JPH0572402A - Production of lens plate - Google Patents

Abstract

PURPOSE:To easily produce the lens plate which is provided with diaphragms and slits at each of the respective lenses of the lens plate arranged with many lenses. CONSTITUTION:The curved surfaces of the respective convex lenses or (curved surfaces of the respective cylindrical convex lenses) arranged two-dimensionally in a prescribed arrangement form on one surface by a 1st forming molds on one surface of one lens plate half body of two pieces of the lens plate half bodies which can constitute the lens plate by integration. Coating surface of a light shielding material are formed in the parts exclusive of the apertures of the diaphragms to be formed near the centers of curvature (near the cylindrical axes of the respective cylindrical convex lenses) in accordance with the prototype of the 1st forming molds and further, the light shielding material is applied on the coating surfaces for the light shielding material to constitute the one lens plate half body 18a. The other lens plate half body constituting the lens plate by being integrated with the one lens plate half body 18a is formed on the surface of the one lens plate half body 18a formed with the diaphragms, by which the lens plate is produced.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of manufacturing a lens plate used for an optical card or the like.

[0002]

2. Description of the Related Art In recent years, bank cards, credit cards,
It is well known that cards, identification cards, memory cards, and other cards for various purposes are widely used. As described above, a rectangular card having the same shape and size as a credit card widely used in society is provided with an optical recording material layer, and the card is used as a so-called optical card as a recording medium for various information. Although attempts have been made to do so, for example, a rectangular card having the same shape and size as a credit card widely used in society can be used for a long time of light with a light intensity below a predetermined threshold value. A light formed by providing a recording layer having a two-dimensional spread with a recording material that is not recorded by irradiation and is recorded by irradiation with light having a light intensity equal to or higher than a predetermined threshold value. The card is a displacement driving machine for relatively linearly reciprocating the recording layer and the recording / reproducing element during the recording operation of the information signal to the recording layer and the reproducing operation of the information signal from the recording layer. However, it has been pointed out that the structure is more complicated than the rotational drive mechanism of the disk in the recording / reproducing apparatus for the disk-shaped information recording medium (disk), and there is a lot of loss of kinetic energy and vibration during operation. A rectangular card with the same size and shape as a credit card, which is widely used in society, is familiar to the general public, and a single optical card can record about 2 megabytes of information. Since it is possible, it is expected to be used for various purposes. For example, Drexera Technology Co., Ltd. of the United States has announced an optical card having the above-mentioned configuration.

In the above-mentioned optical card manufactured by Drexera Technology Co. of the United States of America, a clock track is pre-recorded and formed on one end of a preset recording area on the recording surface of the card, and at the other end. Tracking control tracks formed by continuous linear grooves are previously recorded and formed as information for tracking control, and an information signal track is recorded and formed in a portion between the clock track and the tracking control track. When recording the information signal to be recorded on the track of the information signal in the optical card, the laser light emitted from the light source in the recording / reproducing apparatus is collimated by the collimator lens and diffracted. The three light beams emitted from the diffraction grating are incident on the condenser lens, and the light is condensed. Then, the above-mentioned three light fluxes are converged to form an image on the clock track of the recording area of the optical card as a light spot with a small diameter, and also onto the tracking control track to form a light spot with a small diameter. Further, the optical card and the above-mentioned light spot are relatively displaced and driven by forming an image of a light spot having a minute diameter whose intensity is modulated by the information signal to be recorded on the track of the information signal. In this way, the information signal is recorded on the track of the information signal in the sequential recording area of the optical card by the light spot of the minute diameter whose intensity is modulated by the information signal to be recorded.

That is, the optical card is not recorded even when irradiated with light having a light intensity below a predetermined threshold for a long time, and is recorded by being irradiated with light having a light intensity above the predetermined threshold. A recording layer having a two-dimensional spread of a different recording material is provided, and a track of an information signal is irradiated with light having a light intensity equal to or higher than a predetermined threshold value by the information signal during the recording operation. As a result, the information signal to be recorded is recorded on the recording layer by the light spot Si having a minute diameter. Further, in the reproducing operation of the information signal from the optical card, three light fluxes having a constant light intensity below a predetermined threshold are made incident on the condenser lens so that recording is not performed on the recording layer in the optical card. A light spot with a small diameter is formed on the clock track in the recording area, and a light spot with a small diameter is formed on the tracking control track, so that the optical card described above and the light spot described above are relative to each other. It is carried out by displacing and driving, and applying the reflected light from the light spot to the photodetector. By the way, when an optical card is used to record an information signal having a large amount of information, the track pitch of the information signal track is naturally small, but it is presumed that it is widely used. Regarding optical cards and optical card recording / reproducing devices, it is possible to increase the mechanical precision of optical cards and optical card recording / reproducing devices to support high-density recording in terms of price. Therefore, even in the above-described conventional example, tracking control or other means is applied to enable high-density recording / reproduction. However, in the above-described conventional optical card, the entire recording area is not used for recording the information signal, but in each recording area, in addition to the information signal track, the clock track and the tracking control track are used. Since the recording capacity per unit area was reduced due to the provision of and, the need for tracking control (and focusing control) tracks, etc., and the advent of an optical card capable of high-density recording was long awaited. ..

As an optical card capable of solving the above problems, the applicant company has proposed an optical card LAC as previously disclosed in Japanese Patent Application Laid-Open Nos. 2-66724 and 2-68720. .. 10 and 12 are a perspective view and a side sectional view for explaining the operation of the optical card LAC disclosed in the above-mentioned Japanese Patent Laid-Open No. 2-66724, and FIG. Optical card L disclosed by Japanese Patent Laid-Open No. 2-68720
It is the perspective view which shows the structural example of AC, and the sectional side view for operation | movement description. The optical card LAC illustrated in FIG. 10 includes a convex lens plate FEL in which a plurality of minute convex lenses are two-dimensionally arranged in a predetermined arrangement mode, and individual convex lenses forming the convex lens plate FEL. A recording layer RML in which a recording / reproducing area corresponding to
Each of the recording / reproducing areas of a predetermined number of units, which is set so that each of the individual recording / reproducing areas in L is two-dimensionally divided and individual information is recorded / reproduced, is the convex lens. Each convex lens in the above-mentioned convex lens plate FEL so that when viewed through the convex lens from different predetermined angles with respect to the optical axis of Recording layer RM near the focal plane of
This is a configuration mode in which L is located.

Further, the optical card LA illustrated in FIG.
Reference numeral C denotes a cylindrical convex lens plate CLA in which cylindrical convex lenses having a minute width are closely arranged in parallel, and individual recording / reproducing areas individually corresponding to the individual cylindrical convex lenses constituting the cylindrical convex lens plate CLA. Recording layer RML and the above-mentioned recording layer R
A cylinder of a cylindrical convex lens in each of a predetermined number of units of recording / reproducing areas set so that each of the individual recording / reproducing areas of the ML is two-dimensionally divided and individual information is recorded / reproduced. The recording / reproducing area of each group of units arranged on one individual straight line parallel to the axis, when viewed through the cylindrical convex lens from different predetermined angles with respect to the optical axis of the cylindrical convex lens, respectively, In a configuration mode in which the recording layer RML is located near the focal plane of each cylindrical convex lens in the above-mentioned cylindrical convex lens plate CLA so that only a specific group of recording / reproducing areas can be seen as being enlarged by the cylindrical convex lens. is there.

The optical card L shown in FIGS. 10 and 11.
In AC, the substrate BP has a laminated structure of the protective layer 1 and the base material 2, and the recording layer RML is not recorded even by irradiation with light having a light intensity below a predetermined threshold for a long time. It is shown that the recording material is formed by two-dimensional expansion of the recording material such that recording is performed by irradiation with light having a light intensity equal to or higher than the predetermined threshold value. The recording layer RML has, for example, a two-layer structure of a silver salt pattern layer (crust layer) 4 and a lower gelatin layer 3 and emits light having a light intensity equal to or higher than a threshold light intensity for recording an information signal. The colloidal (gelatin) silver salt pattern layer containing silver particles provided on the focal plane of the convex lens of the convex lens plate FEL provided on the optical card LAC due to the heat of the light when it is incident on the card 1. It is described that the recording layer RML having a configuration in which the silver particles of No. 4 are dissolved in the lower gelatin layer 3 to form pits and recording corresponding to the information signal is performed on the recording layer is used. .. Reference numeral 60 in FIG. 11 is a protective film.

In order to record (write) required information on the recording layer RML in the optical card LAC configured as described above, for example, Japanese Patent Laid-Open No. 2-66724,
This can be performed by using an optical card recording / reproducing apparatus having a structure as shown in each of FIG. 8 of JP-A-2-68720. FIG. 12 shows the shape and size of one convex lens of the convex lens plate FEL provided in the optical card LAC provided with the convex lens plate FEL having the structure shown in FIG. 10 from the recording / reproducing structure (not shown). When a parallel light flux having substantially the same cross-sectional shape and cross-sectional size is made incident on one convex lens in the convex lens plate FEL, the incident direction of the incident light on the convex lens is changed so as to become a specific direction, and the light is changed. It is illustrated and explained that the position of the light spot imaged in the recording / reproducing area corresponding to the convex lens on which is incident can be set to a specific position in the recording / reproducing area. From a recording / reproducing structure (not shown) to an optical card LAC equipped with a cylindrical convex lens plate CLA having a configuration as shown in FIG. When a parallel light flux having a cross-sectional shape and a cross-sectional dimension that is substantially equal to the shape and size of one cylindrical convex lens of the cylindrical convex lens plate CLA being cut is made incident on one cylindrical convex lens in the cylindrical convex lens plate CLA, the cylindrical convex lens By changing the incident direction of the incident light with respect to each to a specific direction,
The position of the light spot imaged in the recording / reproducing area corresponding to the cylindrical convex lens on which the light is incident can be set to a specific position in the recording / reproducing area,
This is illustrated and explained.

That is, in FIG. 12, a cross-sectional shape and a cross section that are substantially equal to the shape and size of one convex lens (or one cylindrical convex lens) in the convex lens plate FEL (or the cylindrical convex lens plate CLA) from the lens 5 of the recording and reproducing structure. The recording / reproducing structure in the case where the parallel light flux of the size is made to enter one convex lens Lα (or the cylindrical convex lens Lα) in the convex lens plate FEL (or the cylindrical convex lens plate CLA) provided in the optical card LAC. From convex lens plate FEL
(Or in the cylindrical convex lens plate CLA)
When the direction of light incident on each of the convex lenses Lα (or one cylindrical convex lens) is changed as indicated by P1, P2, P3 in FIG. 12, each of the directions of P1, P2, P3 described above is changed. The incident light is the convex lens Lα (or 1
Light points Sα1 and S1 at different positions in the recording / reproducing area corresponding to the respective cylindrical convex lenses).
It shows that α2 and light spot Sα3 occur.

As described with reference to FIG. 12, the convex lens plate F provided on the optical card LAC from the recording / reproducing structure.
Each recording / reproducing area corresponding to each convex lens in the convex lens plate FEL is two-dimensionally divided by setting the direction of the light incident on one sequential convex lens in the EL to a specific direction, and The information recorded in the recording / reproducing areas of a predetermined number of units in each recording / reproducing area corresponding to the recording / reproducing area is recorded on the convex lens when the information signal is recorded in the recording / reproducing area of the unit. It is obtained by making the convex lens the light having the same incident direction as the incident light and having the same cross-sectional area as the light made incident on the convex lens when the information signal is recorded in the recording / reproducing area of the unit described above. When read by reflected light, the read record information is a specific one of the recording / reproducing areas of a plurality of units set in the recording / reproducing area corresponding to one convex lens. It is read as being enlarged to the size of the convex lens.

Further, as described with reference to FIG. 12, the direction of the light from the recording / reproducing structure which is made incident on one sequential cylindrical convex lens in the cylindrical convex lens plate CLA provided in the optical card LAC is a specific direction. Then, each recording / reproducing area corresponding to each cylindrical convex lens on the cylindrical convex lens plate CLA is two-dimensionally divided, and each recording / reproducing area corresponding to each recording / reproducing area is predetermined. The information recorded in each of the recording and reproducing areas of a different number of units, in the same incident direction as the incident direction of the light incident on the cylindrical convex lens when recording the information signal in the recording and reproducing areas of the unit, and, The light incident on the cylindrical convex lens when recording the information signal in the recording / reproducing area of the unit When the light having the same cross-sectional area is incident on the cylindrical convex lens and is read by the reflected light obtained, the recorded information to be read is recorded in a plurality of units set in a recording / reproducing area corresponding to one cylindrical convex lens. A specific one of the reproduction areas will be read as an image enlarged to the width of the cylindrical convex lens. Therefore, the information signals respectively recorded in the recording / reproducing areas of a plurality of units set in the recording / reproducing area corresponding to one convex lens or the cylindrical convex lens as described above are The light having the same direction and the same cross-sectional shape and dimension as the used light is incident on the convex lens or the cylindrical convex lens to obtain the same size as the convex lens or the same width as the cylindrical convex lens by the reflected light generated in the recording layer RML. Be done. As shown in FIG.
The optical card LAC shown in (or FIG. 11) is not recorded even by irradiation of light having a light intensity of a predetermined threshold value or less for a long time, and has a light intensity of the predetermined threshold value or more. Recording layer RML formed by two-dimensional spreading of recording material such that recording is performed by irradiation of light
And a convex lens plate FEL in which a plurality of minute convex lenses are two-dimensionally arranged in a predetermined arrangement on one surface of the recording layer RML (or a plurality of cylindrical convex lenses having a minute width on one surface of the recording layer RML). 2 in a predetermined arrangement
(Cylindrical convex lens plate CLA configured by arranging dimensionally) and individual convex lenses forming the convex lens plate FEL (or individual cylindrical convex lenses forming the cylindrical convex lens plate CLA)
In the individual recording / reproducing areas formed on the recording layer RML in correspondence with the individual recording / reproducing areas, the individual recording / reproducing areas are two-dimensionally divided into a predetermined number of units of recording / reproducing areas. Each of the recording / reproducing areas of the above-mentioned unit in which individual information is to be recorded / reproduced is set to a convex lens (or cylindrical lens) from a predetermined angle different from the optical axis of the convex lens (or cylindrical convex lens). The convex lens plate (or the convex lens plate) so that only a specific recording / reproducing area of one unit has the same size as the convex lens (or the same size as the width of the cylindrical convex lens) when viewed through the convex lens). A convex formed by positioning the recording layer on the focal plane of each convex lens (or cylindrical convex lens) in the cylindrical convex lens plate CLA). The convex lens plate FEL (or the cylindrical convex lens plate CLA) and the recording layer RML are optical cards in which at least a part thereof is provided, and therefore the convex lens plate FEL (or the cylindrical convex lens plate CLA) is formed. The recording / reproducing area corresponding to each convex lens (or cylindrical convex lens) is divided into two dimensions so that the recording / reproducing area is composed of a plurality of recording / reproducing area groups. Since different information signals are recorded / reproduced in the recording / reproducing area of each unit, high-density recording / reproducing is performed. In addition, the reproduction of the information signal in the recording / reproducing area of the unit is performed up to the size (width) of the convex lens. Since it is magnified and read, high-density recording / reproduction can be easily performed without using a means for automatic tracking control. Since recording / reproducing is performed by parallel light, recording / reproducing of an information signal can be performed by a recording / reproducing device having a simple mechanism without automatic focus control.
Since a recording member having a combination of an EL (or a cylindrical convex lens plate CLA) and a recording layer RML is used, for example, FIG. 7 of JP-A-2-66724 or FIG. 8 of JP-A-2-68720 is used. If an XYZ plotter as illustrated in FIG. 1 is used, stereoscopic image information can be easily recorded and reproduced on the recording layer RML in the optical card LAC.

With the already proposed optical card described with reference to FIGS. 10 and 11, high-density recording / reproduction can be easily performed without using the automatic tracking control means as described above. Since it is performed by parallel light, it has an excellent advantage that a high density recording / reproducing of an information signal can be easily performed by a recording / reproducing apparatus having a simple mechanism without automatic focus control. However, in the already proposed optical card described with reference to FIGS. 10 and 11, due to the aberrations of the individual convex lenses (or the individual cylindrical convex lenses forming the cylindrical convex lens plate CLA) that form the convex lens plate FEL. , The individual convex lenses (or the cylindrical convex lens plate C that form the convex lens plate FEL).
When the incident light to each of the individual cylindrical convex lenses constituting LA is the light Pa parallel to the optical axis of the convex lens (or the cylindrical convex lens), the recording layer RML
In comparison with the size Pap of the pit recorded and formed, the size Pbp of the pit recorded and formed in the recording layer RML is larger in the case of the light Pb which is not parallel to the optical axis of the convex lens (or the cylindrical convex lens). In some cases, the number of recording / reproducing areas to be formed in the recording / reproducing area cannot be increased, and as a result, it has been an obstacle to the realization of an optical card capable of higher density recording / reproducing. Then, the above-mentioned problems similarly occur even when the convex lens (or the cylindrical convex lens) is an aspherical lens. Light Pa, Pb, pits Pap, Pb described above
Since p and the like are also shown in FIG. 15 used in the description below, it is preferable to refer to them.

In order to solve the above-mentioned problems, the present applicant company has adopted an individual convex lens which constitutes the convex lens plate FEL.
(Or an individual cylindrical convex lens forming the cylindrical convex lens plate CLA) is provided with an optical diaphragm I (or slit I) shown in FIG. By preventing the obliquely incident light from reaching the recording layer RML, the aberration can be improved so that the spherical aberration becomes small with respect to the light incident from any direction, and a pit having a small diameter is formed in the recording layer RLM. By forming a record, an optical card capable of higher density recording can be provided.
That is, the optical diaphragm I shown in FIG. 15 is provided in the vicinity of the center of curvature of each convex lens forming the convex lens plate FEL so that light obliquely incident on the curved surface of the lens is recorded layer RML. 13 shows an example of the configuration of an optical card LAC in which the aberration is improved so that the spherical aberration is reduced with respect to the light that enters from any direction, and the cylindrical convex lens plate is used. A slit I shown in FIG. 15 is provided in the vicinity of the cylinder axis of each cylindrical convex lens forming the CLA so that light obliquely incident on the curved surface of the lens does not reach the recording layer RML. FIG. 14 shows an example of the configuration of an optical card LAC in which the aberration is improved so that the spherical aberration is reduced even with respect to obliquely incident light. Have been squeezed I or a slit I in an optical card LAC as shown in FIGS. 13 and 14 described above had is formed by providing a forming plate IP optical diaphragm in the lens plate. In FIG. 14, reference numeral 60 is a protective film, and in FIG. 15, R is the radius of curvature of the curved surface of the lens, FP is the focal plane, and θ1 is the angle between the direction of the light beam and the lens surface.

[0014]

The optical card as described above is required to be mass-produced. For that purpose, as described above, the vicinity of the center of curvature of each convex lens constituting the convex lens plate FEL is formed. Or a configuration mode in which an optical diaphragm forming plate IP for forming the diaphragm I and the slit I is provided near the cylindrical axis of each cylindrical convex lens that constitutes the cylindrical convex lens plate CLA. Since it is necessary to mass-produce the lens plates such as the convex lens plate FEL and the cylindrical convex lens plate CLA of FIG. 1, there is a manufacturing method capable of easily manufacturing the lens plate having the above-described configuration mode. I was asked.

[0015]

According to the present invention, a plurality of convex lenses are arranged in a two-dimensional manner in a predetermined arrangement so that each of the convex lens plates has two image forming regions.
Each of the predetermined number of units of the image forming regions divided so that individual information is imaged is predetermined differently with respect to the optical axis of the convex lens. When viewed through a convex lens from a given angle, only one specific unit image forming area is enlarged and seen by the convex lens, and it has an aperture center near the center of curvature of each convex lens in the convex lens plate. In order to manufacture a lens plate provided with a diaphragm, curved surfaces of the convex lenses which are two-dimensionally arranged in a predetermined arrangement mode are formed on one surface, and the convex lenses of the above-mentioned convex lenses on the other surface are formed. A step of obtaining a lens plate half body material in which a light-shielding material coating surface is formed on a portion other than the aperture of the diaphragm formed near the center of curvature; The step of applying a light-shielding material to the coated surface of the optical material to obtain one lens plate half body, and the one lens plate half body described above on the surface on which the diaphragm is formed. A method for manufacturing a lens plate, which comprises a step of forming the other lens plate half body which is integrated with the plate half body to form a lens plate, and an individual cylindrical convex lens plate in which cylindrical convex lenses are closely arranged in parallel. The image forming area of the cylindrical convex lens of 2 is two-dimensionally divided as an image forming plane of each group arranged on one individual straight line parallel to the cylindrical axis of the cylindrical convex lens described above, and individual information is respectively connected. Each of the predetermined number of units of image forming areas set so as to be imaged is different from the optical axis of the cylindrical convex lens. When viewed through a cylindrical convex lens from a given angle, only the image plane of each specific group of units appears to be magnified by the cylindrical convex lens. To manufacture a lens plate provided with a slit having the center of an opening, curved surfaces of cylindrical convex lenses which are two-dimensionally arranged in a predetermined arrangement are formed on one surface and the other surface. In the step of obtaining the material of the lens plate half body in which the coated surface of the light shielding material is formed in a portion other than the slit formed so as to have the center of the opening near the cylindrical axis of each of the cylindrical convex lenses in the above, Apply the light blocking material to the coated surface of the light blocking A step of obtaining a lens plate half body, and on the surface on which the light-shielding material coating surface of one of the lens plate half bodies is formed,
A lens plate manufacturing method comprising a step of forming a lens plate by being integrated with one lens plate half body described above, and a lens plate can be formed by integration. A first molding die used to form a curved surface shape of a lens on one surface of one of the two lens plate halves, and on the other surface of the one lens plate half. A method of manufacturing a lens plate using a second molding die used to form a coated surface of a light-shielding material manufactured from the same prototype;
A first molding die used for forming a curved surface shape of a lens on one surface of one lens plate half of the two lens plate halves capable of forming a lens plate by integration, The second molding die used for forming the coated surface of the light-shielding material on the other surface of the other half of the lens plate corresponds to a predetermined arrangement mode of a plurality of lenses constituting the lens plate. A first molding die having a convex curved surface shape and a second molding die having a concave curved surface shape corresponding to a predetermined arrangement mode of a plurality of lenses on the lens plate are used. A method for manufacturing a lens plate is provided.

[0016]

Using the first molding die used for forming the curved surface shape of the lens on one surface of one of the two lens plate halves which can form the lens plate by integration Then, the curved surface of each convex lens (or the curved surface of each cylindrical convex lens) which is two-dimensionally arranged in a predetermined arrangement mode is formed on one surface, and the other one surface of the one lens plate half body is shielded from light. Using a second molding die used to form the coated surface of the material, in a portion other than the aperture of the diaphragm to be formed near the center of curvature of each convex lens described above and near the cylindrical axis of each cylindrical convex lens described above. One lens plate half is made by applying the light-shielding material to the surface of the lens plate half on which the light-shielding material coating surface has been formed. Next, on the surface of the one lens plate half body on which the diaphragm is formed, the other lens plate half body which can form a lens plate by being integrated with the one lens plate half body described above. To form a lens plate.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The concrete contents of the method for manufacturing a lens plate of the present invention will be described in detail below with reference to the accompanying drawings. 1 to 7 are views for explaining the outline of the steps of each embodiment of the method for manufacturing a lens plate of the present invention.
FIG. 8 is a diagram used for explaining the problem, and FIG. 9 is a schematic diagram of a process for producing a prototype used in the method for producing a lens plate of the present invention.
9A and 9B are views used for explaining a process of manufacturing the lens plate. First, with reference to the schematic process diagram shown in FIG. 9, a lens plate to be manufactured is a convex lens plate FEL (a manufacturing example of a prototype of a molding die used in the method for manufacturing a lens plate of the present invention). An example of a method of manufacturing a master of a molding die in the case of a fly-eye lens plate) will be described. The lens plate is a cylindrical convex lens plate CLA.
When the master of the molding die used in the method for producing the lens plate in the case of the (lenticular plate) is produced, the spheres S, S ... In the description with reference to FIG. In FIG. 9A, 5 is a press machine, 5a is a substrate of the press machine, and 56 is a material layer having plasticity. The material layer 56 having plasticity is placed on the substrate 5a of the press machine 5. Is a large number of spheres S, S ...
Are arranged two-dimensionally in a predetermined arrangement mode. In FIG. 9 (a), a large number of spheres S, S ... Are in contact with each other on the flat substrate 5a via the material 27 having plasticity. Although a configuration example in the case of being arranged two-dimensionally in the state of being present is shown, in order to arrange the above-mentioned many spherical bodies S, S ... Two-dimensionally on the substrate 5a, for example, a large number of A concave portion or a small hole is provided in advance at each position on the substrate 5a on which the individual spheres S, S ... Are to be arranged, and the individual spheres S, S. In the case where it can be easily arranged in the recesses or small holes, a large number of spheres S, S ... Are arranged on the flat plate-shaped substrate 5a in a predetermined arrangement pattern at predetermined intervals. It is easy to arrange them two-dimensionally so that they are arranged on the substrate. The number of spheres S, benefits such as not to cause disturbance in the array pattern even S ... some errors to the size of individual ones of is obtained.

In FIG. 9A, 5a is a substrate,
Reference numeral 56 denotes a material that has plasticity even at a temperature equal to or higher than the softening temperature of the thermoplastic resin material 21. A large number of spheres S, S ... Having the same size, which are made of a material having rigidity even at a temperature equal to or higher than the softening temperature of the plastic resin material 21, are arranged two-dimensionally in a predetermined arrangement mode. .. Reference numeral 7 is a pressure plate of the press machine 5, and pressure 8 is applied to the pressure plate 7 and the substrate 5a.
When 9 is added, the material 56 having plasticity even at a temperature equal to or higher than the softening temperature of the thermoplastic resin material 21 is pressed into the gaps between the large number of spheres S, S ... And the substrate 5a. By appropriately setting the amount of the material 56 having plasticity even at a temperature equal to or higher than the softening temperature of the thermoplastic resin material 21 described above, the many spheres S, S ...
It is possible to make the state in which the gap between a and a is well filled with the plastic material 56 even at a temperature equal to or higher than the softening temperature of the thermoplastic resin material 21 as shown in FIG. 9B. ..

In FIG. 9C, a large number of spheres S, S ...
On one side of the above, after placing the thermoplastic resin material 21 for the mother board of the lens plate heated to a temperature not lower than the softening temperature, pressures 8 and 9 are applied to the pressure plate 7 and the substrate 5a to obtain the above-mentioned softening temperature. The thermoplastic resin material 21 for the mother board of the lens plate, which is heated to the above temperature, is embedded in the thermoplastic resin material 21 for the mother board of the lens plate up to about half of the sphere S. When pressure-bonded as described above, concave portions α, α ... Are formed by the large number of spheres S, S ... On the surface of the thermoplastic resin material 21, and the mother board MO of the lens plate is obtained {((in FIG. 9). See d). As shown in FIG. 9D, the depressions α, α ...
After the electroless plating layer (10) is attached to the mother plate MO of the lens plate made of the thermoplastic resin material 21a in which the metal plate 11 is formed, the master plate MA of the lens plate by the metal layer 11 by electroforming (FIG. 9).
(See (e)), and the lens plate stamper ST is formed by the metal layer 13 from the master plate MA of the lens plate by electroforming.
{Refer to (f) of FIG. 9}, or a release material layer is formed on the surface of the mother board MO of the lens plate where the depressions α, α ... Are formed.
After (10) is provided, a master board MA (see (f) in FIG. 9) of a resin lens plate in which the state of the above-mentioned surface is transferred is prepared, and then the resin lens plate After providing the electroless plating layer (12) on the surface of the master board MA, the electroforming method is applied to the stamper ST of the lens plate by the metal layer 13 (see FIG. 9).
(f)}, and after the stamper ST of the lens plate by the metal layer 13 is peeled off from the master MA MA, a hard metal layer such as chrome (or a release material) may be formed on the surface of the stamper ST if necessary. Layer) is adhered and formed to obtain a stamper ST (lens plate molding die) of the lens plate.

In FIG. 9 (g), the stamper ST of the lens plate described above is fixed to the pressure member 16 by the adhesive 14, and the lower mold of the press machine is integrated with the pressure member 16 described above. Reference numeral 18 is a transparent thermoplastic resin material used as a material for the fly-eye lens plate, and 17 is an upper die of the press machine. Then, a transparent thermoplastic resin material 18 used as a material for the lens plate is heated and sandwiched between the lower mold and the upper mold of the above-mentioned pressing machine, and a predetermined amount is provided between the upper mold and the lower mold. When the pressures 19 and 20 are applied, the shape of the surface of the stamper ST of the lens plate is transferred to the transparent thermoplastic resin material 18 used as the material of the lens plate, and the transparent thermoplastic resin material 18 is molded into the lens plate. To be done. In the figure, 15 is a release material layer.

As is clear from the outline of the process of manufacturing the prototype used in the method of manufacturing the lens plate of the present invention described with reference to FIG. 9 and the process of manufacturing the lens plate, the method of manufacturing the lens plate of the present invention. The master of the molding die used for is made based on a two-dimensional array of many spheres when the lens plate to be manufactured is a convex lens plate FEL (fly-eye lens plate). Also, when the lens plate to be manufactured is a cylindrical convex lens plate CLA (lenticular plate), the mold of the molding die used in the method of manufacturing the lens plate is a multiplicity of cylinders 2 instead of the sphere described above.
It is made based on a dimensional array. In the method of manufacturing a lens plate of the present invention, the method is used for forming a curved surface shape of a lens on one surface of one of the two lens plate halves which can be integrated to form a lens plate. A master that is commonly used in the production of the molding die 1 and the second molding die that is used to form the coated surface of the light shielding material on the other surface of the one lens plate half body described above. There is a case of the above-mentioned mother board MO of the lens board or a stamper ST of the lens board and a case of the master board MA of the lens board. First, in FIG. 1 showing an outline of a manufacturing process of a method of manufacturing a lens plate of the present invention, a mold member 22 shown in FIG. 1A is a mother of a lens plate to be manufactured. The mold member 22 has a surface shape similar to that of the stamper ST of the disc MO or the lens plate.
Can be manufactured as described above with reference to FIG. As a matter of course, as the mold member 22, a mother disk MO of a lens plate or a stamper ST of the lens plate, which is the object of manufacture, may be used.

Reference numeral 23 shown in FIG. 1 (a) denotes a surface of a mold member 22 having a surface shape similar to that of the mother disk MO of the lens plate or the stamper ST of the lens plate which is the object of the above-mentioned manufacture. Is a metal layer 23 formed by applying, for example, an electroforming method, and the shape of the transfer surface of the metal layer 23 from the mold member 22 is the same as that of the lens forming surface side of the lens plate to be manufactured. Is the same as the surface shape. Next, after peeling the metal layer 23 from the mold member 22, the metal layer 23 is subjected to a machining process such as a cutting process or a polishing process to remove a portion 23b shown by a dotted line in FIG. 1B. After removal, the member 23a having the flat portion 23c is obtained. Next, after the metal layer 24 is adhered and formed by applying an electroforming method to the member 23a shown in FIG. 1B, the portion of the metal layer 24 is described above.
Peel from. FIG. 1 (d) shows a member 24a separated from the member 23a, in which a part 24b indicated by a dotted line in a part of a protruding part of the member 24a is removed by an appropriate machining process. 24d, 24d ...
And flat portions 24c, 24c ... Next, FIG.
As shown in (d) of FIG.
After the metal layer 25 is adhered and formed as shown in FIG. 1E by applying an electroforming method to the member 24a provided with the flat portions 24c, 24c ... Is separated from the above-mentioned member 24a, the above-mentioned member 24a is obtained as the member 25a shown in the lower part of FIG. 1 (f).
, Which correspond to the flat portions 24c, 24c, and the protruding portions 24 of the member 24a.
, which is used to form a coated surface of the light-shielding material on the other surface of the other half of the lens plate half described above. A second molding die is obtained.

In FIG. 1 (f), reference numeral 18 denotes a transparent thermoplastic resin material used as a constituent material of one lens half of the lens plate. Further, 22 is a mother board MO of the lens plate or a stamper ST of the lens plate which is the object of manufacture.
The mold member 22 has a surface shape similar to that of the mold member 22. The mold member 22 is formed on one surface of one of the two lens plate halves constituting the lens plate by being integrated. On the other hand, in order to form the curved surface shape of the lens, it is used as the first mold for the upper mold in the hot press machine, and the metal layer portion 25a made based on the mold member 22 is the second mold. It is used as a lower mold in a heating press machine as a mold. In the transparent thermoplastic resin material 18 used as a constituent material of one lens half of the lens plate shown in FIG. 1 (f), the first molding die by the die member 22 is the upper die. And the arrow 25 in the figure for the thermoplastic resin material 18 which is heated in a softened state by a heating press machine in which the metal layer portion 25a is used as a second molding die. 19, 20
As described above, pressure is applied by the upper mold and the lower mold, whereby the surface shapes of the first and second molding dies described above are transferred to both surfaces thereof, as shown in FIG. The outer surface shape of the lens group is formed on one surface of the lens group, and the flat surface portions 18c, 18c ... Corresponding to the individual lenses of the lens group described above are formed on the other surface of the lens group. Protrusions 18 provided between the lenses
b, 18b ... And is an intermediate product of one lens plate half body 18a.

Next, on the projections 18b, 18b ... In the intermediate product of the one lens plate half body 18a described above, FIG.
When the coating layers 26 and 26 of the light shielding material are attached and formed as indicated by 26, 26 ... In (h) of FIG. 1, one lens plate half body 18a is obtained. The light-shielding material coating layers 26, 26 ... Can be formed by, for example, attaching black ink. Then, as shown in FIG. 1 (i), in the mold container 29 having the release material layer 6 provided on the inner surface thereof, the above-mentioned light-shielding material coating layers 26, 26 in one lens plate half body 18a. So that the photocurable resin 27 overflows from the mold container 27 into the mold container 29 from the container 7 containing the photocurable resin 27. An extra amount of the photo-curing resin 27 is injected. As described above, at the open end of the upper surface of the mold container 29 in which an excessive amount of the photo-curable resin 27 is poured so that the mold container 29 overflows, the cover plate 28 provided with the mold release material layer 6 is separated. The surface on the mold material layer 6 side is pressed. The lid plate 28 is made of a material transparent to light used for curing the photocurable resin.

When the surface of the cover plate 28 provided with the release material layer 6 on the release material layer 6 side is pressure-bonded to the open end of the upper surface of the mold container 29 as described above, it is contained in the photocurable resin 27. Ensure that the air that is trapped is removed. Next, (j) of FIG.
As shown in FIG. 3, the light used for curing the photo-curable resin is irradiated from the light source (not shown) through the cover plate 28 to the photo-curable resin 27 in the mold container 29,
When the photo-curable resin 27 in the mold container 29 is cured, one lens plate half body 18a mounted in the mold container 29 as described above and injected into the mold container 29 as described above. A completed lens plate in which the other lens plate half 27a made of the cured photo-curable resin 27 is integrated is obtained, and FIG. 1 (k) shows the completed lens plate described above. FIG. 3 is a side sectional view showing a state in which is taken out from the mold container 29 described above. The completed lens plate whose side sectional view is shown in FIG. 1 (k) is similar to the lens plates such as the convex lens plate FEL and the cylindrical convex lens plate CLA described with reference to FIGS. 13 and 14, The lens plate has a configuration in which the diaphragm I and the slit I are provided for each of a large number of lenses forming the lens plate. The light-shielding material coating layers 26, 26 shown in FIG.
The convex lens plate FEL described above with reference to FIGS.
It is a constituent member corresponding to the plate IP for forming an optical aperture in a lens plate such as or a cylindrical convex lens plate CLA.

As is apparent from the above description, according to the method of manufacturing the lens plate of the present invention, the optical diaphragm in the convex lens plate FEL, the cylindrical convex lens plate CLA, etc. described above with reference to FIGS. 13 and 14. It is possible to easily manufacture a lens plate having a configuration in which the forming plate IP of 1 is provided in the lens plate. That is, in the lens plates such as the convex lens plate FEL and the cylindrical convex lens plate CLA shown in FIGS. 13 and 14 described above, the diaphragms corresponding to the individual convex lenses in the large number of convex lenses forming the lens plate. I and the slit I corresponding to each cylindrical convex lens of the large number of cylindrical convex lenses forming the lens plate are correctly formed in the lens plate so that the optical diaphragm forming plate IP is formed in the lens plate. However, in the lens plate manufacturing method of the present invention, the lens plate can be formed by integration.
A first molding die used for forming a curved surface shape of a lens on one surface of one lens plate half of the two lens plate halves is used.
While forming the curved surface of each convex lens (or the curved surface of each cylindrical convex lens) that is arranged dimensionally,
A second molding die made on the basis of the same prototype as the first molding die described above, that is, for forming a light-shielding material coating surface on the other surface of one of the lens plate halves. The second molding die used for forming a coated surface of the light-shielding material on a portion other than the aperture of the diaphragm formed near the center of curvature of each convex lens (near the cylindrical axis of each cylindrical convex lens) described above. Since the light-shielding material is applied to the coated surface of the light-shielding material in the material of the lens plate half thus formed to form one lens plate half, the lens plate half of the lens plate half is formed by the above-mentioned first molding die. The arrangement of the curved surfaces of the convex lenses (or the curved surfaces of the cylindrical convex lenses) which are two-dimensionally arranged on one surface and the other molding surface of the lens plate half body by the second molding die described above. Formed in a two-dimensional array The respective convex lenses (or each cylindrical convex lens) array embodiment of coat-surface of the light-shielding material for each that,
It will be in a state that corresponds correctly. Therefore, even if there is unevenness in the arrangement of a large number of lenses in the prototype, the arrangement of the diaphragms and slits provided corresponding to the individual lenses in the aforementioned large number of lenses,
The diaphragm I (or slit I) provided corresponding to each convex lens (or cylindrical convex lens) in the completed lens plate has the same arrangement unevenness as the arrangement unevenness of a large number of lenses described above. The center position of the convex lens (or the cylindrical convex lens) is made to correspond to the center position of the corresponding convex lens (or the cylindrical convex lens). According to the lens plate manufacturing method of the present invention, a large number of minute convex lenses are arranged. A lens plate such as a convex lens plate or a cylindrical convex lens plate formed by arranging a large number of minute cylindrical convex lenses can be easily mass-produced with good characteristics.

Next, a method of manufacturing the lens plate of the present invention whose manufacturing process is schematically shown in FIG. 2 will be described. Figure 2
The mold member 30 shown in (a) has a surface shape similar to that of the master plate MA of the lens plate to be manufactured, and the mold member 30 is shown in FIG. Then, it can be manufactured as described above. As a matter of course, the master plate MA of the lens plate to be manufactured may be used as the mold member 30. Reference numeral 31 shown in FIG. 2 (a) is obtained by applying, for example, an electroforming method to the surface of the mold member 30 having the same surface shape as the master disk MA of the lens plate to be manufactured. The metal layer 31 formed by
The shape of the transfer surface from 0 is the same as the surface shape of the mother disk MO or stamper ST of the lens in the lens plate to be manufactured. Next, after peeling the metal layer 31 from the mold member 30, the metal layer 31 is subjected to a machining process such as a cutting process or a polishing process to form a portion 31b shown by a dotted line in FIG. 2B. Remove and remove the flat surface 3
A member 31a having 1c is obtained. Then, an electroforming method is applied to the member 31a shown in FIG. 2 (b) to deposit a metal layer 32 as shown in FIG. 2 (c). The part 32 is peeled off from the member 31a. FIG. 2D shows the member 31a.
Of the member 32a peeled off from the member 32a, a part 32b shown by a dotted line in a part of the spherical part of the member 32a is removed by appropriate machining to form flat parts 32d, 32d ..., 32c, 32c ... Is a concave flat surface portion corresponding to the above-mentioned projecting flat surface portions 31c, 31c.

The member 3 having the structure shown in FIG.
2a is a member having a configuration similar to that of the member 25a shown in FIG. Therefore, the member 32a is similar to the member 32a shown in the lower part of FIG. 2 (e) and has flat portions 32d, 32d ... And concave flat portions 32c, 32.
c, that is, the second molding die used for forming the coated surface of the light shielding material on the other surface of the lens plate half body described above. In FIG. 2E, reference numeral 18 is a transparent thermoplastic resin material used as a constituent material of one lens half of the lens plate.
Reference numeral 31 denotes the surface shape transferred from the mold member 30 having the same surface shape as that of the master disk MA as described above with reference to FIG. 2A, that is, the lens plate to be manufactured. Motherboard MO or lens plate stamper ST
A member having a surface shape similar to that of the member 3
1 is heated as a first molding die to form a curved surface shape of a lens on one surface of one of the two lens plate halves constituting the lens plate by being integrated. Used for the upper mold in the press machine.
Also, a member 32a made based on the mold member 30 described above.
Is used as the second mold for the lower mold in the hot press machine.

The transparent thermoplastic resin material 18 used as a constituent material of one lens half of the lens plate shown in FIG. 2 (e) is the same as the first molding die formed by the member 30 described above. It is used as an upper mold, and the member 32a is the second
Is supplied to the heating press machine used as the molding die for heating in a softened state, and pressure is applied by the upper die and the lower die as indicated by arrows 19 and 20 in the figure. As a result, the surface shapes of the above-described first and second molding dies are transferred to both surfaces thereof, and as described above with reference to FIG. The surface shape is formed, and on the other surface, flat portions 18c, 18c, ... Corresponding to the individual lenses in the lens group described above, and projections 18b provided between the individual lenses in the lens group, 18b ... and the intermediate lens plate half body 18a is an intermediate product, the subsequent steps are the same as those described above with reference to FIGS. The configuration as shown in FIG. Like lens plate can be obtained.

Next, a method of manufacturing the lens plate of the present invention whose manufacturing process is schematically shown in FIG. 3 will be described. In FIG. 3A, 33 is a container, and the mold release material layer 6 is formed on the inner wall surface of the container 33. Container 33 described above
Spheres (or cylinders) S, S of the same size on the bottom plate of
Are arranged two-dimensionally in a predetermined arrangement mode. The potting resin 34 is poured into the container 33 from another container 7 and solidified. After the resin block 34ad in a solidified state including the spheres (or cylinders) S, S ... As described above is taken out from the container 33, it is turned inside out and placed in the container 33. After being put in, potting resin 34 is injected from another container 7 into the container 33 and solidified as illustrated in FIG. 3B. FIG. 3C shows a state in which the resin blocks 34ad, 34ad in a solidified state including the spheres (or cylinders) S, S ... Made as described above are taken out of the container 33. Showing things. Next, as shown in FIG. 3 (c), the sphere (or cylinder) S,
As shown in FIG. 3 (d), the resin blocks 34ad and 34ad in a state of being integrally solidified containing S ... are divided into two resin block portions, that is, a portion 34a1 and a portion 34a2. Cut mechanically.

The above-mentioned two resin blocks 34a1,
Spheres (or cylinders) included in 34a2
When S, S ... Are removed, the resin block 34a described above is formed.
1 is the upper mold 34a1c shown in FIG. 3 (i), and the resin block 34a2 is the member 34a2c shown in FIG. 3 (e). Figure 3
On the member 34a2c shown in FIG. 3 (e), an electroforming method is applied to the member 34a2c as shown in FIG. FIG. 3 (g) is shown by a dotted line in FIG. 3 (g) after the metal layer 35 has been peeled from the member 34a2c and then subjected to machining such as cutting or polishing. By removing the portion 35d, a member 35a having a flat portion 35c, 35c ... And a concave flat surface portion 35b is obtained. Next, after the metal layer 36 is deposited by applying an electroforming method to the member 35a shown in FIG. 3G, the metal layer 36 is formed.
When the above portion is peeled from the above-mentioned member 35a, the peeled member 36a is a molding die having concave flat portions 36c, 36c ... And protruding flat surface portions 36b, 36b. This is a second molding die used for forming a coated surface of the light-shielding material on the other surface of the body, and this member 36a is a lower mold shown in FIG. 3 (i). Used as a mold.

In FIG. 3I, reference numeral 18 denotes a transparent thermoplastic resin material used as a constituent material of one lens half of the lens plate. Further, 34a1c is a mold member having a surface shape similar to that of the mother board MO of the lens plate or the stamper ST of the lens plate to be manufactured, and the mold member 34a1c is integrated to form the lens plate. It is used as an upper die in a hot press machine as a first molding die for forming a curved surface shape of a lens on one surface of one of the two lens plate halves constituting the above. In the transparent thermoplastic resin material 18 used as a constituent material of one lens half of the lens plate shown in FIG. 3 (i), the first molding die by the die member 34a1c is the upper die. The upper die and the lower die for the thermoplastic resin material 18 which is heated in a softened state by the heating press machine in which the member 36a is used as the second molding die. When pressure is applied by and
The surface shape of the second molding die is transferred to (j) of FIG.
, The outer surface shape of the lens group is formed on one surface, and the flat surface portion 18c corresponding to each lens in the lens group is formed on the other surface.
18c ... and concave portions 18e, 18e ... Provided between the individual lenses in the lens group, which is an intermediate product of one lens plate half body 18a.

Next, the one lens plate half 18a described above
3 in the recesses 18e, 18e ... in the intermediate product of FIG.
When the coating layers 26 and 26 of the light shielding material are attached and formed as indicated by 26, 26 ... In (k), one lens plate half body 18a is obtained. The light-shielding material coating layers 26, 26 ... Can be formed by, for example, attaching black ink. Next, as shown in (l) of FIG. 3, in the mold container 29 having the release material layer 6 provided on the inner surface thereof, the coating layers 26, 26 of the above-described light-shielding material in the one lens plate half body 18a. So that the photocurable resin 27 overflows from the mold container 27 into the mold container 29 from the container 7 containing the photocurable resin 27. An extra amount of the photo-curing resin 27 is injected. As described above, at the open end of the upper surface of the mold container 29 in which an excessive amount of the photo-curable resin 27 is poured so that the mold container 29 overflows, the cover plate 28 provided with the mold release material layer 6 is separated. The surface on the mold material layer 6 side is pressed. The lid plate 28 is made of a material transparent to light used for curing the photocurable resin.

When the surface of the lid plate 28 provided with the release material layer 6 on the release material layer 6 side is pressure-bonded to the open end of the upper surface of the mold container 29 as described above, it is contained in the photocurable resin 27. Ensure that the air that is trapped is removed. Next, in FIG.
As shown in FIG. 3, the light used for curing the photo-curable resin is irradiated from the light source (not shown) through the cover plate 28 to the photo-curable resin 27 in the mold container 29,
When the photo-curable resin 27 in the mold container 29 is cured, one lens plate half body 18a mounted in the mold container 29 as described above and injected into the mold container 29 as described above. The completed lens plate in which the other lens plate half 27a made of the cured photo-curable resin 27 is integrated is obtained, and FIG. 3 (n) shows the completed lens plate. FIG. 3 is a side sectional view showing a state in which is taken out from the mold container 29 described above. The completed lens plate whose side sectional view is shown in (n) of FIG. 3 is similar to the lens plates such as the convex lens plate FEL and the cylindrical convex lens plate CLA described above with reference to FIGS. 13 and 14, The lens plate has a configuration in which the diaphragm I and the slit I are provided for each of a large number of lenses forming the lens plate. The light-shielding material coating layers 26, 26 shown in FIG.
The convex lens plate FEL described above with reference to FIGS.
It is a constituent member corresponding to the plate IP for forming an optical aperture in a lens plate such as or a cylindrical convex lens plate CLA. As is clear from the above description, the plate for forming the optical aperture in the convex lens plate FEL, the cylindrical convex lens plate CLA, etc. described above with reference to FIGS. 13 and 14 is also obtained by the lens plate manufacturing method of the present invention. It is possible to easily manufacture a lens plate having a configuration in which IP is provided in the lens plate.

Next, a method of manufacturing the lens plate of the present invention whose manufacturing process is schematically shown in FIG. 4 will be described. Figure 4
In (a), 5 is a heating press machine, and spheres (or cylinders) S, S ... Of the same size are two-dimensionally arranged on the substrate 5a in a predetermined arrangement mode. Reference numeral 21 denotes a thermoplastic resin material, and spherical bodies (or cylinders) of the same size, which are two-dimensionally arranged in the above-described predetermined arrangement mode.
A thermoplastic resin material 21 heated in a softened state is placed on S, S ... and pressures 8, 9 are applied between the pressure plate 7 and the substrate 5a.
And the thermoplastic resin material 21 is added to the sphere described above.
(Or cylinder) S, S ...
By solidifying in that state, a block body 21a in which the thermoplastic resin material 21 and the spherical bodies (or cylinders) S, S ... Are integrated is obtained. The block body 21a
Is taken out from the heating press 5 and the block body 21
After the release material layer 47 is formed on the surfaces of the spheres (or cylinders) S, S ... in a, the above-mentioned block body 21a is placed in such a state that the surface on which the release material layer 47 is provided faces upward. Container 3 having a release material layer 6 formed on the wall surface
Then, as shown in FIG. 4B, the potting resin 34 is injected from another container 7 into the container 33 to solidify it.

After the potting resin 34 is solidified, it is taken out from the container 33 together with the block body 21a,
The portion of the solidified potting resin 34a and the portion of the block body 21a described above are separated by the portion of the release material layer 47. Next, the potting resin 34 solidified as described above is used.
When a part of the protrusion shown by the dotted line in FIG. 4 (c) in the portion a is cut off, the member 34a shown in FIG. 4 (c) is the same as the member 34a shown in FIG. 3 (e). Since the member 34a2c has the same structure as the member 34a2c described above, the subsequent steps are the same as those described above with reference to FIGS. 3 (f) to 3 (n), and finally shown in FIG. 3 (n). A lens plate having a configuration as described above is obtained. Instead of using the potting resin 34 described above, a photocurable resin may be used.

Next, FIG. 5 (f) to (m) of FIG. 3 described above as performed after obtaining the member 34a shown in FIG. 3 (e) and FIG. 4 (c). 3), each step that may be performed instead of each step of (f) to (h) of FIG. 3 is shown. First, in the step shown in FIG. 5A, an electroforming method is applied to the member 34a shown in FIGS. 3E and 4C to deposit and form the metal layer 37. In the process shown in FIG. 5B, the process shown in FIG.
After peeling the metal layer 37 from the member 34a shown in FIG. 3, the flat portion 37c, 37c is formed by subjecting the portion 37b shown by the dotted line in the figure to mechanical processing such as cutting or polishing.
.. is formed, and then the above-mentioned member 37 is formed.
An electroforming method is applied to a to form a metal layer 38 by adhesion as shown in FIG. 5C, and then the metal layer 38 is peeled from the member 37a shown in FIG. 5C. After that, in the step shown in FIG. 5D, the member 38a shown in FIG. 3 is obtained by removing the portion 38b of the projection shown by the dotted line in the figure.

FIG. 6 shows one lens plate half body 18a manufactured by the manufacturing process described with reference to FIG. 1 or the like, or one lens plate 18a manufactured by the manufacturing process described with reference to FIG. A case where a completed lens plate is manufactured by adhering a transparent resin plate 40 using a transparent adhesive 39 to the surface of the half plate 18a on which the coating layer 26 of the light shielding material is provided will be described. In FIG. 6, 41 is a roller, 42 is a rotation axis of the roller, and a transparent adhesive 39 is provided on the surface of the lens plate half body 18a on which the light-shielding material coating layer 26 is provided. And the transparent resin plate 40, and by advancing in the direction of the arrow X in the figure while pressing the roller 42 from above the transparent resin plate 40, the transparent resin plate 40 is adhered to the one lens plate by the adhesive 39. In half 18a Is adhered to the surface towards the coating layer 26 of the optical material is provided, it is to manufacture the finished lens plate.

Further, FIG. 7 shows one lens plate half body 18a manufactured by the manufacturing process described with reference to FIG. 1 or the like, or one lens plate half 18a manufactured by the manufacturing process described with reference to FIG. When a transparent resin plate 40 is adhered to the surface of the lens plate half 18a on which the light-shielding material coating layer 26 is provided by using the transparent heat-sealing material layer 43 to manufacture a completed lens plate. 6 is a diagram illustrating and explaining FIG. 6, 44 is a heating roller, 45 is a rotating shaft of the heating roller, and the surface of the lens plate half 18a on which the coating layer 26 of the light shielding material is provided Transparent heat-sealing material layer 43
By placing the transparent heat-sealing material layer 43 on the attached transparent resin plate 40 so as to abut, and advancing in the direction of arrow X in the figure while pressing the heating roller 42 from above the transparent resin plate 40, The transparent resin plate 40 is adhered to the surface of the half lens plate half 18a on which the light-shielding material coating layer 26 is provided by the heat sealing material layer 43 to manufacture a completed lens plate.

In the method of manufacturing a lens plate as described with reference to FIGS. 6 and 7, the light shielding material coating layer 26 is provided in the lens half having a large number of lenses and the light shielding material coating layer 26. On one side, transparent resin plate 4
When 0 is adhered by the transparent adhesive material layer 39 or the transparent heat-sealing material layer 43, the coating layer 26 of the light-shielding material may shrink after application to form a space. Lens half 1 made by the process described above
As in the case of the concave print, the black light ink shrinks after the application, as in the case of the concave print, as in the case of the concave print. Therefore, even if a space 46 is formed in the portion of the coating layer 26 of the light shielding material as illustrated in FIG.
Since the space 46 is in the portion of the coating layer 26 of the light shielding material, it does not have any adverse effect on the action of the lens plate.

[0041]

As is apparent from the above detailed description, the lens plate manufacturing method of the present invention is such that one of the two lens plate halves capable of forming the lens plate by integration is the lens plate half. Using the first molding die used to form the curved surface shape of the lens on one side of the body, the curved surface (or each of the curved surfaces of the respective convex lenses that are two-dimensionally arranged in a predetermined arrangement mode on one surface) A curved surface of a cylindrical convex lens) is formed, and a second molding die made by using the same prototype as the first molding die described above, that is, on the other one surface of one lens plate half body described above. By using the second molding die used for forming the coated surface of the light-shielding material, other than the aperture of the diaphragm formed near the center of curvature of each convex lens (near the cylindrical axis of each cylindrical convex lens) described above. In part In one lens plate half body, one lens plate half body is formed by applying a light shielding material to the coating surface of the light shielding material in the material of the lens plate half body having the coated surface of the optical material, and The lens plate is made by forming the other lens plate half on the surface where the diaphragm is formed so that the lens plate can be formed by being integrated with the one lens plate half described above. Even if there are irregularities in the arrangement of a large number of lenses, the arrangement of the diaphragms and slits provided corresponding to the individual lenses in the aforementioned large number of lenses is also the same arrangement as the unevenness of the aforementioned arrangement of a large number of lenses. Since the lens plate having the unevenness of the arrangement of a large number of lenses described above is not defective due to the unevenness of the lens, the method for producing a lens plate of the present invention arranges a large number of minute convex lenses. Then Can be easily mass-production of the lens plate and the lens plate, such as a number of minute cylindrical convex lens plate the cylindrical convex lens constructed by arranging a good characteristic ones.

[Brief description of drawings]

FIG. 1 is a diagram for explaining an outline of a process of each example of a method for manufacturing a lens plate of the present invention.

FIG. 2 is a diagram for explaining the outline of the steps of each example of the method for manufacturing a lens plate of the present invention.

FIG. 3 is a diagram for explaining an outline of a process of each embodiment of the lens plate manufacturing method of the present invention.

FIG. 4 is a view for explaining the outline of the steps of each example of the method for manufacturing a lens plate of the present invention.

FIG. 5 is a view for explaining the outline of the steps of each example of the method for manufacturing a lens plate of the present invention.

FIG. 6 is a view for explaining the outline of the steps of each example of the method for manufacturing a lens plate of the present invention.

FIG. 7 is a view for explaining the outline of the steps of each example of the method for manufacturing a lens plate of the present invention.

FIG. 8 is a diagram used for explaining a problem.

FIG. 9 is a diagram used for explaining an outline of a process for producing a prototype used in the method for producing a lens plate of the present invention and a process for producing the lens plate.

FIG. 10 is a perspective view of an optical card provided with a convex lens plate.

FIG. 11 is a perspective view of an optical card including a cylindrical convex lens plate.

FIG. 12 is a side sectional view for explaining the operation of the lens plate.

FIG. 13 is a perspective view of an optical card including a convex lens plate with a diaphragm.

FIG. 14 is a perspective view of an optical card provided with a cylindrical convex lens plate with slits.

FIG. 15 is a side sectional view for explaining the operation of the lens plate.

[Explanation of symbols]

LAC ... Optical card, FEL ... Convex lens plate, CLA ... Cylindrical convex lens plate, RML ... Recording layer, BP ... Substrate,
I ... Optical diaphragm (or slit), IP ... Optical diaphragm forming plate, .alpha .... Recess, MO ... Mother board of lens plate, MA ...
Master plate of lens plate, ST ... Stamper of lens plate, S ...
Sphere (or cylinder), 1 ... Protective layer, 2 ... Substrate, 3 ... Gelatin layer, 4 ... Silver salt pattern layer (crust layer), 5 ... Press machine, 5a ... Press machine substrate, 6, 47 ... Release material layer,
7, 33 ... Container, 14 ... Adhesive material, 16 ... Pressurizing member, 17
... upper die of press machine, 18 ... transparent thermoplastic resin material used as material for lens plate, 18a ... one lens plate half body, 21 ... thermoplastic resin material, 22 ... mold member, 26 ... application of light shielding material Layer, 27 ... Photocurable resin, 29 ... Mold container, 34
... potting resin, 39 ... transparent adhesive, 40 ... transparent resin plate, 41 ... roller, 42 ... roller rotation shaft, 43 ...
Transparent heat-sealing material layer, 44 ... Heating roller, 45 ... Rotating shaft of heating roller, 56 ... Plastic material layer, 60 ... Protective layer,

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[Procedure amendment]

[Submission date] September 7, 1992

[Procedure Amendment 1]

[Document name to be amended] Statement

[Name of item to be corrected] Brief explanation of the drawing

[Correction method] Change

[Correction content]

[Brief description of drawings]

FIG. 1 is a diagram for explaining an outline of steps in an embodiment of a method for manufacturing a lens plate of the present invention.

FIG. 2 is a diagram for explaining an outline of steps of an embodiment of the lens plate manufacturing method of the present invention.

FIG. 3 is a view for explaining the outline of the steps of the embodiment of the lens plate manufacturing method of the present invention.

FIG. 4 is a view for explaining the outline of the steps of the embodiment of the lens plate manufacturing method of the present invention.

FIG. 5 is a view for explaining the outline of the steps of the embodiment of the lens plate manufacturing method of the present invention.

FIG. 6 is a view for explaining the outline of the steps of the embodiment of the lens plate manufacturing method of the present invention.

FIG. 7 is a view for explaining the outline of the steps of the embodiment of the method for manufacturing a lens plate of the present invention.

FIG. 8 is a diagram used for explaining a problem.

FIG. 9 is a diagram used for explaining an outline of a process for producing a prototype used in the method for producing a lens plate of the present invention and a process for producing the lens plate.

FIG. 10 is a perspective view of an optical card provided with a convex lens plate.

FIG. 11 is a perspective view of an optical card including a cylindrical convex lens plate.

FIG. 12 is a side sectional view for explaining the operation of the lens plate.

FIG. 13 is a perspective view of an optical card including a convex lens plate with a diaphragm.

FIG. 14 is a perspective view of an optical card provided with a cylindrical convex lens plate with slits.

FIG. 15 is a side sectional view for explaining the operation of the lens plate.

[Explanation of Codes] LAC ... Optical card, FEL ... Convex lens plate, CLA ... Cylindrical convex lens plate, RML ... Recording layer, BP ... Substrate,
I ... Optical diaphragm (or slit), IP ... Plate for forming optical diaphragm, .alpha .... Recess, MO ... Mother board of lens plate, MA
… Lens plate master plate, ST… Lens plate stamper, S
... sphere (or cylinder), 1 ... protective layer, 2 ... substrate, 3 ...
Gelatin layer, 4 ... Silver salt pattern layer (crust layer), 5 ...
Press machine, 5a ... Press machine substrate, 6,47 ... Release material layer, 7,33 ... Container, 14 ... Adhesive material, 16 ... Pressing member,
17 ... Upper die of press machine, 18 ... Transparent thermoplastic resin material used as material of lens plate, 18a ... One lens plate half body, 21 ... Thermoplastic resin material, 22 ... Mold member, 26 ...
Coating layer of light-shielding material, 27 ... Photocurable resin, 29 ...
34 ... potting resin, 39 ... transparent adhesive, 40 ...
Transparent resin plate, 41 ... Roller, 42 ... Roller rotation axis, 4
3 ... Transparent heat-bonding material layer, 44 ... Heating roller, 45 ... Rotating shaft of heating roller, 56 ... Material layer having plasticity, 60 ... Protective layer,

[Procedure Amendment 2]

[Document name to be corrected] Drawing

[Correction target item name] All drawings

[Correction method] Change

[Correction content]

[Figure 4]

[Figure 5]

[Figure 6]

[Figure 7]

[Figure 1]

[Fig. 2]

[Figure 8]

[Figure 10]

FIG. 11

[Fig. 13]

[Figure 3]

[Fig. 12]

FIG. 14

[Figure 9]

FIG. 15

Claims (4)

[Claims] 1. An image forming area of each convex lens in a convex lens plate, which is formed by arranging a plurality of convex lenses two-dimensionally in a predetermined arrangement mode, is two-dimensionally divided, and individual information is respectively formed. Each of the image forming areas of a predetermined number of units set to be imaged is individually identified when viewed through the convex lens from different predetermined angles with respect to the optical axis of the convex lens. A method of manufacturing a lens plate comprising a diaphragm having an aperture center in the vicinity of the center of curvature of each convex lens in a convex lens plate in which only one unit image forming area is enlarged and viewed by the convex lens. A curved surface of each convex lens that is two-dimensionally arranged in a predetermined arrangement is formed on one surface, and near the center of curvature of each convex lens described above on the other surface. A step of obtaining a material of a lens plate half body having a coating surface of the light shielding material formed on a portion other than the aperture of the diaphragm to be formed in To obtain one lens plate half, and to integrate the one lens plate half on the surface of the one lens plate half on which the diaphragm is formed. And a step of forming the other lens plate half that constitutes the lens plate by. 2. A group of image forming areas of individual cylindrical convex lenses in a cylindrical convex lens plate in which cylindrical convex lenses are closely arranged in parallel are arranged on respective individual straight lines parallel to the cylindrical axis of the cylindrical convex lens. Each of the predetermined number of units of image forming areas, which are divided two-dimensionally as the image forming surface of the unit, are set so that individual information is formed into an image. In the cylindrical convex lens plate, when viewed through the cylindrical convex lens from different predetermined angles with respect to the axis, only the image plane of each specific group of units is made to appear as being magnified by the cylindrical convex lens. Each cylindrical convex lens has a center of aperture near the cylindrical axis. A method for manufacturing a lens plate provided with a rit, wherein curved surfaces of cylindrical convex lenses that are two-dimensionally arranged in a predetermined arrangement are formed on one surface, and A step of obtaining a material for a lens plate half having a coated surface of a light shielding material formed on a portion other than a slit formed so as to have an opening center near the cylindrical axis of a cylindrical convex lens; A step of applying a light-shielding material to a surface of a body material to apply a light-shielding material to obtain one lens plate half, and a surface of the one lens plate half to which the light-shielding material is applied On the surface of the lens plate, the step of forming the other lens plate half that constitutes the lens plate by being integrated with the one lens plate half described above. 3. A lens plate that can be integrated to form a lens plate 2.
A first molding die used to form a curved surface shape of a lens on one surface of one of the two lens plate halves, and on the other surface of the one lens plate half. A method of manufacturing a lens plate using a second molding die used to form a coated surface of a light shielding material, which is produced from the same original die. 4. A lens plate that can be integrated to form a lens plate 2.
A first molding die used to form a curved surface shape of a lens on one surface of one of the two lens plate halves, and on the other surface of the one lens plate half. As the second molding die used for forming the coated surface of the light shielding material, a first molding die having a convex curved surface shape corresponding to a predetermined arrangement mode of a plurality of lenses forming the lens plate A method of manufacturing a lens plate, wherein a molding die and a second molding die having a concave curved surface shape corresponding to a predetermined arrangement mode of a plurality of lenses in the lens plate are used.