JPH0514241Y2 - - Google Patents

Description

[Detailed description of the invention] (Industrial field of application) The invention consists of a plurality of cylindrical lenses arranged in a row,
The present invention relates to a convergent optical transmission body used for transmitting images.

(Prior art and its problems) As a light transmitting body that has a light focusing property and transmits an image, it is known that cylindrical lenses with a refractive index gradient in the radial direction are arranged side by side. The optical transmission body includes a pair of substrates 902 and 9 as shown in FIG.
13 facing each other, a plurality of cylindrical lenses 6 having light focusing properties are arranged in parallel between the substrates 902 and 913, and both ends of the cylindrical lenses 6 in the juxtaposition direction are connected to a pair of spacers 914 and 914. They were held together and lined up.

According to this method, since each cylindrical lens 6 is not individually positioned, the degree of freedom of the cylindrical lens 6 is large, and the spacing between adjacent cylindrical lenses 6 varies greatly, making alignment easily disordered. In addition, it is necessary to apply a moderate force to arrange the cylindrical lenses 6 on the substrate 913, which requires skill, and further requires a spacer 914, which is a stopper in the direction in which the cylindrical lenses 6 are arranged side by side. There was a problem.

In addition, there is known a converging light transmitting body having grooves for positioning the cylindrical lenses 6 on the lower substrate as shown in FIG. A plurality of cylindrical lenses 6 are arranged in parallel between the upper substrate and the lower substrate 923.
V grooves 924 having substantially the same length as the cylindrical lenses 6 are formed on the upper surface and are continuous in the direction in which the cylindrical lenses 6 are arranged, and each of the cylindrical lenses 6 is disposed within the V grooves 924. Place the cylindrical lens 6 and V
It was positioned in an aligned state by line contact with the groove 924.

However, the V groove 924 in the lower substrate 923
... is provided, the outer periphery of the cylindrical lens 6 and the inner periphery of the V-groove 924 are in two line contact,
Since this contact area is wide-ranging, minute protrusions that occur during the manufacturing of the V-groove 924 may be included in the contact area, causing the arrangement of the cylindrical lenses 6 to be disordered, or the V-groove 924
In the case of a convergent light transmitting body that requires an array of cylindrical lenses 6, there is a risk of deterioration of optical performance due to the influence of protrusions caused by foreign matter such as minute dust attached to the inner periphery of the lens 4. .

Therefore, the purpose of the present invention is to significantly reduce the contact area between the cylindrical lens and the support part of the cylindrical lens by bringing the support part of the cylindrical lens into approximately point contact, thereby eliminating the microprotrusions that occur during manufacturing. It is an object of the present invention to provide a converging optical transmission body in which the disturbance of the arrangement of cylindrical lenses due to foreign matter such as dust is greatly improved.

(Means for Solving the Problems) In order to achieve the above object, the present invention includes a lower substrate on which a plurality of cylindrical lenses are arranged in parallel, and an upper substrate on which the cylindrical lenses on the lower substrate are sandwiched from above. The convergent light transmission body is characterized in that a support member is provided on the upper surface of the lower substrate, and the support member is arranged in substantially point contact with each of the cylindrical lenses at a plurality of locations.

(Function) Since a support member is interposed between the plurality of cylindrical lenses arranged in parallel and the lower substrate, which positions the cylindrical lenses by substantially contacting them at a point, the contact area between the cylindrical lenses and the support member can be greatly increased. As a result, the probability of dimensional defects and precision defects such as irregularities on the contact surface at the contact portion of the support member is extremely reduced, and the disorder of the arrangement of the cylindrical lenses can be greatly improved. I can do it.

(Embodiments) Preferred embodiments of the present invention will be described below based on the accompanying drawings.

Fig. 1 is a longitudinal cross-sectional view of a convergent optical transmission body according to the first embodiment of the present invention, Fig. 2 is an enlarged view of the same main part, and Fig. 3
The figure is a plan view of the lower substrate side.

As shown in FIG. 1, the convergent light transmitting body 1 includes a flat upper substrate 2 and a lower substrate 3 opposite to the upper substrate 2. It has an upright wall 4 that protrudes upward in the shape of a surrounding frame. This standing wall 4 consists of a left wall 41, a right wall 42, a front wall 43, and a rear wall 44, and the inside of the standing wall 4 is filled with ball members 5 made of glass or the like having the same shape and size. be done. At this time, all the ball members 5a in the first row are in contact with the left wall 41, and the ball members 5b in the last row are in contact with the right wall 42. Similarly, the ball members 5c in the first row contact the front wall 43, and the ball members 5d in the last row contact the rear wall 44, and by slightly shifting every other row, all the ball members 5 are packed closest. . The supporting member is constructed as described above.

At this time, a valley portion 51 in the front-rear direction is formed at the position indicated by the broken line 10 in FIG.
By placing the cylindrical lenses 6 on... as shown in FIG. 2, the cylindrical lenses 6 are supported in point contact with the ball members 5. Since the ball members 5 are formed into spherical shapes with the same radius and packed in the upright wall 4 in the closest density, they are arranged in parallel to each other in the valley portions 51, and therefore, they are placed on the valley portions 51. The cylindrical lenses 6 are arranged in parallel alignment with each other. An upper substrate 2 is placed on the cylindrical lens 6, and a predetermined pressure is applied to the upper substrate 2 and the lower substrate 3 using a clamp (not shown) or the like to hold them.
The spaces formed between the upper substrate 2, the cylindrical lenses 6, the ball members 5, and the lower substrate 3 are filled with a filler 7 and integrated as shown in FIG.

FIG. 5 is a perspective view showing the main parts of the second embodiment.

In the figure, 203 indicates a lower substrate, and this lower substrate 203
On the upper surface of the ball member 5 of the first embodiment, the ball member 5 is closely packed.
A spherical protrusion 205 having the same shape as the upper part of the support member is integrally molded using a mold, thereby forming a support member. The cylindrical lens and the upper substrate are arranged and configured in the same manner as in the first embodiment.

FIG. 6a is a perspective view of the third embodiment, and FIG. 6b is a view taken in the direction of arrow A. In this third embodiment, adjacent spherical protrusions 305 similar to those in the second embodiment are integrally molded on the lower substrate 303 with a predetermined distance between them, and the other configurations are the same as in the second embodiment. In this way, the spherical protrusion 30
5... by a predetermined interval l, the
As shown in the figure, the valley portions 351... can be formed large, and the distance l between the cylindrical lenses 6...
It is determined by the diameter etc.

7 to 10 show fourth to seventh embodiments.

In the embodiment shown in FIG. 7, a support member is constructed by arranging and integrally forming a large number of cylindrical protrusions 405 on the upper surface of the lower substrate 403, and forming circles between adjacent rows of the protrusions 405 as shown by broken lines. By placing the columnar lenses 6..., the columnar lenses 6... are aligned and supported in a point contact state, and the other configurations are the same as in the second embodiment.

In addition, in the embodiment shown in FIG. 8, protrusions 505 having a waveform in plan view, which are supporting members, are aligned and integrally formed on the upper surface of the lower substrate 503, and the adjacent waveform protrusions 505,
The cylindrical lens 6 is aligned and supported between the lenses 505 in point contact as shown by the broken line, and the other configurations are the same as in the second embodiment.

In the embodiment shown in FIG. 9, a large number of quadrangular pyramid-shaped protrusions 605 serving as supporting members are arranged and integrally molded on the upper surface of a lower substrate 603, and cylindrical lenses 6 are arranged between adjacent rows as shown by broken lines. The components are aligned and supported in a point contact state, that is, a partial line contact state, and the other configurations are the same as in the second embodiment.

The embodiment shown in FIG. 10 is constructed by integrally molding roughly semicircular semicylindrical semicylindrical protrusions 605 in an aligned state on the upper surface of a lower substrate 603, and placing cylindrical lenses 6 between adjacent rows as shown by broken lines. The cylindrical lens 6 is supported by the semicylindrical protrusions 605 in partial line contact, that is, in substantially point contact.

According to the embodiments described above, a support member is provided on the upper surface of the lower substrate for aligning the cylindrical lenses by substantially contacting each cylindrical lens at a plurality of points. The cylindrical lenses are positioned individually, which reduces the variation in the spacing between the cylindrical lenses, and allows the cylindrical lenses to be installed side by side without requiring any skill. There is no need for spacers, which are stop plates for the cylindrical lens, at both ends in the installation direction.
Moreover, in order to support the cylindrical lens with almost point contact,
The contact area between the cylindrical lens and the support member is significantly reduced, and therefore the probability of dust etc. adhering to it is greatly reduced, and since the area of the high-precision contact part is small, the approximate point of the contact part has a dimension The probability of occurrence of precision defects such as defects and irregularities on the contact surface is extremely reduced, and the disorder in the arrangement of the cylindrical lenses can be significantly improved.

(Effects of the invention) As is clear from the above explanation, according to the invention,
By supporting the cylindrical lens with almost point contact,
The contact area between the cylindrical lens and the supporting part of the cylindrical lens is greatly reduced, which greatly reduces the probability of dimensional defects or precision defects such as unevenness of the contact surface in the contact part, and the cylindrical lens It is possible to significantly improve the disorder of the arrangement.

[Brief explanation of drawings]

Fig. 1 is a vertical cross-sectional view of the first embodiment of the present invention, Fig. 2 is an enlarged view of the main parts, Fig. 3 is a plan view of the lower substrate side, and Fig. 4 is a cross-sectional view of the first embodiment of the present invention. 5 is a perspective view showing the main parts of the second embodiment, FIG. 6a is a perspective view of the third embodiment, FIG. 6b is a view taken in the direction of arrow A, and FIG. 10 to 10 are perspective views of the fourth to seventh embodiments, and FIGS. 11 and 12 are diagrams showing conventional examples. In the drawings, 2 is the upper substrate, 3, 203, 303,
403, 503, 603, 703, 803 are lower substrates, 5, 205, 305, 405, 505, 60
5 is a support member, and 6 is a cylindrical lens.

Claims (1)

[Claims for Utility Model Registration] A convergent optical transmission body comprising a lower substrate on which a plurality of cylindrical lenses are arranged in parallel, and an upper substrate that sandwiches the cylindrical lenses on the lower substrate from above, the lower substrate: A convergent light transmitting body, characterized in that a supporting member is provided on the upper surface of the cylindrical lens, and the support member is arranged in substantially point contact with each of the cylindrical lenses at a plurality of locations.