JP5525860B2 - Lens manufacturing method - Google Patents

Description

The present invention relates to the production how the lens, for example, on what to manufacture the lens of the ultraviolet curing resin is 2 stage curing.

  10 and 11 are diagrams showing a method for manufacturing the conventional microlens 200. FIG.

  In order to manufacture the conventional microlens 200 (see FIGS. 11B and 11C), first, a liquid ultraviolet curable resin 206 is dropped onto a mold 204 in which a large number of minute concave portions 202 are formed. (See FIGS. 10A and 10B).

  Subsequently, the glass plate 208 is placed on the mold 204 to which the liquid ultraviolet curable resin 206 is dropped, and the ultraviolet light emitted from the ultraviolet ray generator 210 is irradiated to the liquid ultraviolet curable resin 206 to cure the cured ultraviolet curable resin 212. (See FIG. 10C and FIG. 11A).

  Subsequently, the cured ultraviolet curable resin 212 is separated from the mold 204 to obtain the microlens 200 (see FIGS. 11B and 11C).

  For example, Patent Document 1 can be cited as a document related to the prior art.

JP-A-5-228946

  By the way, in the conventional microlens 200, when the liquid ultraviolet curable resin 206 filling the space between the mold 204 and the glass plate 208 is cured to become a cured ultraviolet curable resin 212 (see FIG. 11 (a)), and the volume of the ultraviolet curable resin is slightly changed.

  Due to the slight change in volume and the sandwich between the mold 204 and the glass plate 208, there is a problem that defects such as dents 216 and cracks 218 occur in the fine convex portions 214 of the microlens 200, for example. .

  This problem occurs not only in a microlens but also in a lens used for a mobile phone camera or the like.

  The present invention has been made in view of the above problems, and an object of the present invention is to provide a lens that is free from defects such as dents and cracks.

  The first aspect of the present invention is a first photosensitive material supply step for supplying a liquid photosensitive material to a portion of a mold provided with a plurality of recesses, and the first photosensitive material supply step. After the photosensitive material is supplied in step 1, the film is installed in the part of the mold, the film is installed in the film installation step, and the photosensitive material is cured by irradiating an electromagnetic wave of a predetermined wavelength. After the photosensitive material is cured in the first photosensitive material curing step, the first photosensitive material curing step, the film separating step for separating the film, and the film separating in the film separating step, A second photosensitive material supplying step of supplying a liquid photosensitive material to the surface of the cured photosensitive material to which the film has been attached; and a liquid photosensitive material in the second photosensitive material supplying step. After feeding, A substrate installation process for installing the substrate on the surface of the cured photosensitive material to which the film has adhered, and after the substrate is installed in the substrate installation process, the photosensitive material is cured by irradiating an electromagnetic wave of a predetermined wavelength. It is a manufacturing method of the lens which has a 2nd photosensitive material hardening process.

  According to a second aspect of the present invention, in the method of manufacturing a lens according to the first aspect, after the photosensitive material is cured in the first photosensitive material curing step, the cured photosensitive material is separated from the mold. Then, after separating the mold, the film is separated in the film separating step, or after separating the film in the film separating step, the cured photosensitive material is separated from the mold, and after separating the mold, It is a manufacturing method of the lens which supplies photosensitive material at the 2nd photosensitive material supply process.

  According to a third aspect of the present invention, in the lens manufacturing method according to the first aspect, after the photosensitive material is cured in the second photosensitive material curing step, the mold is separated from the cured photosensitive material. It is a manufacturing method of a lens.

  According to the present invention, it is possible to provide a lens that is free from defects such as dents and cracks.

It is a figure which shows the outline | summary of the manufacturing method of the micro lens which concerns on the 1st Embodiment of this invention. It is a figure which shows the outline | summary of the manufacturing method of the micro lens which concerns on the 1st Embodiment of this invention. It is a figure which shows the outline | summary of the manufacturing method of the micro lens which concerns on the 1st Embodiment of this invention. It is a flowchart which shows the outline | summary of the manufacturing method of the micro lens which concerns on the 1st Embodiment of this invention. It is a figure which shows the outline | summary of the manufacturing method of the lens which concerns on the 3rd Embodiment of this invention. It is a figure which shows the outline | summary of the manufacturing method of the lens which concerns on the 3rd Embodiment of this invention. It is a figure which shows the outline | summary of the manufacturing method of the lens which concerns on a modification. It is a figure which shows the outline | summary of the manufacturing method of the lens which concerns on a modification. It is a figure which shows the outline | summary of the lens which concerns on the further modification. It is a figure which shows the manufacturing method of the conventional microlens. It is a figure which shows the manufacturing method of the conventional microlens.

[First Embodiment]
1-3 is a figure which shows the outline | summary of the manufacturing method of the microlens 1 which concerns on the 1st Embodiment of this invention, and FIG. 4 is a flowchart which shows the outline | summary of the manufacturing method of the microlens 1. FIG.

  First, the microlens 1 will be described.

  As shown in FIG. 3C, the microlens 1 includes a substrate (for example, a flat glass plate capable of transmitting visible light and ultraviolet light) 3 made of a material capable of transmitting electromagnetic waves in a predetermined wavelength band, and The first lens component (detailed later, for example, the cured UV curable resin cured in step S5 in FIG. 4) 5 and the second lens component (detailed later, for example, FIG. 4). And a cured ultraviolet curable resin 7 cured in step S15).

  The first lens component 5 is made of, for example, a material capable of transmitting visible light, and has a flat plate portion 9 parallel to the glass plate 3 and one surface in the thickness direction of the flat plate portion 9. A plurality of minute (for example, many) convex portions 11 provided side by side (the lower surface in FIG. 3C) are provided.

  The second lens component 7 is also made of a material that can transmit visible light. The second lens component 7 is provided integrally with the glass plate 3 and the flat plate portion 9 between the glass plate 3 and the flat plate portion 9.

  To further explain with an example, the glass plate 3 is formed in a rectangular flat plate shape, and the flat plate portion 9 of the first lens component 5 is approximately the same size as the glass plate 3 or larger than the glass plate 3. It is formed in a slightly small rectangular flat plate shape. A large number of minute projections 11 are formed on one surface of the flat plate-like portion 9 (the surface opposite to the second lens component 7 and the glass plate 3) in a rectangular region existing inside this surface. Is provided.

  Note that a large number of minute protrusions 11 may be provided on the entire surface of the one surface of the plate-like portion 9. Further, the one surface (the lower surface in FIG. 3 (c) or the like) of the flat plate-like portion 9 provided with a large number of minute projections 11 is a flat surface, but the other surface of the flat plate-like portion 9 (FIG. 3 (c) and the like, the upper surface) is a curved surface (an irregular surface having a large curvature radius) that is very slightly bent, as will be described in detail later.

  The minute convex portion 11 is formed in a plano-convex lens shape according to the shape of the minute plano-convex lens-shaped concave portion 15 (see FIG. 1A, etc.) of a mold (for example, a mold) 13, and has a circular bottom surface. (In FIG. 3, the upper end surface of the convex portion 11) exists on one surface (lower surface) of the flat portion 9.

  The second lens component 7 is formed in a rectangular flat plate shape in the same manner as the first lens component 5, and is formed on the other surface (upper surface) of the plate-like portion 9 of the first lens component 5. Covers the entire surface. One surface (lower surface) in the thickness direction of the second lens component 7 is fixed to the entire upper surface of the flat portion 9 of the first lens component 5.

  Further, the other surface (upper surface) in the thickness direction of the second lens component 7 and the lower surface of the glass plate 3 are the lower surfaces of the flat portion 9 of the first lens component 5 (the circle of the minute convex portion 11). The surface on which the bottom surface of the shape exists) and, for example, a parallel plane. As described above, since the upper surface of the flat plate-like portion 9 of the first lens component 5 is slightly curved, the thickness of the second lens component 7 is set to the curve of the flat plate-like portion 9. It has changed accordingly.

  By the way, the one obtained by removing the glass plate 3 from the microlens 1 shown in FIG. 3C (comprising the first lens component 5 and the second lens component 7) is used as a microlens. Also good. That is, the microlens 1 may be configured by the first lens configuration unit 5 and the second lens configuration unit 7.

  Next, a method for manufacturing the microlens 1 will be described.

  First, a liquid photosensitive material (a material that cures when irradiated with electromagnetic waves of a predetermined wavelength; for example, an ultraviolet curable resin) 17 is supplied to the mold 13 (first supply of an ultraviolet curable resin; FIG. 1). (A), (b), see step S1 in FIG. 4).

A large number of minute recesses 15 are provided side by side in a predetermined portion of the mold 13 (for example, a planar upper surface of a rectangular mold). These concave portions 15 are formed in, for example, a circular plano-convex lens shape, and become deeper at the center of the concave portion 15 toward the center of the concave portion 15. The supply of the mold 1 3 liquid ultraviolet curing resin 17 to the to the site of mold 13 provided side by side fine large number of concave portions 15 is done by the ultraviolet curable resin 17 for example dropwise.

The fine recesses 15 are arranged in a matrix, for example. That is, at a predetermined pitch in each concave portion 15, the vertical direction of the upper surface of the mold 13 (direction perpendicular to the paper surface of FIG. 1A) and the horizontal direction of the upper surface of the mold 13 (left-right direction of FIG. 1A). Are lined up. Further, the pitch of the recesses 15 adjacent to each other is equal to or slightly larger than the diameter of the recesses 15. Therefore, when viewed in plan (when viewed from the top to the bottom in FIG. 1A), the recesses 15 are arranged at a slight interval.

The pitch of the recesses 15 adjacent to each other may be equal to the diameter of the recesses 15 or may be smaller than the diameter of the recesses 15. Furthermore, it may be each other by respective recesses 15 arranged in a honeycomb shape. In other words, in a plan view, each recess 15 may be aligned with each circle inscribed in each regular hexagon arranged in a plane (the upper surface of the mold 13) without a gap.

  A region where each recess 15 is provided (a region where the recess 15 is formed) is, for example, a rectangular shape that is slightly smaller than the upper surface of the rectangular mold 13. The region where the recess 15 is formed is located in FIG. Accordingly, there is a “B” -shaped portion having a slight width in which the concave portion 15 is not formed on the outer peripheral portion of the upper surface of the mold 13. A recess 15 may be provided on the entire upper surface of the mold 13.

  The supply of the liquid ultraviolet curable resin 17 to the upper surface of the mold 13 is performed, for example, by dropping the ultraviolet curable resin 17 almost at the center of the upper surface of the mold 13 (region where the recess 15 is formed). In a state where the liquid ultraviolet curable resin 17 is supplied to the upper surface of the mold 13, the liquid ultraviolet curable resin 17 rises at the center of the upper surface of the mold 13 due to surface tension, as shown in FIG. It does not spread over the entire upper surface of the mold 13. In some cases, the liquid ultraviolet curable resin 17 may spread over the entire upper surface of the mold 13 in a film state with the liquid ultraviolet curable resin 17 supplied to the upper surface of the mold 13.

  In addition, when the area of the upper surface of the mold 13 is large, the liquid ultraviolet curable resin 17 may be dropped and supplied to a plurality of locations on the upper surface of the mold 13.

  Subsequently, after supplying the ultraviolet curable resin 17 for the first time, a flat film (for example, a film made of PET resin) made of a material having elasticity and transmitting electromagnetic waves (for example, ultraviolet rays) of a predetermined wavelength. ) 19 is placed over the part of the mold 13 (for example, the upper surface of the mold 13) (see step S3 in FIGS. 1C, 2A, and 4).

  The film 19 is set so that the ultraviolet curable resin 17 supplied for the first time enters all the recesses 15 of the mold 13.

  For example, the film 19 is formed in a rectangular shape having substantially the same size as the upper surface of the mold 13. When viewed in plan with the film 19 installed, the film 19 overlaps the mold 13 and covers the entire upper surface of the mold 13. The film 19 may be slightly larger or slightly smaller than the upper surface of the mold 13.

  Further, in the state where the film 19 has been installed, one surface (for example, the lower surface) in the thickness direction of the film 19 faces the upper surface of the mold 13 substantially in parallel. The mold 13 and the film 19 sandwich the ultraviolet curable resin 17 supplied for the first time. Further, the liquid UV curable resin 17 is leveled so that the liquid UV curable resin 17 enters all the recesses 15 of the mold 13, and the liquid UV curable resin 17 is separated from each recess 15 (upper side). A flat thin film (a rectangular thin film having the same shape as the upper surface of the mold 13; a thin film constituting the flat portion 9 of the first lens component 5 described above by being cured) is formed by the ultraviolet curable resin 17. ing. The upper surface of the thin film is in surface contact with, for example, substantially the entire lower surface of the film 19.

Subsequently, after the film 19 is installed, the ultraviolet curable resin 17 is irradiated with ultraviolet rays (ultraviolet rays generated by the ultraviolet ray generator 18) through the film 19 to cure the ultraviolet curable resin 17 (FIGS. 2A and 4). (See step S5). Then, a first (first) cured UV curable resin (first lens component) 5 is obtained. Cured UV curable resin 5 in the first time, a flat thin film portion (above flat plate-like portion) 9, a number of minute projections formed integrally on the lower surface for example of the flat plate-like portion 9 Part (a large number of fine convex portions in the shape of plano-convex lenses formed by a large number of fine concave portions 15 of the mold 13) 11. The first lens component 5 is attached to the mold 13 and the film 19.

  Subsequently, after curing the ultraviolet curable resin 17 (after obtaining the first cured ultraviolet curable resin 7), the cured ultraviolet curable resin 7 is separated (peeled) from the mold 13, and the mold 13 is separated. Later, the film 19 is separated (peeled) from the cured ultraviolet curable resin 7 (see FIGS. 2B, 2C, and steps S7 and S9 in FIG. 4).

  The upper surface (a rectangular surface opposite to the surface on which the fine convex portions 11 are provided) of the thin film portion (flat plate portion) 9 of the cured ultraviolet curable resin 7 that appears after separating the film 19. As described above, the curved surface is very close to a flat surface, such as slightly wavy rather than a complete flat surface. The reason for such a curved surface is that when the liquid ultraviolet curable resin 17 supplied in step S1 is cured, the volume of the ultraviolet curable resin changes very slightly, and elasticity is provided according to the change in the volume. This is because the film 19 is elastically deformed into a slightly bent plate shape.

  Note that step S7 and step S9 shown in FIG. 4 may be interchanged. That is, after the ultraviolet curable resin 17 is cured and the film 19 is separated, the cured ultraviolet curable resin 17 may be separated from the mold 13.

Subsequently, after separating the film 19 and the mold 13 from the cured ultraviolet curable resin 7, a liquid ultraviolet curable resin 21 ( first to the ultraviolet curable resin 17 may be the same type of the ultraviolet curing resin Tsu der, different a type may be.), in the same manner as the supply of first ultraviolet curing resin 17, the enemy under such (See step S11 in FIG. 3A and FIG. 4). That is, the second UV curable resin 21 is supplied.

  In a state where the liquid UV curable resin 21 is supplied to the upper surface of the first cured UV curable resin 5, the liquid UV curable resin 21 rises at the center of the upper surface of the cured UV curable resin 5 due to surface tension. And does not spread over the entire upper surface of the cured ultraviolet curable resin 5. The liquid UV curable resin 21 may be spread over the entire upper surface of the cured UV curable resin 5 in a state where the liquid UV curable resin 21 is supplied to the upper surface of the cured UV curable resin 5. .

  Subsequently, after the supply of the UV curable resin 21 for the second time, the supplied liquid UV curable resin 21 spreads in a film shape on almost the entire upper surface of the cured UV curable resin 5 to which the film 19 is attached. Then, the glass plate 3 that can be regarded as a rigid body is placed on the surface (for example, the upper surface) of the cured ultraviolet curable resin 5 to which the film 19 is attached (see FIG. 3B and step S13 in FIG. 4).

  When viewed in plan with the glass plate 3 installed, the glass plate 3 overlaps the mold 13 and the first cured UV curable resin 5 so as to overlap the upper surface of the mold 13 or the cured UV curable resin 5. Covering the entire surface. The glass plate 3 may be slightly larger or slightly smaller than the upper surface of the mold 13.

  Moreover, in the state where the glass plate 3 has been installed, the glass plate 3 is installed so that one surface (for example, the lower surface) in the thickness direction of the glass plate 3 faces the upper surface of the first cured ultraviolet curable resin 5. The liquid UV curable resin 21 supplied for the second time is sandwiched between the cured UV curable resin 5 and the glass plate 3. The sandwiched liquid UV curable resin 21 is in the form of a thin film, and the lower surface of the thin film is in surface contact with almost the entire upper surface of the first cured UV curable resin 5. Is in surface contact with, for example, substantially the entire lower surface of the glass plate 3.

  When the glass plate 3 is slightly larger than the upper surface of the mold 13, the upper surface of the thin film is a peripheral portion of the lower surface of the glass plate 3 (a portion having a “B” shape with a slight width). ) Are in surface contact with the rectangular part on the central side, which is a part excluding).

  Moreover, in FIG.3 (b), although the liquid ultraviolet curable resin 21 supplied 2nd time is represented by the thin flat plate (The flat plate whose up-down direction of FIG.3 (b) is thickness), As described above, due to the volume change when the first UV curable resin 17 is cured, the upper surface of the first cured UV curable resin 5 has a curved surface such as a slight undulation. The lower surface of the actual liquid ultraviolet curable resin 21 shown in FIG. 3B is a curved surface very close to a flat surface following the curved surface of the cured ultraviolet curable resin 5. On the other hand, the upper surface (surface in contact with the lower surface of the glass plate 3) of the actual liquid ultraviolet curable resin 21 shown in FIG. 3B is a flat surface.

  Further, since the upper surface of the first cured UV curable resin 5 is a curved surface, the cured UV curable resin 5 and the glass plate 3 can be present without the liquid UV curable resin 21 being present between them. In some cases, a direct contact portion may exist.

  The lower surface of the glass plate 3 is the upper surface of the mold 13 or the lower surface of the flat portion 9 of the first cured UV curable resin 5 (surface on which a large number of convex portions 11 are provided; It is parallel to the surface on which the circular flat bottom surface of the portion 11 is located.

  Subsequently, after the glass plate 3 is installed, the ultraviolet curable resin 21 is irradiated with ultraviolet rays (ultraviolet rays emitted from the ultraviolet ray generator 18) through the glass plate 3 to cure the ultraviolet curable resin 21 (FIG. 3B, FIG. 3). (C), see step S15 in FIG. 4). That is, the second UV curable resin 21 is cured. As a result, a second (second) cured UV curable resin (second lens component) 7 is obtained.

  According to the method of manufacturing the microlens 1, the film 19 having elasticity is placed on the mold 13 to which the liquid ultraviolet curable resin 17 is supplied, and the ultraviolet curable resin 17 is cured. Even if the volume of the ultraviolet curable resin 17 changes slightly, the film 19 is elastically deformed according to the change in volume. Then, the ultraviolet curable resin 17 is cured in a state where almost no internal stress is generated. Thereby, defects, such as a dent and a crack, are not generated in the cured ultraviolet curable resin 5, and the microlens 1 having no defects can be obtained.

  Note that the upper surface of the UV curable resin 5 cured for the first time (the surface opposite to the surface on which the minute projections 11 are formed) is a curved surface that is slightly bent by elastic deformation of the film 19. However, since the upper surface of the microlens 1 is flattened by the ultraviolet curable resin 21 supplied for the second time, the microlens 1 having an accurate shape can be obtained.

  Moreover, according to the manufacturing method of the microlens 1, after the ultraviolet curable resin 17 supplied for the first time is cured, the cured ultraviolet curable resin 5 is separated from the mold 13 or the film 19 is separated and then cured. Since the used ultraviolet curable resin 5 is separated from the mold 13, the use cycle of the mold 13 can be shortened and the mold 13 can be used efficiently.

  That is, the mold 13 is not used from the initial stage to the final stage of the process of manufacturing the microlens 1, and the mold 13 is not used in a relatively previous stage of the manufacturing process of the microlens 1. Can be used to manufacture the next microlens 1. And the metal mold | die 13 can be used efficiently.

  By the way, the process of step S7 shown in FIG. 4 may be moved after step S15. That is, the mold 13 may be separated from the cured ultraviolet curable resin 7 after the second ultraviolet curable resin is cured.

  Thereby, after the ultraviolet curable resin 21 supplied for the second time is cured, the mold 13 is separated from the cured ultraviolet curable resin 5, so that an intermediate product (for example, a metal mold) appearing in the course of the manufacturing process of the microlens 1 is separated. It is easy to handle the mold 13 and the UV curable resin 5 and the film 19 which are supplied and cured for the first time.

  That is, since the intermediate product part can be handled while supporting the highly rigid mold 13, the intermediate product part can be easily handled and the microlens 1 can be easily manufactured.

[Second Embodiment]
The lens according to the second embodiment of the present invention is different from the microlens 1 in that a convex portion corresponding to the minute convex portion 11 of the microlens 1 according to the first embodiment is greatly formed. This point is configured in the same manner as the microlens 1 according to the first embodiment, and is manufactured in the same manner as the microlens 1 and has substantially the same effect.

  That is, the convex part of the lens according to the second embodiment is a lens used for a camera of a mobile phone, for example, and has a diameter of about 1.5 mm to 3 mm and a maximum thickness of about 0.4 mm to 0.5 mm. belongs to.

  Also in the second embodiment, a lens similar to the lens shown in FIG. 3C (a lens in which a plurality of convex portions are integrally formed) is obtained. However, in the second embodiment, after that, cutting is performed. Thus, each convex part is separated into one by one to form a lens.

[Third Embodiment]
5 and 6 are diagrams showing an outline of a method for manufacturing the lens 1a according to the third embodiment of the present invention.

  The lens 1a according to the third embodiment of the present invention is different from the microlens according to the second embodiment in that the lenses 1a are molded one by one, and the other points are the lenses according to the second embodiment. Is manufactured in the same manner as the microlens according to the second embodiment, and exhibits substantially the same effect.

  That is, in the manufacturing method of the lens 1a, first, as shown in FIG. 5A, the liquid ultraviolet curable resin 17a is dropped and supplied to the concave portion 15a of the mold 13a (first supply).

  Subsequently, as shown in FIG. 5 (b), the film 19a is covered and irradiated with ultraviolet rays from the ultraviolet ray generator 18a to cure the ultraviolet curable resin 17a, thereby generating the first lens component 5a. At this time, the volume of the ultraviolet curable resin 17a changes and the film 19a is deformed (see FIG. 5C).

  Subsequently, as shown in FIG. 6A, the film 19a is separated to obtain the first lens component 5a, and the concave portion (the surface on which the film 19a is in contact; the irregularity of the first lens component 5a; irregular) The liquid UV curable resin 21a is dropped and supplied to the surface (second supply).

  Subsequently, as shown in FIG. 6B, the substrate 3a is placed on the portion where the ultraviolet curable resin 21a is accumulated, the ultraviolet ray is irradiated from the ultraviolet ray generator 18a, the ultraviolet curable resin 21a is cured, and the second The lens configuration unit 7a is generated (see FIG. 6C).

  What was obtained by this became the convex part 11a equivalent to the minute convex part 11 of the microlens 1 which concerns on 1st Embodiment, and becomes the lens 1a.

The lens 1a may be provided with a substrate 3 a, the substrate 3 a may be removed. Moreover, it is desirable that the volume of the ultraviolet curable resin 17a is larger than the volume of the ultraviolet curable resin 21a.

  By the way, the lens 1a according to the third embodiment may be appropriately changed. 7 and 8 are diagrams showing an outline of a manufacturing method of the lens 1b according to the modification.

  The lens 1b according to the modified example is configured in the same manner as the lens 1a according to the third embodiment except that the flat plate-like portions 9b and 10b are formed, and is manufactured in the same manner as the lens 1a. The effect is almost the same.

  In the manufacturing method of the lens 1b according to the modification, first, as shown in FIG. 7A, the liquid ultraviolet curable resin 17b is dropped and supplied to the recess 15b of the mold 13b (first supply). .

  Subsequently, as shown in FIG. 7B, the film 19b is covered, and ultraviolet rays are irradiated from the ultraviolet ray generator 18b to cure the ultraviolet curable resin 17b, thereby generating the first lens component 5b. At this time, the volume of the ultraviolet curable resin 17b changes and the film 19b is deformed (see FIG. 7C).

  Subsequently, as shown in FIG. 8A, the film 19b is separated to obtain the first lens component 5b, and the concave portion (the surface on which the film 19b is in contact) of the first lens component 5b; The liquid ultraviolet curable resin 21b is dropped and supplied to the surface (second supply).

Subsequently, as shown in FIG. 8B, the substrate 3b is covered and irradiated with ultraviolet rays from the ultraviolet ray generator 18b to cure the ultraviolet curable resin 21b, thereby generating the second lens component 7b (FIG. 8 ). (See (c)).

  What was obtained by this became the convex part 11b equivalent to the micro convex part 11 of the microlens 1 which concerns on 1st Embodiment, and becomes the lens 1b. In addition, in the lens 1b, the flat part 9b and the flat part 10b are formed by increasing the amount of the liquid ultraviolet curable resins 17b and 21b.

  Furthermore, in the lens 1b according to the modified example, the ultraviolet curable resin 21b supplied for the second time may be reduced so that the flat plate portion 10b is not formed (see FIG. 9A). Furthermore, the ultraviolet curable resin 17b supplied for the first time may be reduced so that the flat plate portion 9b is not formed.

  In the third embodiment, the plate-like portion 9b and the plate-like portion 10b may be removed by cutting after molding the lens 1b, or appropriate concave portions are provided in the substrates 3a and 3b, so that the first lens is formed. A biconvex lens including the component 5b and the second lens component 7c may be generated (see FIG. 9B).

1 Microlens 1a, 1b Lens 3, 3a, 3b Glass plate (substrate)
5, 5a, 5b First lens component (first cured UV curable resin)
7, 7a, 7b, 7c Second lens component (second cured UV curable resin)
9, 9b Flat part 11 Minute convex part 11a, 11b Convex part 13, 13a, 13b Mold (mold)
15, 15a, 15b Concave part 17, 17a, 17b (first time) liquid UV curable resin 19, 19a, 19b Film 21, 21a, 21b (second time) liquid UV curable resin

Claims (3)

A first photosensitive material supply step of supplying a liquid photosensitive material to a portion of a mold provided with a plurality of recesses;
A film installation step of installing a film on the part of the mold after supplying the photosensitive material in the first photosensitive material supply step;
A first photosensitive material curing step of curing the photosensitive material by irradiating an electromagnetic wave of a predetermined wavelength after the film is installed in the film installation step;
A film separating step for separating the film after curing the photosensitive material in the first photosensitive material curing step;
A second photosensitive material supplying step of supplying a liquid photosensitive material to the surface of the cured photosensitive material to which the film has been attached after separating the film in the film separating step;
A substrate installation step of installing a substrate on the surface of the cured photosensitive material to which the film is attached after supplying the liquid photosensitive material in the second photosensitive material supply step;
A second photosensitive material curing step of curing the photosensitive material by irradiating an electromagnetic wave of a predetermined wavelength after the substrate is installed in the substrate installation step;
A method for producing a lens, comprising: In the manufacturing method of the lens of Claim 1,
After the photosensitive material is cured in the first photosensitive material curing step, the cured photosensitive material is separated from the mold, and after the mold is separated, the film is separated in the film separation step,
Alternatively, after separating the film in the film separation step, the cured photosensitive material is separated from the mold, and the photosensitive material is supplied in the second photosensitive material supply step after the separation of the mold. A method for manufacturing a lens. In the manufacturing method of the lens of Claim 1,
Producing how the lens, characterized in that after curing the photosensitive material in the second photosensitive material curing step, separating the mold from the hardened photosensitive material.

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