JP2006018253A - Optical member and manufacturing method thereof - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the resolution by preventing the apparatus from becoming large.
[Solution]
An optical member that is disposed on the optical axis of the imaging lens 1 and corrects aberrations. A flat film 4 such as an IR cut filter disposed on the optical axis was provided with a correction film 5 set to an aspheric shape corresponding to the aberration to be corrected. The correction film was provided on the light receiving element side of the lens. The correction film 5 was formed of an ultraviolet curable resin. This ultraviolet curable resin is spread and applied to the outside of the functional surface, and is used as an adhesive for fixing the flat plate 4 to the barrel 6. The correction film 5 for correcting the aberration is formed by applying an ultraviolet curable resin to one surface of the flat plate material 4 and performing an ultraviolet irradiation process in a state where the pressing die 10 is pressed against the surface of the ultraviolet curable resin of the flat plate material 4. . Applying synthetic resin to a mold set to an aspherical shape according to the aberration to be corrected, and applying a curing process while pressing the synthetic resin on one or both sides of the flat plate 24, correct the aspherical shape accurately. Form the membrane.
[Selection] Figure 1

Description

  The present invention relates to an optical member incorporated in an imaging lens and the like, and a manufacturing method thereof, and more particularly to an optical member suitable for use in a small-sized optical apparatus having a small number of lenses, such as an imaging lens used in a mobile phone or the like. It relates to a manufacturing method.

  For example, in mobile phones, camera-equipped mobile phones to which an image transmission / reception function is added are rapidly spreading.

  A CCD element or a CMOS element is used for a camera incorporated in a mobile phone. When the number of pixels of these elements is 300,000 or more, a small and high resolution lens is required. For this reason, there is a demand for a small lens having various aberrations and good optical characteristics.

In order to realize this good optical characteristic, there is one constituted by one or two lenses. As examples of such lenses, those described in Patent Documents 1 and 2 are known.
JP 2001-296473 A JP 2004-4620 A

  However, in a configuration such as the conventional lens described above, it is difficult to efficiently correct all aberrations with the lens alone. For this reason, it is necessary to incorporate a lens for correcting aberrations, but if a new lens is incorporated for correcting aberrations, it will be bulky, so it is possible to realize a small number of lenses with a small size and good image quality. There is a problem that it is difficult.

  The present invention has been made in view of the above problems, and an object thereof is to provide an optical member capable of improving resolution while maintaining a small and thin state, and a method for manufacturing the same.

  In order to solve such a problem, an optical member according to a first invention is an optical member made of a flat plate that is disposed on an optical axis and performs a specific function, wherein one or both sides of the flat plate is attached to the optical member. An aspherical shape for correcting aberration of an optical system in which the member is incorporated is set.

  With the above configuration, for example, in the case of a flat plate material such as a filter already disposed on the optical axis, it is natural, but even in the case of a flat plate newly disposed on the optical axis, it is thinner than the lens. Therefore, it is not bulky. Various aberrations can be corrected by setting the surface of the transparent flat plate to an aspheric shape corresponding to the aberration to be corrected. As the surface of the flat plate material set to an aspheric shape corresponding to the aberration to be corrected, the flat plate material itself may be directly made into the above aspheric shape, or a film material may be attached to the flat plate material. Moreover, the surface made into the aspherical shape is one surface or both surfaces as required.

  An optical member according to a second invention is the optical member according to the first invention, wherein a correction film set to an aspherical shape corresponding to the correction target aberration is applied to one surface or both surfaces of the flat plate material. It is characterized by that.

  With the above configuration, the correction film formed on one or both surfaces of the flat plate material is set on the optical axis with a thickness of, for example, about several tens of microns and an aspheric shape corresponding to the correction target aberration. Thus, the aberration due to the other lens on the optical axis is corrected.

  An optical member according to a third invention is the optical member according to the second invention, wherein the correction film is molded from a synthetic resin, and the synthetic resin is applied to the flat plate material according to the correction target aberration. Further, it is spread and applied to the outside of the aspherical functional surface and functions as an adhesive for fixing the flat plate material.

  With the above configuration, the synthetic resin spread and applied to the outside of the functional surface adheres between the flat plate material and the barrel to which the flat plate material is attached, and fixes the space therebetween.

  An optical member according to a fourth invention is the optical member according to any one of the first to third inventions, wherein the flat plate material is an IR cut filter.

  With the above configuration, by applying a correction film using an IR cut filter as a transparent flat plate already provided on the optical axis, infrared rays are cut by the IR cut filter, and various aberrations are generated by the correction film. Correct.

  An optical member according to a fifth invention is the optical member according to any one of the first to fourth inventions, wherein the flat plate material is located inside a lens disposed on the optical axis. Features.

  With the above configuration, the flat plate material positioned inside the lens corrects the aberration at a position close to the light receiving element.

  An optical member according to a sixth invention is the optical member according to the fifth invention, wherein the flat plate material is located in the vicinity of the light receiving element inside the lens disposed on the optical axis. It is characterized by.

  With the above configuration, the flat plate material located in the vicinity of the light receiving element corrects the aberration at a position closer to the light receiving element.

  A method for manufacturing an optical member according to a seventh aspect of the present invention is a method for manufacturing an optical member that is disposed on the optical axis of an optical system and corrects aberrations of the optical system, and is disposed on the optical axis. A synthetic resin is applied to one or both sides of the flat plate material, and a curing process is performed in a state in which a pressing die set to an aspherical shape corresponding to the correction target aberration is pressed against the synthetic resin, so that a non-corresponding to the correction target aberration is obtained. A spherical correction film is formed.

  With the above configuration, the correction film along the curved surface of the pressing die can be accurately and easily formed.

  An optical member manufacturing method according to an eighth aspect of the present invention is an optical member manufacturing method that is disposed on the optical axis of an optical system and corrects aberrations of the optical system, and has an aspheric shape corresponding to the correction target aberration. Aspherical surface corresponding to the aberration to be corrected by applying a synthetic resin to the mold set to, and applying a curing process with the synthetic resin pressed onto one or both surfaces of the flat plate disposed on the optical axis. A shape correction film is formed.

  With the above configuration, the synthetic resin is cured while being applied to the surface of the mold set to an aspheric shape according to the aberration to be corrected, so the aspheric surface set until the synthetic resin is completely solidified. Maintained in shape.

  An optical member manufacturing method according to a ninth invention is the optical member manufacturing method according to the seventh or eighth invention, wherein the synthetic resin comprises a thermosetting resin, an ultraviolet curable resin, or a quick-drying resin. The curing treatment is characterized by comprising a heat treatment, an ultraviolet irradiation treatment or a drying treatment.

  With the above structure, the correction film can be formed in a short time by subjecting the synthetic resin to heat treatment, ultraviolet irradiation treatment, or drying treatment.

  As described above, according to the present invention, the following effects can be obtained.

(1) Various aberrations can be corrected by setting the surface of the flat plate to an aspherical shape corresponding to the correction target aberration, so that the optical device including the optical member can be kept small and thin. In addition, the resolution can be improved.

(2) By applying a correction film to the surface of the flat plate material, the surface of the flat plate material has an aspheric shape corresponding to the aberration to be corrected, so that an IR cut filter or a cover already disposed on the optical axis is used. An optical member can be easily molded even for a flat plate material.

  Furthermore, by applying a correction film to an existing IR cut filter or the like, an optical member can be molded at a low cost without increasing the number of parts. Further, since the optical member can be mounted without being bulky, a lens with good image quality can be realized in a state where the entire apparatus is kept downsized.

  In addition, when a flat plate material is newly provided, only one thin plate material is inserted, so that the overall size of the apparatus can be prevented and the optical member can be molded easily and at low cost in the same manner as described above. A lens with good image quality can be realized.

(3) The bonding process can be omitted by applying the synthetic resin that forms the correction film to the outside of the functional surface that corrects aberrations and applying it as an adhesive for fixing the flat plate. The manufacturing cost can be reduced.

(4) The correction film can be accurately and easily formed by applying a synthetic resin to the flat plate material and performing a curing process in a state where the pressing die is pressed against the surface of the flat plate material. Therefore, an optical member with high accuracy can be manufactured in a short time and at a low cost.

(5) Since a synthetic resin composed of a thermosetting resin, an ultraviolet curable resin or a quick-drying resin is cured by heat treatment, ultraviolet irradiation treatment or drying treatment, the optical member can be produced in a short time, and the production cost Can be reduced.

(6) Since the flat plate material is positioned inside the lens disposed on the optical axis and the aberration is corrected at a position close to the light receiving element, more accurate correction can be performed. At this time, more accurate correction can be performed by positioning the flat plate in the vicinity of the light receiving element.

(7) The synthetic resin is cured while being applied to the surface of the set aspheric shape mold, and is maintained in the set aspheric shape until the synthetic resin is completely hardened. Can be formed.

  Hereinafter, embodiments of an optical member and a method for manufacturing the same according to the present invention will be described in detail with reference to the drawings.

[First Embodiment]
The first embodiment of the present invention will be described below. FIG. 1 is a side sectional view showing an imaging lens according to the present embodiment. FIG. 2 is a schematic diagram for explaining a method for manufacturing an optical member according to the present embodiment.

  The imaging lens 1 according to the present embodiment is mainly composed of a lens portion 2 and an optical member 3.

  The lens unit 2 is a lens for focusing on a light receiving element (not shown) such as a CCD element. The lens unit 2 is formed by one aspherical convex lens or is formed by combining two lenses. The lens unit 2 is designed to obtain a good image quality. However, it is not easy to correct all aberrations with one or two lenses, and aberrations that cannot be corrected are generated.

  The optical member 3 is a member for correcting this aberration. The optical member 3 is composed of a flat plate material 4 and a correction film 5. The flat plate 4 uses an IR cut filter as a transparent flat plate already arranged on the optical axis. An IR cut coat is applied to the outer surface of the flat plate 4 to provide a filter function for cutting infrared rays. The optical member 3 also has a function as a cover for the lens unit 2.

  The correction film 5 is a film material for correcting aberration generated in the lens unit 2. The correction film 5 is integrally provided on the inner surface of the flat plate 4. The correction film 5 has a thickness of about 10 to 80 μm and is set to an aspheric shape corresponding to the aberration to be corrected. That is, the correction film 5 is normally aspherical and is appropriately set to have a surface shape corresponding to the correction target aberration. The correction film 5 is formed of an ultraviolet curable resin. Since this ultraviolet curable resin is in a liquid state before ultraviolet irradiation, the ultraviolet curable resin is applied to the inner surface of the flat plate 4. At this time, the ultraviolet curable resin is applied not only to the portion for forming the aspherical functional surface corresponding to the correction target aberration but also to the outside thereof.

  The lens unit 2 and the optical member 3 are attached to the barrel 6. The barrel 6 includes a cylindrical main body portion 7 and a support plate portion 8 that also serves as a diaphragm. The main body portion 7 is a member for attaching the lens portion 2 and the optical member 3 to a mobile phone or the like via a member such as a holder (not shown), and is arranged with a diaphragm 9 described later facing outward. . The lens unit 2 is supported in the main body unit 7. The support plate portion 8 is a plate member for covering the distal end portion of the main body portion 7 and forming the diaphragm 9. The diaphragm 9 is an opening for taking in light from outside and adjusting the light amount and the light diameter. A flat plate 4 is attached to the inside of the support plate portion 8. The flat plate 4 is fixed by the ultraviolet curable resin. That is, the ultraviolet curable resin spread and applied to the outside of the functional surface is also adhered between the flat plate 4 and the barrel 6 to which the flat plate 4 is attached, and functions as an adhesive. Is fixed.

  Next, the manufacturing method of the optical member 3 is demonstrated based on FIG.

  First, as a first step, the flat plate 4 is inserted into the barrel 6 and an ultraviolet curable resin is applied to the inner surface of the flat plate 4. At this time, the ultraviolet curable resin is applied in a wider range than the functional surface that functions as an optical member. Specifically, it is applied to such an extent that it protrudes from the flat plate material 4 and adheres to the main body 7 and the support plate 8 of the barrel 6. Alternatively, it is applied to such an extent that the ultraviolet curable resin protrudes when pressed by the pressing die 10 in the second step, which will be described later, to form a protruding portion 5A, and adheres to the main body portion 7 and the support plate portion 8 of the barrel 6 as well. .

  Next, a curing process is performed as a second step. Here, first, the pressing die 10 set to an aspherical shape corresponding to the correction target aberration is inserted into the barrel 6 and pressed against the surface of the flat plate 4. At this time, the pressing die 10 is set to an outer diameter that can be inserted into the barrel 6. Specifically, the barrel 6 is inserted into the barrel 6 in a state where the inner diameter of the barrel 6 and the outer diameter of the pressing die 10 are aligned and the positioning of the pressing die 10 on the optical axis is accurately performed. .

  In order to mold the ultraviolet curable resin into an aspherical shape corresponding to the correction target aberration, the pressing die 10 is formed in a shape in which the aspherical curved surface corresponding to the correction target aberration is reversed. Further, the pressing die 10 is formed of a material that transmits ultraviolet rays. In a state where the pressing die 10 is pressed against the surface of the flat plate member 4, ultraviolet rays are irradiated to perform a curing process. Thereby, the ultraviolet curable resin is cured in a short time, and the aspherical correction film 5 corresponding to the correction target aberration is formed. At the same time, the flat plate 4 is fixed to the barrel 6.

  Thereafter, the lens unit 2 is fixed to the barrel 6 and the assembly of the imaging lens 1 is completed. Next, the imaging lens 1 is incorporated into a main body such as a mobile phone through a holder or the like.

  In the imaging lens 1 configured as described above, since the correction film 5 is applied to the flat plate material 4 as the IR cut filter that is already disposed on the optical axis, the thickness of the existing lens or the like is substantially almost the same. An aberration correction function can be added without changing and without being bulky. Thereby, the resolution, distortion, etc. of the imaging lens 1 can be improved while maintaining the small and thin state of the optical device including the optical member.

  Further, when the lens unit 2 is constituted by a single lens, the lens unit 2 and the flat plate member 4 have three aspheric surfaces, compared to the case where the lens unit 2 is constituted by two lenses. The cost can be reduced, and the optical performance can be improved as compared with the case where the lens unit 2 is configured by a single lens. Since the number of parts is not increased, the optical member can be molded at a low cost.

  Since the ultraviolet curable resin is spread and applied to the outside of the functional surface and used as an adhesive for fixing the flat plate member 4, the bonding operation step can be omitted, and the manufacturing cost can be reduced. Usually, the dripping of the ultraviolet curable resin is a drawback, but by using this as a reverse hand, the bonding step can be omitted by using it as an adhesive. In addition, since many UV curable resins are applied so as to actively spill, it is possible to reliably prevent defects due to lack of liquid.

  By applying a UV curable resin to the flat plate material 4 and applying a curing treatment in a state where the pressing die 10 is pressed against the surface of the flat plate material 4 to form the correction film 5, according to the surface finish of the pressing die 10, The correction film 5 can be accurately and easily formed. For this reason, an accurate optical member can be manufactured easily and inexpensively in a short time by finishing the surface of the pressing die 10 accurately.

[Second Embodiment]
Next, a second embodiment of the present invention will be described. FIG. 3 is a side sectional view showing the imaging lens according to the present embodiment. FIG. 4 is a schematic diagram for explaining a method for manufacturing an optical member according to the present embodiment.

  The imaging lens 11 according to the present embodiment mainly includes a lens unit 12, an outer barrel 13, and an optical member 14.

  The lens unit 12 is a lens for focusing on a CCD element or the like (not shown). The lens portion 12 is formed by one aspherical concave lens. In addition, this lens part 12 is shape | molded by one lens similarly to the lens part 2 of 1st Embodiment mentioned above, or is shape | molded combining two lenses. The lens unit 12 is designed to obtain a good image quality. Aberrations that cannot be corrected by one or two lenses are corrected by the optical member 14.

  The outer barrel 13 is a member for supporting the lens unit 12 and the optical member 14. The outer barrel 13 includes a cylindrical main body portion 16 and a support plate portion 17.

  The main body portion 16 is a member for attaching the lens portion 12 and the optical member 14 to a mobile phone or the like via a member such as a holder (not shown), and is disposed with the support plate portion 17 facing outward. . The optical member 14 is accurately positioned and supported in the main body 16.

  The support plate portion 17 is a member attached to the distal end side (the upper side in FIG. 3) of the main body portion 16. The support plate portion 17 has a hole similar to that of the diaphragm 9 of the first embodiment, and is disposed so as to cover the outside of the lens portion 12.

  The optical member 14 is a member having a diaphragm function, a filter function, and an aberration correction function. The optical member 14 includes an inner barrel 19 and an IR cut filter unit 20.

  The inner barrel 19 is formed in a cylindrical shape. The outer diameter of the inner barrel 19 is set to be approximately the same as the inner diameter of the outer barrel 13. Thereby, the inner barrel 19 is stably and reliably supported without rattling at the set position in the outer barrel 13. A diaphragm 21 is formed on the outermost side in the optical axis direction of the inner barrel 19 (the outermost side when attached to a mobile phone or the like, the upper side in FIG. 3). The diaphragm 21 is an opening for taking in light from the outside and adjusting the amount of light and the diameter of the light. It is formed according to the set opening diameter.

  An annular notch 22 for supporting the IR cut filter unit 20 is formed on the innermost side in the optical axis direction of the inner barrel 19. An IR cut filter unit 20 is attached to the notch 22. The position of the notch 22 is accurately formed according to the set position of the correction film 25 described later.

  The IR cut filter unit 20 is the same member as in the first embodiment. That is, the IR cut filter unit 20 is already provided on the optical axis and has a filter function for cutting infrared rays. However, the IR cut filter unit 20 of the present embodiment does not have a function as a cover of the lens unit 12.

  The IR cut filter unit 20 includes a flat plate material 24 and a correction film 25.

  The flat plate 24 is made of a transparent plate, and an IR cut coat is applied to the outer surface in the optical axis direction. A correction film 25 is provided on the inner surface in the optical axis direction of the flat plate member 24. The correction film 25 is a film material for correcting aberration generated in the lens unit 12. The correction film 25 is set to an aspheric shape corresponding to the correction target aberration. That is, the correction film 25 is normally aspherical and is appropriately set to have a surface shape corresponding to the aberration to be corrected. Individually, distortion is the main correction target aberration. By providing the correction film 25 on the inner side of the lens unit 12, particularly distortion can be corrected with high accuracy. For this reason, it is desirable that the correction film 25 (flat plate member 24) is provided inside the lens unit 12 and at a position closer to the light receiving element. The correction film 25 is formed of an ultraviolet curable resin.

  Next, the manufacturing method of the optical member 3 is demonstrated based on FIG.

  First, as a first step, the flat plate 24 is fixed to the notch 22 of the inner barrel 19. Next, a liquid ultraviolet curable resin is applied to the surface of the mold 27 formed in a surface shape corresponding to the correction target aberration. Next, a curing process is performed as a second step in a state in which the ultraviolet curable resin is pressed against the inner surface in the optical axis direction of the flat plate member 24 attached to the inner barrel 19.

  In the second step, the ultraviolet curable resin is cured by irradiating ultraviolet rays from the diaphragm 21. Accordingly, the ultraviolet curable resin is cured in a short time, and the aspherical correction film 25 corresponding to the correction target aberration is formed.

  In parallel with this, the lens portion 12 is fixed in the outer barrel 13. The lens unit 12 is in contact with the support plate 17 of the outer barrel 13 in the optical axis direction and fixed with an adhesive or the like.

  Thereafter, the inner barrel 19 is attached to the inner side of the outer barrel 13 and fixed at the set position, whereby the assembly of the imaging lens 11 is completed. Next, the imaging lens 11 is incorporated into a main body such as a mobile phone through a holder or the like.

  With the imaging lens 11 configured as described above, the same functions and effects as those of the first embodiment described above can be achieved. In particular, in the imaging lens 11 of the present embodiment, as in the first embodiment, the correction film 25 is applied to the flat plate material 24 as an IR cut filter that has already been arranged on the optical axis, so that the existing lens The thickness of the lens etc. does not change substantially, and it is not bulky, and an aberration correction function can be added. This makes it possible to capture images while maintaining the small and thin state of optical equipment including optical members. Although the resolution, aberration, and the like of the lens 11 can be improved, the imaging lens 11 of the present embodiment can be an imaging lens that has an excellent function of absorbing distortion. In this case, the distortion aberration correcting function can be further enhanced by providing the correction film 25 as close to the light receiving element as possible.

[Modification]
(1) In each of the embodiments described above, the cellular phone has been described as an example. However, the present invention is not limited to the cellular phone, and may be a small device in which the imaging lenses 1 and 11 are configured by one or two lenses. Thus, the present invention can be applied, and thereby, the same operation and effect as the above-described embodiment can be achieved.

  Furthermore, the present invention can also be applied to an optical apparatus composed of three or more lenses. If a flat plate material such as a filter or a cover is provided in three or more lenses, the same operations and effects as those in the above embodiment can be achieved by applying the correction films 5 and 25 thereto. In order to apply the correction films 5 and 25, a flat plate material may be newly provided.

(2) In each of the above embodiments, the correction films 5 and 25 are applied to the inner surfaces of the flat plates 4 and 24. However, it goes without saying that the correction films 5 and 25 may be applied to the outer surfaces of the flat plates 4 and 24. Furthermore, you may give to the both sides | surfaces of the flat materials 4 and 24. FIG. An appropriate selection is made according to the aberration to be corrected.

(3) In the said 1st Embodiment, the flat plate materials 4 and 24 which are IR cut filters are utilized as a flat plate material which is a flat plate material which provides the correction | amendment films | membranes 5 and 25, and is arrange | positioned on the optical axis and performs a specific function. However, it goes without saying that other flat plate materials such as a cover and a UV cut filter may be used. Furthermore, a new flat plate material may be provided, and the correction films 5 and 25 may be applied to the flat plate material. Even when a flat plate material is newly provided, the flat plate material itself is not so thick, so that the imaging lenses 1 and 11 are not enlarged.

(4) In each of the above embodiments, the correction films 5 and 25 are formed of an ultraviolet curable resin and cured by an ultraviolet irradiation treatment, but other materials may be used. For example, the correction films 5 and 25 may be formed by heat treatment using a thermosetting resin. Furthermore, you may perform a drying process using quick-drying resin. In these cases, the correction films 5 and 25 can be formed in a short time as in the above embodiment.

(5) In the said 2nd Embodiment, although the flat plate material 24 was attached to the notch 22 of the inner barrel 19, you may provide in the outer barrel 13 side. Also in this case, the same operations and effects as the above embodiment can be achieved.

It is side surface sectional drawing which shows the lens for imaging which concerns on 1st Embodiment of this invention. It is a schematic diagram for demonstrating the manufacturing method of the optical member which concerns on 1st Embodiment of this invention. It is side surface sectional drawing which shows the imaging lens which concerns on 2nd Embodiment of this invention. It is a schematic diagram for demonstrating the manufacturing method of the optical member which concerns on 2nd Embodiment of this invention.

Explanation of symbols

1: imaging lens, 2: lens part, 3: second lens, 4: flat plate material, 5: correction film, 6: barrel, 7: body part, 8: support plate part, 9: aperture, 10: push mold 11: imaging lens, 12: lens portion, 13: outer barrel, 14: optical member, 16: body portion, 17: support plate portion, 19: inner barrel, 20: IR cut filter portion, 21: aperture portion, 22: Notch, 24: Flat plate material, 25: Correction film, 27: Mold.

Claims (9)

An optical member made of a flat plate that is disposed on the optical axis and performs a specific function,
An optical member, wherein one surface or both surfaces of the flat plate material is set to an aspherical shape for correcting aberration of an optical system in which the optical member is incorporated. The optical member according to claim 1,
An optical member, wherein a correction film set to an aspherical shape corresponding to the correction target aberration is applied to one surface or both surfaces of the flat plate material. The optical member according to claim 2,
The correction film is molded from a synthetic resin, and the synthetic resin is spread and applied to the outside of the functional surface of the aspherical shape corresponding to the correction target aberration to the flat plate material to fix the flat plate material. An optical member that functions as an adhesive for use. The optical member according to any one of claims 1 to 3,
An optical member, wherein the flat plate material is an IR cut filter. The optical member according to any one of claims 1 to 4,
The optical member, wherein the flat plate material is positioned inside a lens disposed on the optical axis. The optical member according to claim 5,
An optical member, wherein the flat plate member is located inside a lens disposed on the optical axis and in the vicinity of the light receiving element. A method of manufacturing an optical member that is disposed on an optical axis of an optical system and corrects aberrations of the optical system,
A synthetic resin is applied to one or both surfaces of the flat plate disposed on the optical axis, and a curing process is performed in a state where a pressing die set to an aspherical shape corresponding to the correction target aberration is pressed against the synthetic resin. Then, an aspherical correction film corresponding to the aberration to be corrected is formed. A method of manufacturing an optical member that is disposed on an optical axis of an optical system and corrects aberrations of the optical system,
A synthetic resin is applied to a mold set to an aspheric shape corresponding to the aberration to be corrected, and a curing process is performed in a state where the synthetic resin is pressed on one or both surfaces of the flat plate disposed on the optical axis. A method for manufacturing an optical member, comprising forming an aspherical correction film according to an aberration to be corrected. It is a manufacturing method of the optical member according to claim 7 or 8,
The synthetic resin is composed of a thermosetting resin, an ultraviolet curable resin, or a quick-drying resin,
The method for producing an optical member, wherein the curing treatment comprises heat treatment, ultraviolet irradiation treatment or drying treatment.

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