includes an optical part 15 c having an optical surface 15 a used for an optical system and an optical part 1.
5c is formed by integrally molding an additional portion having a function different from that of 5c. The additional portion is a bobbin 15f around which the coil 15j is wound.

The manufacturing method is the same as in the fifth embodiment, using the forming machine shown in FIG.

As described above, the optical element 15 with the bobbin
Is made of a thermosetting resin or a photocurable resin material, so that it has good heat resistance, is hardly deformed by heat generated by the coil, and has little change in optical dimensions with respect to temperature change.

(Eighth Embodiment) FIG. 8 is a perspective view of another optical element. The optical element 20 has a thin shape used for backlight illumination of a liquid crystal display panel, and the like.
The thickness is about 1 mm, and the vertical and horizontal dimensions are about 30 cm. In addition,
20a is a channel opening. Further, the surface of the optical element 20 has a plurality of triangular prism shapes that are fine and require precision. In the manufacturing method, molding is performed by a molding machine shown in FIG.

As described above, a thin shape with little volume shrinkage and birefringence can be manufactured. In particular, the shape of the cavity forming the triangular prism is transferred to the optical element with high accuracy. On the other hand, when molding with a conventional thermoplastic resin material, a high molding pressure is required, volume shrinkage and birefringence are large, and it is difficult to form a triangular prism shape.

(Ninth Embodiment) FIG. 10 is a perspective view of another optical element. The optical element 17 is a concave lens 1
71, a convex lens 172, and this boundary portion 17b
An optical surface that transmits or reflects light. In addition, 17a is a flow path port.

The manufacturing method is such that a part of the forming machine shown in FIG. 1 is replaced by a mechanism shown in FIG. The movable platen 59b is moved to the fixed platen 59a side, and the movable side mounting plate 42 and the movable mold 44 attached to the movable platen 59b are moved in the same direction. Then, the fixed mold 43 fixed to the fixed-side mounting plate 41 and the movable mold 44 are put together. Here, the pressure inside the cavity is reduced to a predetermined pressure by the pressure reducing device 58 shown in FIG. The resin for forming the concave lens 171 is conveyed in the direction of the mold 40a by rotating the screw 54A in the cylinder 52A. Further, the screw 54A is pushed toward the mold 40a to fill the cavity formed by the fixed mold 43 and the movable mold 44 with the resin material. Thereafter, the pressurized state is maintained and the mold 40a
(The fixed mold 4 above the center line Z in FIG. 9)
3, see movable mold 44).

Next, the movable mold 44 is moved
Rotate 0 degrees. The resin for the convex lens 172 is conveyed in the direction of the mold 40a by rotating the screw 54B, and the screw 54B is further pushed in the direction of the mold 40a so that the fixed mold 4
3 and the cavity of the movable mold 44 are filled with a resin material. Thereafter, it is cured while maintaining the pressurized state (see the movable mold 44 and the fixed mold 43 below the center line Z in FIG. 9).

As described above, since the influence of the temperature during molding is smaller than that of the thermoplastic resin material, a favorable optical surface can be obtained.
In addition, the movable mold 44, which is a part of the mold, is formed in two layers by switching the angle by 180 degrees, thereby simplifying the mold structure.

(Tenth Embodiment) FIG. 12 is a sectional view of an optical unit. FIG. 11 shows a schematic configuration diagram of a bonding apparatus. The optical unit 18 is obtained by bonding a first optical element 181 and a second optical element 182, and a bonding portion Q is an optical surface. 181a, 182
a is also an optical surface.

In the manufacturing method, in the first step, the resin material is
After filling in the mold shown in FIG. 1, the mold is cured while maintaining the pressurized state, and a molded article 381 having the first optical element 181 is molded. In the second step, after filling the resin material in the mold shown in FIG. 1, the resin material is cured while maintaining the pressurized state, and a molded article 382 having the second optical element 182 is molded. In the third step, the first optical element 18 is attached by the bonding apparatus shown in FIG.
The first and second optical elements 182 are bonded together. At first,
The molded product 382 is attached to the fixed side mounting plate 81 of the bonding apparatus.
Is set on the fixing jig 81a provided in the above. A photo-curable adhesive is applied to the bonding surface of the optical element 182 of the molded product 382. Further, the molded article 381 is bonded and applied to a movable jig 82 a provided on the movable side mounting plate 82 of the apparatus, and the molded article 381 is sucked and fixed by the vacuum device 85. Further, the movable-side mounting plate 82 is pressed from above to lower the movable-side mounting plate 82 along the guide pins 83. Thereafter, ultraviolet rays are irradiated from a light source 84 onto the photocurable adhesive to cause the bonding portion G to be bonded. Let it cure. In the fourth step, the molded article 3
The optical element 18 is separated from the molded product 38 obtained by laminating 81 and 382 with a laser beam machine shown in FIG.

Although the first and second optical elements use a thermosetting resin material in the embodiment, two or more different resins, for example, a thermosetting resin or a photo-setting resin material, or Alternatively, a thermosetting resin and a photocurable resin material may be used.

As a modification, the optical element may be bonded to a bonding member such as a fixed stop to form an optical unit.

As described above, since the thermosetting resin or the photocurable resin material has a higher hardness than the thermoplastic resin, the optical surface of the bonding portion Q is less deformed.

(Eleventh Embodiment) FIG. 14 is a perspective view of another optical element. FIG. 1 is a perspective view of a main part of a molded product.
FIG. 13 shows a configuration diagram of a vacuum deposition apparatus of a secondary processing machine. The optical element 16 is obtained by coating the optical surface 16b as a secondary process. In addition, 16a is a flow path port.

In the manufacturing method, in the first step, a molded article shown in FIG. 15 is produced using the molding machine shown in FIG. The molded article 36 has a rectangular outer frame 36f to be attached to the coating jig 62. In this outer frame 36f, a large number of optical elements 16 are connected to a flow path 36h so that a large number of coating processes can be performed at once. Are connected by In the second step, a vacuum evaporation apparatus shown in FIG. 13 is used. The molded product 36 is attached to the fixed coat jig 62. The inside of the container 65 is evacuated by the vacuum pump 61 to create a vacuum, and the molded product 36 is heated to about 150 ° C. by the heating source 66. In a vacuum, the evaporation material 63 is evaporated by the evaporation device 64, and the entire optical surface 16b of the optical element 16 is uniformly and collectively coated with the evaporation material.

The optical element may be coated with an anti-reflection coating, a coating for a reflecting mirror, a coating for a translucent mirror, a coating for shielding light, or the like.

As described above, since the resin material used has good heat resistance, the surface of the optical element to be coated is not easily deformed by heat. Further, since the heating temperature of the optical element can be increased, the coating treatment hardness can be increased. Further, since it is difficult to be deformed by heat, a good coated surface is obtained. Further, a coating process can be performed on a large number of optical elements at a time, thereby improving the processing efficiency. On the other hand, conventionally, when a thermoplastic resin material is used, the heat resistance is low and the heating temperature of the optical element cannot be increased so much that it is difficult to increase the coat hardness. Further, the coated surface is easily deformed by heat.

(Twelfth Embodiment) A manufacturing method of secondary processing for separating an optical element from a molded product will be described. FIG. 16 is a configuration diagram of a laser processing machine for secondary processing.
As shown in FIG. 16, the molded product 31 is set on the fixing jig 79. Then, the laser beam 71 is reflected by the mirror 72 using a carbon dioxide laser having a large continuous wave laser output, passes through the focusing lens 73, and is focused on the flow path 31h of the optical element using the material. At the same time, the gas passing through the pipe 78 is supplied from the nozzle 74 to the flow path 31 where the laser beam is applied.
h, the cut end is carbonized, and the blowing optical element 11 is cut.

As described above, when the optical element 11 using a thermosetting resin or a photocurable resin material is cut by a laser, the cut is carbonized and blown off, resulting in a smooth and clean cut. The optical surface 1 is heated by heat.
1b and the like are not deformed or internal stress is generated. In the conventional mechanical cutting, chips and cut edges are likely to be turned or chipped, optical performance is changed, and internal stress is easily generated.

(Thirteenth Embodiment) FIG. 17 shows a state in which a molded article having an optical element is placed on a plane portion, and FIG. 18 is a sectional view taken along the line AA of FIG. The molded article 39 is composed of a plurality of optical elements 19 and an outer frame 39d. Outer frame 39
In FIG. 18A, a projection 392d is provided on the lower side and a projection 391d is provided on the upper side in FIG.
9h. A protrusion 392d is provided on the outer frame 39d. The projection 392d is a projection for preventing the optical surface 19a from contacting the flat surface 87a. In order not to bring the optical surface into contact with the flat portion 87a, the molded product 39
A gap L is provided between the flat portion 87a and the closest position of the optical element 19. If the relationship between the protrusion 391d of the molded article 39 and the optical surface on the protrusion side is made the same, it is possible to prevent the optical surface from being damaged.

In the manufacturing method, molding is performed by a molding machine shown in FIG. As described above, the flat surface portion 87a serving as the mounting surface
The molded product does not come into contact with the optical element 19.

(Fourteenth Embodiment) FIG. 19 is a sectional view showing a state in which the molded products shown in FIG. 17 are stacked. The molded article 39 is composed of a plurality of optical elements 19 and an outer frame 39d. The outer frame 39d has a protruding portion 392d on the lower side and a protruding portion 391d on the upper side in FIG. 19, and the optical elements of a large number of optical elements 19 are connected to each other by a flow path 39h. Also, as shown in FIG.
A gap M is provided between the optical element 19 on the molded article 39 side and the optical element 19A on the molded article 39A side so that the optical surface of the optical element 19 does not come into contact with a nearby peripheral member when the 9A is superimposed. is there. Further, fitting portions g and f for overlapping are provided. The fitting portion f of the molded product 39 and the fitting portion fg of the molded product 39A are fitted and stacked. In FIG. 19, it is preferable that the optical element 19 does not come into contact even when the protrusion 391d side of the molded product 39A is placed on the lower molded product 39. In the manufacturing method, molding is performed by a molding machine shown in FIG.

As described above, it is possible to manufacture a molded article having a plurality of optical elements in which molded articles are overlapped without damaging the optical element.

[0104]

EXAMPLES Examples and comparative examples according to the present invention will now be described.

Example 1 An optical element of an example according to the present invention is made of a material having a trade name UV1000 of Mitsubishi Chemical Corporation and has a biconvex lens shape with an outer diameter of 4 mm. The manufacturing method used a molding machine shown in FIG. 1 and filled the molding material into a mold, and then cured while maintaining the pressurized state to mold. The number that can be molded simultaneously in one molding is 50, the mold temperature is 200 ° C., and the filling pressure for filling the material with the mold is 7840.
000 N / m ² , the holding pressure for keeping the material filled in the mold in a pressurized state was 117,600,000 N / m ² , and curing was performed in 3 minutes. When the shape of the optical surface of the molded optical element was measured with a contact-type shape measuring instrument, the shape error was 100 n.
m or less, and the surface roughness was 10 nm or less. The shape of the aspherical surface formed in the cavity was almost transferred to the surface of the molded optical element.

When the birefringence of the optical element was observed by the Senarmont method, it was found only several times in the flow path (gate), and the optical surface was almost zero. When the wavefront aberration was measured using an interferometer, the astigmatism was 25 mλrms.
It was a performance in a practical range.

Next, the optical element of the comparative example has the same lens shape as described above. A polyolefin-based thermoplastic resin was used as a material. The number of molds that can be molded at one time is eight, the mold temperature is 100 ° C., and the filling pressure is 392.
00000 N / m ² , the holding pressure for keeping the material filled in the mold in a pressurized state was 58800000 N / m ² , and the molding time was 60 seconds. The shape of the aspherical surface formed in the cavity was accurately transferred to the aspherical surface of the molded optical element, and was almost the same as the aspherical surface formed in the cavity. °, and ± 40 ° in the optical surface. When observing the wavefront aberration, the astigmatism was 20 mλrms due to birefringence.

Here, when comparing the embodiment and the comparative example, in the case of the embodiment, there is an advantage of 6.25 times in the number of optical elements that can be molded simultaneously at one time. Since the molding cycle time has a demerit of 1/3 times, the manufacturing method of the present invention according to the present invention has about twice as much advantages as the conventional molding method.
In addition, since the filling pressure and the holding pressure of this type of mold and molding machine are almost one order of magnitude smaller than those of conventional injection molding, they can be made very small and inexpensive, and birefringence is almost a problem in terms of quality. Disappears. As volume shrinkage is improved, the cost advantage of this method is greater.

Even when the holding pressure is at this level, the volume shrinkage of several percent to 10% that occurs when the resin is thermally cured can be canceled. This is because, due to the low viscosity of the resin, there is almost no pressure loss even through a narrow flow path, the holding pressure is effectively transmitted to the cavity, and the holding pressure acts hydrostatically. Even if a large number is formed by molding, the variation in the holding pressure in the cavity hardly occurs. Further, since the resin has fluidity until it is cured, no molecular orientation occurs at the time of filling the cavity. Also,
In thermosetting resins, mold temperature merely accelerates the polymerization reaction, and temperature fluctuations have almost no effect on the polymerization rate. Therefore, even if the temperature variation between the cavities was about 10 times or more as large as that in the case of molding using a thermoplastic resin, there was no difference in performance of the optical element between the cavities.

(Embodiment 2) Another embodiment according to the present invention will be described. This optical element is composed of two layers, a convex lens and a concave lens, and has an outer diameter of 10 mm. The materials used are UV1000 (refractive index nd = 1.638, Abbe number νd = 22.8) of Mitsubishi Chemical Corporation, which is a thermosetting resin, and M
Two types of Q type silicone resin (refractive index nd = 1.433, Abbe number νd = 53.4) were used. The material of the convex lens is trade name UV1000, and the material of the concave meniscus lens is MQ type silicone resin. The forming machine used was a two-layer forming machine shown in FIG. After the molding material was filled in a mold, it was cured and molded while maintaining the pressurized state. In the molding process, the convex lens was molded by the first molding, the mold was replaced while being left in the mold, and the concave meniscus lens was molded by the second molding. The conditions of the first molding are as follows: the mold temperature is 180 ° C., and the filling pressure is 7840000 N /.
m ² , the holding pressure for holding the material filled in the mold in a pressurized state is 11760000 N / m ² , and the curing time is 2 minutes (3 minutes for taking out). The conditions for the second molding are as follows:
Mold temperature is 180 ° C, filling pressure is 7840000 N / m
^{2. The} holding pressure is 14700000 N / m ² .

The optical surface of the molded optical element had a shape error of 200 nm or less for each surface, and there was no practical problem. Also,
Because of the thermosetting resin, the surface of the boundary portion during the second molding was good without being deformed. Observation of the birefringence by the Serelmon method showed that the optical surface was 10 ° or less, and the molding was performed without generating excessive internal stress. The eccentricity of the 50 molded lenses was good with an eccentric microscope of 3 minutes (angle) or less.

The optical element molded in two layers in this manner is
Since there is no adhesive or the like at the boundary, not only is optically ideal, but also the eccentricity between the two lenses is good because the molding is performed with high precision during molding with a mold. In this method, it is possible to confirm the quality of the optical performance of the lens immediately after joining after molding.

[0113]

According to the above configuration, the following effects can be obtained.

According to the first aspect of the present invention, the thermosetting resin or the photocurable resin material is filled into the mold and then cured and molded while maintaining the pressurized state. A high quality optical element with little shrinkage or birefringence is obtained. According to the sixteenth aspect, the optical element can be favorably manufactured.

According to the second aspect of the present invention, since the additional portion having the additional function is also integrally formed at the same time, the cost of the optical element is reduced. According to the seventeenth aspect, the optical element can be favorably manufactured.

According to the third aspect of the present invention, since the lens barrel or the bobbin is integrally formed, the cost of the optical element is reduced.

According to the fourth aspect of the present invention, two different
After filling the mold with more than one kind of thermosetting resin and / or photocurable resin material, it was cured and molded while holding the pressurized state. For example, an optical element in which the boundary surface of the resin is less deformed. According to the eighteenth aspect, the optical element can be favorably manufactured.

According to the fifth aspect of the present invention, a good optical surface is formed at the boundary of the multilayer. According to the twentieth aspect, the optical element can be favorably manufactured.

According to the sixth aspect of the present invention, after filling the mold with the thermosetting resin or the photocurable resin material, the mold is cured and molded while maintaining the pressurized state, and the fixed drawing part is attached. Since they are combined, in addition to the effect of the first aspect, an optical unit in which the fixed stop is fixed with a simple structure. According to the invention described in claim 24, the optical unit can be favorably manufactured.

According to the seventh aspect of the present invention, since the molding is performed using the molds connected by the flow path for feeding the material, the area of the cavity can be reduced. It becomes an optical element with good productivity. Claim 2
According to the invention described in Item 5, the optical element can be favorably manufactured.

According to the eighth aspect of the present invention, since at least the portion where the optical element is formed is molded by a mold arranged in a line, the flow of the molding material is good, and the molding material in the flow path portion is small. It becomes a useful optical element. According to the twenty-sixth aspect, the optical element can be favorably manufactured.

According to the ninth aspect of the present invention, the portions where the optical elements are to be formed are formed by a mold that is connected by a slit-shaped flow path for supplying a thermosetting resin or a photocurable resin material. Therefore, in addition to the effect of the first aspect, the optical element is particularly suitable for a small shape. According to the invention described in claim 27, the optical element can be favorably manufactured.

According to the tenth aspect of the present invention, since the length of the runner is arbitrary, the degree of freedom in cavity design is high, and the optical element can reduce the cavity area on the parting surface. According to the invention described in claim 28, the optical element can be manufactured favorably.

According to the eleventh aspect, particularly,
When the cavity area on the parting surface is large and the thickness is small, the optical element can improve the filling of the material.
According to the invention described in claim 29, the optical element can be manufactured favorably.

According to the twelfth aspect of the present invention, when a silicone resin is used as a molding material, an optical element having a particularly good mold separation can be obtained.

According to the thirteenth aspect of the present invention, the cured surface of the thermosetting resin or the photocurable resin material can be coated at a higher heating temperature than that of the thermoplastic resin. Thus, an optical element having good coat surface accuracy can be obtained. Further, according to the invention described in Item 31, the optical element can be favorably manufactured.

According to the fourteenth aspect of the present invention, the thermosetting resin or the photocurable resin material is molded into a mold for forming a molded product in which the optical element does not come into contact with the flat portion which is the mounting surface. Thus, a molded article having an optical element with less scratches, dirt, etc. on the optical surface of the optical element is obtained. According to the invention of claim 34, the molded article can be favorably manufactured.

According to the fifteenth aspect of the present invention, a thermosetting resin or a photocurable resin material is provided with a fitting portion for stacking molded articles having an optical element, and the optical element is externally provided. Since the optical element is molded using a mold that forms a molded article that does not come into contact with the optical element, the molded article is less likely to damage the optical element. According to the invention described in claim 35, the molded article can be manufactured as a good child.

According to the nineteenth aspect of the present invention, since a part of the mold can be switched to perform multi-layer molding, molding can be performed with one mold.

According to the twenty-first aspect of the present invention, parts having different shapes are filled in a mold using a thermosetting resin or a photocurable resin material, and then molded, and they are bonded to each other. Therefore, an optical unit having high quality with little volume shrinkage or birefringence of the resin after molding and strong bonding surface force can be favorably manufactured.

According to the invention of claim 22, since the bonding portion of the optical element of claim 21 has an optical surface,
A good optical surface with little deformation during bonding.

According to the twenty-third aspect of the present invention, after the thermosetting resin or the photocurable resin material is filled in the mold, the optical element and the bonding member which are cured and molded while maintaining the pressurized state are bonded to each other. Since the bonding is performed, an optical unit having a strong bonding surface force can be manufactured.

According to the thirtieth aspect, since different shapes are molded in the same mold, the cost is lower than using separate molds. In particular, since a thermosetting resin or a photocurable resin material is used, even if a molding material is filled in a cavity having a different shape, the material has good fluidity, and volume shrinkage and birefringence hardly occur.

According to the thirty-second aspect of the present invention, since the pressure in the cavity is reduced within a predetermined range, an optical element capable of filling a mold with a molding material can be manufactured.

According to the thirty-third aspect of the present invention, the flow path of an optical element formed of a thermosetting resin or a photo-curable resin material is satisfactorily cut by a laser. It is possible to manufacture an optical element with a small and clean cut surface.

[Brief description of the drawings]

FIG. 1 is a configuration diagram of a molding machine for manufacturing an optical element.

FIG. 2 is a perspective view of an optical element according to the present invention.

FIG. 3 is a plan view showing a molded product obtained by simultaneously molding a plurality of optical elements.

FIG. 4 is a perspective view showing a molded article having another optical element.

FIG. 5 is a perspective view showing a molded article having another optical element.

FIG. 6 is a sectional view of another optical element.

FIG. 7 is a sectional view of another optical element.

FIG. 8 is a perspective view showing another optical element.

9 is a configuration diagram of a part of the molding machine shown in FIG.

FIG. 10 is a perspective view of another optical element.

FIG. 11 is a schematic configuration diagram of a bonding device.

FIG. 12 is a sectional view of an optical unit.

FIG. 13 is a configuration diagram of a vacuum deposition apparatus of a secondary processing machine.

FIG. 14 is a perspective view of another optical element.

FIG. 15 is a perspective view of a main part of a molded product.

FIG. 16 is a configuration diagram of a laser processing machine for secondary processing.

FIG. 17 is a diagram showing a state in which a molded product having an optical element is placed on a flat surface.

18 is a sectional view taken along the line AA in FIG.

19 is a cross-sectional view showing a state in which the molded products shown in FIG. 17 are stacked.

FIG. 20 is an explanatory diagram of a molding step.

FIG. 21 is a schematic view of a molding machine.

FIG. 22 is a perspective view of a molded article having a conventional optical element.

[Explanation of symbols]

11, 12, 13, 14, 15, 16, 17, 19, 19 Optical element 18 Optical unit 31h, 32a, 33i, 36h, 39h Flow path 14e Lens frame 15f Bobbin 14b, 15a, 16b, 19a Optical surface 17b Boundary part 31, 32, 33, 36, 38, 39 Molded products 31a, 31b Sprue 322h, 321h Runner

Claims (35)

[Claims] 1. An optical element characterized in that a thermosetting resin or a photocurable resin material is filled in a mold and then cured and molded while maintaining a pressurized state. 2. The optical element according to claim 1, wherein an additional portion having an additional function is integrally formed at the same time. 3. The optical element according to claim 2, wherein the additional portion is a lens frame or a bobbin around which a coil is wound. 4. A method in which two or more different thermosetting resins and / or photocurable resin materials are filled in the same mold, then cured while maintaining a pressurized state to form a multilayer. Optical element. 5. The optical element according to claim 4, wherein the boundary of the multilayer is an optical surface that transmits or reflects light. 6. An optical element obtained by filling a mold with a thermosetting resin or a photocurable resin material, curing the molded element while maintaining a pressurized state, and bonding a fixed aperture component to the optical element. Optical unit. 7. A flow path for feeding a thermosetting resin or a photocurable resin material, after filling the mold in which portions where optical elements are formed are connected with each other with the material, and maintaining a pressurized state. An optical element characterized by being cured and molded. 8. The mold according to claim 7, wherein a portion where an optical element is formed is arranged in at least one row.
An optical element according to item 1. 9. A slit-shaped flow path for feeding a thermosetting resin or a photocurable resin material, and after filling the mold in which the portions where optical elements are formed are connected with each other with the material, the pressure state is reduced. An optical element characterized by being cured and molded while being held. 10. The mold according to claim 1, wherein a length of a runner formed from a sprue which is a part of a passage for transferring the material to a portion where each optical element is formed is set to an arbitrary length. The optical element according to any one of claims 1 to 5, or 7 to 9, wherein: 11. The mold has at least two sprues that are part of a passage for transferring a molding material,
The optical element according to any one of claims 1 to 5, or 7 to 10, wherein a molding material is filled into the mold from each of the sprues and the pressure is maintained in a pressurized state. 12. The optical element according to claim 1, wherein a molding material of the optical element is a silicone resin. 13. The optical element according to claim 1, wherein a surface of the optical element is coated. 14. A mold in which a molded article provided with a projection for protecting an optical surface of an optical element is filled with a thermosetting resin or a photocurable resin material, and then cured while maintaining a pressurized state. A molded article having an optical element characterized by being formed by molding. 15. A thermosetting mold for forming a molded article provided with a fitting portion that enables stacking of molded articles having an optical element and a projection that protects an optical surface of the optical element. A molded article having an optical element, characterized in that after being filled with a resin or a photocurable resin material, it is cured and molded while maintaining a pressurized state. 16. A method for producing an optical element, comprising: filling a mold with a thermosetting resin or a photocurable resin material, and curing and molding while maintaining a pressurized state. 17. The method for manufacturing an optical element according to claim 16, wherein an additional portion having an additional function is simultaneously formed integrally. 18. After filling two or more different thermosetting resins and / or photocurable resin materials into the same mold,
A method for producing an optical element, comprising: curing while maintaining a pressurized state to form a multilayer. 19. The method of manufacturing an optical element according to claim 18, wherein a part of a portion where the optical element is formed is switchable inside the mold. 20. The method according to claim 18, wherein the boundary of the multilayer is an optical surface that transmits or reflects light. 21. A step of filling a mold with a thermosetting resin or a photocurable resin material, curing the mold while maintaining a pressurized state, and molding a first optical element; Filling a mold with a conductive resin material, curing the resin while maintaining a pressurized state, and molding a second optical element, and bonding the first optical element and the second optical element together And a method for producing an optical unit. 22. The optical unit according to claim 21, wherein the bonding portion where the first optical element and the second optical element are bonded is an optical surface that transmits or reflects light. Manufacturing method. 23. A step of filling a mold with a thermosetting resin or a photocurable resin material, curing the same while maintaining a pressurized state, and forming an optical element, and a bonding member for bonding the optical element. And a step of bonding the optical element and the bonding member to each other. 24. The method according to claim 23, wherein the bonding member has a fixed stop function. 25. A mold in which portions where optical elements are formed are joined by a flow path for feeding a thermosetting resin or a photocurable resin material, and after filling the material, the mold is cured while maintaining a pressurized state. And manufacturing the optical element. 26. The method of manufacturing an optical element according to claim 25, wherein the mold has portions in which optical elements are formed arranged in at least one row. 27. A mold in which portions where optical elements are formed are connected by a slit-shaped flow path for feeding a thermosetting resin or a photocurable resin material, and after the material is filled, a pressurized state is maintained. An optical element characterized by being cured and molded while being cured. 28. The mold has a runner formed between a sprue that is a part of a passage for transferring the material and a part where each optical element is formed, and has a desired length. The method for manufacturing an optical element according to any one of claims 16 to 20, 25, and 26, wherein: 29. The mold has at least two sprues that are part of a passage for transferring a molding material,
The molding material is filled into the mold from each of the sprues, and the pressure is maintained in a pressurized state.
29. The method for manufacturing an optical element according to any one of 0, 25, 26, and 28. 30. The method of manufacturing an optical element according to claim 16, wherein optical elements having different shapes are simultaneously molded in the same mold. Method. 31. The optical element according to claim 16, wherein a surface of the optical element is coated.
31. The method for manufacturing an optical element according to any one of items 28 and 30. 32. The method according to claim 31, wherein the pressure in the cavity formed in the mold is reduced to 0 hPa or more and 900 hPa or less before filling the mold with the thermosetting resin or the photocurable resin material. 32. The method of manufacturing an optical element according to any one of Items 16 to 20, 25, 26, or 28 to 31. 33. The method according to claim 16, wherein the plurality of optical elements are simultaneously molded, and then each of the optical elements is cut by laser processing. A method for manufacturing an optical element. 34. A mold in which a molded product having a projection for preventing an optical surface formed on an optical element from being brought into contact with a flat portion is filled with a thermosetting resin or a photocurable resin material. A method for producing a molded article having an optical element, wherein the molded article is cured and molded while maintaining a pressurized state. 35. A thermosetting resin or a light-curing resin is formed in a mold in which a molded article having a fitting portion for stacking molded articles having an optical element and a projection for protecting an optical surface of the optical element is formed. A method for producing a molded article having an optical element, characterized in that after a curable resin material is filled, the molded article is cured and molded while maintaining a pressurized state.