WO2015026065A1

WO2015026065A1 - Optical lens, and optical lens production device and production method

Info

Publication number: WO2015026065A1
Application number: PCT/KR2014/006673
Authority: WO
Inventors: 심용식; 이민호
Original assignee: 주식회사 지앤아이솔루션
Priority date: 2013-08-23
Filing date: 2014-07-23
Publication date: 2015-02-26

Abstract

An optical lens production device according to an embodiment of the present invention comprises: an upper mould formed so as to have at least one upper cavity area for forming an optical lens; a lower mould formed so as to have at least one lower cavity area for forming the optical lens; and a resilient member formed between the upper mould and the lower mould.

Description

Optical lens, optical lens manufacturing device and manufacturing method

The present invention relates to an optical lens, and more particularly, to a manufacturing apparatus and a manufacturing method for efficiently producing an optical lens.

An optical lens refers to an object made of a transparent material for collecting or dispersing light. The optical lens may be manufactured by a method of forming a desired shape by polishing an object (eg, glass or quartz) made of a transparent material.

Recently, an optical lens manufacturing method for melting a polymer compound such as plastic and injecting the same into a mold has been introduced. In the case of the plastic injection molding method, there is a cavity implemented in the shape of a desired lens in the mold, and the injection machine injects the molten plastic resin into the mold through the sprue. The injected molten plastic resin is filled in the cavity in the mold and then cooled. When cooling is complete, the plastic is molded into the shape of the cavity to produce an optical lens.

In the case of the optical lens manufacturing method through the plastic injection, birefringence may occur in the plastic forming the optical lens according to the cooling rate difference of the molten plastic resin. In order to reduce the birefringence phenomenon caused by the difference in cooling rate of the plastic resin, the injection pressure of the resin may be increased or the temperature of the mold may be kept high, but this decreases the production speed and lowers the productivity.

On the other hand, the photocurable resin refers to a synthetic organic material that is crosslinked and cured by receiving light energy such as ultraviolet (UV) or electron beam (EB). Resin cured by an ultraviolet-ray is called ultraviolet curable resin, and resin hardened | cured by an electron beam is called electron beam curable resin. As an alternative to the optical lens manufacturing method through injection molding of plastic resin, a method for manufacturing the optical lens through the photocuring resin has been developed. Korean Patent Laid-Open No. 10-2010-0088480 discloses a method of manufacturing an optical lens using an ultraviolet curable resin.

In manufacturing an optical lens using a photocuring resin, a manufacturing method is required to make the manufacturing method efficient and to obtain a high yield.

SUMMARY OF THE INVENTION The present invention has been made in view of the foregoing, and an object of the present invention is to provide an efficient optical lens manufacturing method and an optical lens manufacturing apparatus for increasing the yield of an optical lens in an optical lens manufacturing method using a photocuring resin.

An optical lens manufacturing apparatus according to an embodiment of the present invention for realizing the above-described problems, the upper mold is formed with at least one upper cavity area for forming the optical lens, at least one lower for forming the optical lens And a lower mold having a cavity region formed therein and an elastic member formed between the upper mold and the lower mold.

In addition, according to another embodiment of the present invention, there is provided a method of manufacturing an optical lens, comprising: disposing an upper mold having one or more upper cavity regions for forming an optical lens, and one or more lower cavity regions for forming an optical lens; Disposing the formed lower mold and disposing an elastic member between the upper mold and the lower mold.

In addition, the optical lens manufacturing apparatus according to another embodiment of the present invention, the upper mold is formed at least one upper cavity region for forming the optical lens, the at least one upper cavity region for forming the optical lens is formed A lower mold and an elastic portion formed to surround at least a portion of an extension line of an outer surface of the upper mold or the lower mold.

The optical lens manufacturing method and the optical lens manufacturing apparatus according to the embodiment of the present invention described above can improve productivity of the optical lens manufacturing method by efficiently manufacturing the optical lens and increasing its yield.

The effects of the present invention are not limited to those mentioned above, and other effects, which are not mentioned above, will be clearly understood by those skilled in the art from the following description.

Various aspects are now described with reference to the drawings, wherein like reference numerals are used to refer to like components throughout. In the following examples, for purposes of explanation, numerous specific details are set forth in order to provide a thorough understanding of one or more aspects. However, it will be apparent that such aspect (s) may be practiced without these specific details. In other instances, well-known structures and devices are shown in block diagram form in order to facilitate describing one or more aspects.

1 is a view showing a hierarchical structure of a manufacturing apparatus in an optical lens manufacturing apparatus according to an embodiment of the present invention.

2A is a view illustrating in detail a part of the hierarchical structure of the lens forming unit in the optical lens manufacturing apparatus according to the embodiment of the present invention.

2B is a view illustrating in detail a part of the hierarchical structure of the lens forming unit in the optical lens manufacturing apparatus according to another embodiment of the present invention.

FIG. 3A is a cross-sectional view of a partially hierarchical structure of the lens forming unit shown in FIG. 2A.

FIG. 3B is a view when the elastic member is compressed in some hierarchical structure of the lens forming unit shown in FIG. 3A.

3C is a cross-sectional view of a part of a hierarchical structure of a lens forming unit in the optical lens manufacturing apparatus according to another embodiment of the present invention.

4A to 4B illustrate an embodiment of an exposure method of an optical lens manufacturing method according to an embodiment of the present invention.

5 is a view showing another embodiment of the exposure method of the optical lens manufacturing method according to an embodiment of the present invention.

6 is a view showing another embodiment of the exposure method of the optical lens manufacturing method according to an embodiment of the present invention.

7 illustrates an optical lens manufacturing apparatus 100 according to another embodiment of the present invention.

8 is a view illustrating a lower plate 122C of the lens manufacturing apparatus 100 according to an embodiment of the present invention.

9 is a view showing an upper plate 121C of the lens manufacturing apparatus 100 according to an embodiment of the present invention.

10 is a cross-sectional view of the lens manufacturing apparatus 100 according to an embodiment of the present invention.

Various embodiments and / or aspects are now disclosed with reference to the drawings. In the following description, for purposes of explanation, numerous specific details are set forth in order to provide a thorough understanding of one or more aspects. However, it will also be appreciated by one of ordinary skill in the art that this aspect (s) may be practiced without these specific details. The following description and the annexed drawings set forth in detail certain illustrative aspects of the one or more aspects. However, these aspects are exemplary and some of the various methods in the principles of the various aspects may be used and the descriptions described are intended to include all such aspects and their equivalents.

In addition, various aspects and features will be presented by a system that may include a number of devices, components, and / or modules, and the like. The various systems may include additional devices, components, and / or modules, etc., and / or may not include all of the devices, components, modules, etc. discussed in connection with the drawings. It must be understood and recognized.

As used herein, “an embodiment”, “an example”, “aspect”, “an example”, etc., may not be construed as having any aspect or design described being better or advantageous than other aspects or designs. .

In addition, the term “or” is intended to mean an inclusive “or” rather than an exclusive “or”. In other words, unless specified otherwise or unambiguously in context, "X uses A or B" is intended to mean one of the natural implicit substitutions. That is, X uses A; X uses B; Or where X uses both A and B, "X uses A or B" may apply in either of these cases. Also, it is to be understood that the term "and / or" as used herein refers to and includes all possible combinations of one or more of the related items listed.

In addition, the terms "comprises" and / or "comprising" mean that such features and / or components are present, but exclude the presence or addition of one or more other features, components, and / or groups thereof. It should be understood that it does not. Also, unless otherwise specified or in the context of indicating a singular form, the singular in the specification and claims should generally be interpreted as meaning "one or more."

The optical lens manufacturing method and the manufacturing apparatus according to an embodiment of the present invention can manufacture an optical lens using a photo-curing resin (resin) that is cured through a photopolymerization reaction. An optical lens manufacturing apparatus according to an embodiment of the present invention forms a cavity formed along the shape of a lens to be manufactured in a transparent (or translucent) mold. In addition, the optical lens manufacturing apparatus may include a resin injecting unit for injecting a photocurable resin into the cavity. The photocurable resin injected into the cavity by the injection apparatus may include an exposure apparatus that irradiates light (for example, ultraviolet (UV)) that cures the photocurable resin in an exposure process. The photocuring resin injected into the cavity by the light irradiated by the exposure apparatus causes a polymerization reaction to be cured, thereby forming an optical lens.

Types of the photocurable resin used in the optical lens manufacturing method according to an embodiment of the present invention are shown in Table 1 below.

Table 1

Component	division
Component	Radical polymerization type	Cation polymerization type
Oligomer	-Polyester acrylate-Epoxy acrylate-Urethane acrylate-Polyether acrylate-Silicone acrylate	-Alicyclic Epoxy Resin-Glycidyl Ether Epoxy Resin-Epoxy Acrylate-Vinyl Ether
Monomer	Mono- or polyfunctional monomers	-Epoxy monomer-Vinyl ether-Cyclic ether
Photopolymerization Initiator	-Benzoin ethers-amines	-Diazonium salt-Iodonium salt-Sulfonium salt-Metal nocene compound
additive	-Tackifiers, fillers, polymerization inhibitors, etc.	Silane coupling agents

When the monomer of low viscosity is used among the said photocuring resins, the flowability of resin will improve. When manufacturing an optical lens by a conventional plastic resin melt injection method, it is common to use a high viscosity molten plastic. In this case, since the viscosity of the resin is high and the flowability is not good, birefringence may occur during curing (cooling), or an optical lens may be unevenly produced, thereby lowering productivity. However, when using a low viscosity monomer as in one embodiment of the present invention, since the viscosity of the resin is low flowability is improved, these disadvantages can be eliminated.

In addition, in the case of the optical lens manufacturing method using a photocurable resin, all steps of the lens manufacturing process including the curing process of the resin can be performed at room temperature. In this case, the material of the mold used to manufacture the optical lens may use a light and inexpensive material such as transparent plastic, thereby reducing the amount of money invested in the production equipment.

1 is a view showing a hierarchical structure of the lens forming unit 100 of the optical lens manufacturing apparatus according to an embodiment of the present invention.

The hierarchical structure of the lens forming unit 100 shown in FIG. 1 is exemplary, and according to an embodiment of the present invention, only some of the layers shown in FIG. 1 constitute the lens forming unit 100, Layers not shown in FIG. 1 may be added to form the lens forming unit 100.

Although not shown in FIG. 1, as described above, the optical lens manufacturing apparatus may further include other components in addition to the lens forming unit 100. For example, the optical lens manufacturing apparatus may further include an exposure apparatus (not shown) including light sources for irradiating light after the photocuring resin is injected into the lens forming unit 100. In addition, the optical lens manufacturing apparatus may further include a resin injection unit (not shown) for injecting the photocurable resin into the lens forming unit 100.

As shown in FIG. 1, the lens forming unit 100 may include an elastic member layer 110, upper and

lower mold layers

121 and 122, an applied resin layer 130, and a quartz plate layer 140. Can be.

The elastic member layer 110 may be formed using an elastic member that is retracted by an external force and returns to its original shape when the external force is removed. For example, when the elastic member layer 110 receives an external force in the height direction of the lens forming unit 100, the thickness of the elastic member layer 110 may be reduced. The elastic member layer 110 may be formed using a member having elastic force, such as rubber and synthetic rubber. The elastic member layer 110 may be formed using a non-porous member so that the photocurable resin injected into the lens forming unit 100 does not leak.

As shown in FIG. 1, the elastic member layer 110 may form one layer in which all remaining portions of the elastic member layer 110 are formed of the elastic member except for a passage through which resin is introduced. Alternatively, the elastic member layer 110 may be formed to surround the boundary along the boundary of the passage through which the photocurable resin moves in the elastic member layer. For example, the elastic member layer may be formed to surround the boundary of the upper cavity region and the lower cavity region. An embodiment in which the elastic member layer 110 is formed along the boundary of the movement path of the resin is described in more detail in FIG. 2B.

As shown in FIG. 1, the lens forming unit 100 may include an upper mold 121 and a lower mold 122.

The upper mold 121 and the lower mold 122 may include an upper cavity region 121A and a lower cavity region 122B each configured of empty spaces formed along a shape of a lens to be manufactured.

Each of the upper cavity region 121A and the lower cavity region 122A may be connected to a passage through which the photocurable resin is transferred so that the photocurable resin may be injected. The passage through which the photocurable resin is transferred may be referred to as a channel. The portion where the channel is connected to the upper cavity region 121A and the lower cavity region 122A may be referred to as a gate. The gate may have a smaller cross-sectional area compared to the channel.

The upper mold 121 and the lower mold 122 may be composed of a transparent medium or a translucent medium. The upper mold 121 and the lower mold 122 may be formed of a medium capable of transmitting at least a wavelength of light (eg, ultraviolet rays) that promotes a curing process of the photocurable resin.

As shown in FIG. 1, the lens forming unit 100 may further include an applied resin layer 130 and a quartz plate layer 140. The quartz plate layer 140 may be replaced with a glass layer. Similar to the upper mold 121 and the lower mold 122, the applied resin layer 130 and the quartz plate layer 140 may also be composed of a transparent medium or a translucent medium.

Although not shown in FIG. 1, the lens forming unit 100 may include a scattering layer that prevents light (eg, ultraviolet rays) from being concentrated on a portion of the photocurable resin filled in the upper and

lower cavity regions

121A and 122A. It may further include). The scattering layer can be formed, for example, as a layer of adhesive used to bond the quartz layer 140 with another layer. In addition, the scattering layer may be formed of a layer of scattering material, a scattering material coating or scattering tape applied to the lens forming unit 100.

Alternatively, the scattering material may be dispersed in at least one of the upper mold and the

lower mold

121 and 122 without further providing a separate scattering layer.

For simplicity of explanation, only elastic member layer 110 and upper / lower mold layers 121, 122 are shown in FIG. 2A.

As shown in FIG. 2A, an upper cavity region 121A may be formed in the upper mold 121. As described above, the upper cavity area 121A may mean an empty space formed along the shape of the lens to be manufactured. The upper mold 121 may further include a resin injection hole 121B through which the photocurable resin injected from the resin injection portion (not shown) flows. The resin inlet 121B may be referred to as a sprue. In FIG. 2A, the resin inlet 121B is illustrated as being formed in the upper mold 121, but the resin inlet 121B may be formed in the lower mold 122. In addition, the resin injection hole 121B may be formed on the side surface of the lens forming unit 100.

As shown in FIG. 2A, the elastic member layer 110 may be formed between the upper mold 121 and the lower mold 122. In the elastic member layer 110, a channel 110A may be formed to allow resin injected through the resin injection hole 121B to be transferred to the upper cavity region 121A or the lower cavity region 122A.

Although FIG. 2A shows that the channel 110A is formed in the elastic member layer 110, the channel 110A may be formed in various places such as the upper mold 121 or the lower mold 122 according to a design change.

As shown in FIG. 2A, the elastic member layer 110 may be formed as one layer that surrounds the channel through which the photocurable resin moves. The thickness of the elastic member layer 110 may be determined in consideration of the shrinkage ratio of the photocurable resin used for manufacturing the optical lens and the elastic modulus of the material constituting the elastic member layer 110.

The lower mold 122 may include the lower cavity region 122A.

As shown in FIG. 2A, one or more upper or

lower cavity regions

121A and 122B may be interconnected through channel 110A. By sharing the channel 110A, the photocurable resin injected through the one resin injection hole 121B may be injected into the two or more cavity regions through the channel 110A.

In FIG. 2B, the elastic member layer 110 is formed to surround the channel 110A, but there may be no elastic member other than the portion surrounding the channel 110A. As shown in FIG. 2B, the elastic member layer 110 may be formed to surround the portion surrounding the channel 110A and the boundaries of the upper and

lower cavity regions

121A and 122A. As a result, it is possible to prevent unnecessary use of the elastic member and to compress the elastic member layer 110 even with a small external force.

For illustrative purposes, FIG. 3A shows only the connection of two sets of upper and

lower cavity regions

121A and 122A through one channel 110A. The resin layer 130 and quartz layer 140 applied for explanation are omitted, but these layers may be added according to design.

As shown in FIG. 3A, a space in which the photocurable resin injected into the lens forming unit 100 through the resin inlet 121B may be filled in the lens forming unit 100. In the lens forming unit 100, resin may be filled in the resin injection hole 121B and the channel 110A and the upper and

lower cavity regions

121A and 122A.

When the resin injecting unit (not shown) injects the photocuring resin into the lens forming unit 100 through the resin injecting unit 121B, the photocuring resin is transferred in the lens forming unit 110 through the channel 110A. . The transferred photocured resin is filled in the upper and

lower cavity regions

121A and 122A. The channel 110A through which the photocurable resin is transferred may be surrounded by the elastic member layer 110.

In the exposure step to be described later, when the photocurable resin injected into the lens forming unit 100 is exposed and cured, the volume of the photocuring resin injected into the lens forming unit 100 is contracted according to the photopolymerization reaction. In other words, since the total volume decreases as the liquid photocurable resin is cured to a solid state, the volume of the photocurable resins inside the lens forming unit 100 is contracted.

As the volume of the photocurable resin is contracted, voids may be formed in the lens forming unit 100. The void refers to an empty space surrounded by the photocurable resin, and may cause deterioration in optical performance of the optical lens. Therefore, there is a need for an optical lens manufacturing apparatus capable of removing or at least reducing such voids.

In the optical lens manufacturing apparatus according to an embodiment of the present invention, the elastic member layer 110 which is a part of the lens forming unit 110 may be contracted by an external force so as to compensate for the shrinkage phenomenon of the photocurable resin to suppress void formation. Can be.

The external force that contracts the elastic member layer 110 may be a force that compresses the elastic member layer by shrinking the volume of the photocurable resin, or may be a pressure applied to the elastic member layer 110 in the longitudinal direction from the outside. For example, the optical lens manufacturing apparatus according to an embodiment of the present invention may further include a pressing device (not shown) for applying a force to compress the elastic member layer 110 in the height direction. The pressurization device (not shown) may be configured using a spring.

As described above, the thickness of the elastic member layer 110 may be determined based at least in part on the shrinkage ratio of the photocurable resin and the elastic modulus of the elastic member. In other words, the external force applied to the elastic member layer 110 may be calculated while the volume of the photocurable resin is contracted according to the degree of shrinkage of the photocurable resin in the curing process. In addition, according to the elastic modulus of the elastic member constituting the elastic member layer 110, the thickness of the elastic member layer 110 can be determined so that the elastic member layer 110 is compressed to an appropriate degree to prevent the formation of voids in the optical lens. have. For example, the elastic member layer 110 may be designed so that an external force is applied such that the elastic member layer 110 is deformed by about 20% within the elastic range, and in this case, the elastic member layer ( The thickness of 110 can be determined.

3B is a view illustrating a state in which the elastic member layer 110 is compressed by an external force while the photocurable resin is cured.

As shown in FIG. 3B, when the elastic member layer 110 is compressed, the volume of space formed in the lens forming unit 110 is reduced. As the volume of the photocurable resin decreases according to the shrinkage ratio of the photocurable resin, the space formed in the lens forming unit 110 correspondingly decreases, thereby reducing the probability of void formation due to the volume reduction during shrinkage of the photocurable resin. You can.

As described above, when the photocuring resin is injected into the lens forming unit 100 and the photocuring resin is filled in the upper and

lower cavity regions

121A and 122A, the exposure step for curing the photocuring resin may be entered. According to one embodiment of the invention, the resin injection device (not shown) may complete the injection of the resin before entering the exposure step. According to an embodiment, the resin injection device (not shown) may continue to inject the photocurable resin through the resin injection hole 121B even after entering the exposure step.

As described above, when the photocurable resin enters the exposure process and is cured, the total volume of the photocurable resin injected into the lens forming unit 110 is reduced. When the elastic member layer 110 is present, as described above, the elastic member layer 110 may be compressed according to the volume reduction of the photocurable resin to reduce void formation.

However, even in such a case, in order to further reduce the probability of forming voids in the optical lens, the injection of the photocurable resin may be continued in the exposure process to compensate for the volume reduction caused by the shrinkage of the photocurable resin through the newly injected photocurable resin. .

3C is a cross-sectional view of a partial layer structure of a lens forming unit in the optical lens manufacturing apparatus according to another embodiment of the present invention.

As shown in FIG. 3C, the upper mold 121 and the lower mold 122 may be formed only in a portion including the upper cavity region 121A and the lower cavity region 122A. In other words, the upper mold 121 and the lower mold 122 are positioned to form the upper and

lower cavity regions

121A and 122A, and the other regions are the upper portion fixing the upper mold 121 and the lower mold 122. Plate 121C and bottom plate 122C may be located. That is, as shown in FIG. 3C, an accommodating hole for accommodating the upper mold 121 and the lower mold 122, respectively, is formed in the upper plate 121C and the lower plate 122C, and the upper mold ( 121 and the lower mold 122 may be disposed to form the upper cavity region 121A and the lower cavity region 122A.

The upper layer 121C and the lower layer 122C may be made of a material having elastic force.

Since the upper layer 121C and the lower layer 122C are made of a material having elastic force, as the elastic member layer 110 is contracted, the upper layer 121C and the lower layer 122C may be compressed. In other words, as the elastic member layer 110 contracts, pressure is applied to the upper layer 121C and the lower layer 122C, and thus the upper layer 121C and the lower layer 122C may be compressed.

In this case, the gap between the upper mold 121 and the lower mold 122 respectively located in the receiving holes of the upper layer 121C and the lower layer 122C may also be reduced. Therefore, the volume of the upper cavity region 121A and the lower cavity region 122A into which the ultraviolet curable resin is injected is reduced. Accordingly, the optical lens manufacturing apparatus 100 according to the embodiment shown in FIG. 3C may also experience the aforementioned effects due to the introduction of the elastic member layers 121C and 122C.

According to one embodiment of the invention, the use of elastic member layer 110 may be optional. When the lens forming portion 110 that does not include the elastic member layer 110 is used, continuous injection of the photocurable resin may reduce void formation. In another embodiment, air may be injected through the resin inlet 121B. When air is injected through the resin injection hole 121B, the photocurable resins pre-injected into the lens forming unit 100 may move by air. Photocured resins moved by air may move to a space where voids may occur due to shrinkage of the photocurable resin, thereby reducing void formation.

As shown in FIGS. 4A and 4B, the optical lens manufacturing method according to the exemplary embodiment of the present invention may manufacture the optical lens by sequentially exposing the photocurable resin injected into the lens forming unit 100.

As shown in FIG. 4A, when the photocuring resin is injected into the lens forming unit 100 by a predetermined degree or more, the optical lens manufacturing apparatus forms a light shielding mask 150 for selectively exposing the lens forming unit 100. can do. In one embodiment, the optical lens manufacturing apparatus may further include a shielding mask former (not shown) for forming the light shielding mask 150 in the lens forming unit 100.

The optical lens manufacturing apparatus may primarily form a light shielding mask 150 that selectively exposes a position corresponding to the upper cavity region or the

lower cavity region

121A or 122A. As shown in FIG. 4A, the light shielding mask 150 is not formed at the portion where the upper cavity region 121A and the lower cavity region 122B are exposed, and the light shielding mask is formed at the portion where the channel 110A is exposed. 150 may be formed.

In FIG. 4A, the light shielding mask 150 is formed directly on the upper mold 121 and the lower mold 122, but the light shielding mask 150 is designed between the upper mold 121 and the lower mold 122. Depending on the additional layers can be formed.

The shielding mask former (not shown) forming the light shielding mask 150 may be configured by various known methods. In one example, the light shielding mask 150 may be formed of a light shielding film formed of a predetermined pattern. In such a case, a shielding mask former (not shown) may be configured as an apparatus for temporarily attaching such a film to the lens forming unit 100. The shielding mask former may further include an apparatus for removing the first post-exposure light shielding film 150.

In another embodiment, the light shielding mask 150 may be formed of a light shielding paint (or resin) that may block light from a light source (not shown). In such a case, a shielding mask former (not shown) may be composed of an apparatus for applying such paint (or resin) in a predetermined pattern. The shielding mask former may further include an apparatus for removing the applied paint (or resin) from the lens forming unit 100.

As described above, the predetermined pattern means a pattern that exposes only the upper and

lower cavity regions

121A and 122A to the light source and blocks other portions (eg, the channel 110A and / or the resin inlet 121B). can do.

In FIG. 4A, the resin injection hole 121B is shown to be shielded by the light shielding mask 150. However, in the embodiment in which the photocurable resin is continuously injected through the resin injection hole 121B in the exposure process, the resin injection hole 121B is closed. May be exposed to the outside. In other words, the light shielding mask 150 may not be present in at least a portion of the resin inlet 121B so that the resin inlet 121B is continuously connected to the resin injector so that the photocuring resin may be injected.

In FIG. 4A, an exposure apparatus configured to emit light to the lens forming unit 100 at a time from the top and the bottom thereof is illustrated, but the exposure apparatus may be variously changed according to design.

For example, the exposure apparatus may be configured to irradiate light to only one surface of the upper or lower portion of the lens forming unit 100.

In addition, the exposure apparatus may be configured to irradiate light only to at least a portion of the lens forming unit 100 at a time. When the exposure apparatus does not irradiate light to the entire portion of the lens forming unit 100 at one time, and can only irradiate light to a portion thereof, the exposure apparatus and the lens forming unit 100 may be configured to move relative to each other. have. In this case, at least one of the exposure apparatus or the lens forming unit 100 may be provided with a transfer unit (not shown) for relatively moving the exposure apparatus and the lens forming unit 100. An exposure method for relatively shifting the exposure apparatus and the lens forming unit 100 will be described in detail with reference to FIGS. 5 and 6.

In another embodiment, the exposure apparatus may be configured to gradually light at least some of the two or more light sources included in the exposure apparatus. According to an exemplary embodiment, the exposure apparatus may first light a light source at a position where light may be irradiated to a portion exposed by the light shielding mask 150. After the light shielding mask 150 is removed, the exposure apparatus may subsequently light up the remaining light sources.

4A, the first exposure may be started with at least a portion of the lens forming unit 100 exposed by the light shielding mask 150. The upper cavity region 121A and the lower cavity region 122A exposed by the light shielding mask 150 by the primary exposure may be primarily cured.

When the upper cavity region 121A and the lower cavity region 122A are primarily cured, shrinkage by photopolymerization starts as described above. The photocurable resins in the upper cavity region 121A and the lower cavity region 122A forming the optical lens shrink as they are cured. At this time, an uncured photocurable resin exists in a region (eg, the channel 110A) that is not exposed by the light shielding mask 150. When the resin in the

cavity regions

121A and 122A shrinks while being cured, if the photocurable resin in the channel 110A is also cured at the same time, the resin cannot be supplemented with the

cavity regions

121A and 122A, so that the cavity regions ( There is a possibility of voids in the cured resins in 121A, 122A). However, when some regions are left unexposed through the light shielding mask 150, the empty space is not exposed as much as the photocurable resin in the

cavity regions

121A and 122A is contracted (eg, a channel). The photocurable resin in 110A) may be transferred and replenished. Thus, in this case, voids are prevented from being formed in the photocurable resin in the

cavity regions

121A and 122A, which are later optical lenses, and the voids are formed in the gate (connection portion of the cavity regions and the channel) or channel. can do.

As shown in FIG. 4B, when the first exposure step is completed, the light shielding mask 150 may be removed from the lens forming unit 100.

The light shielding mask 150 may be physically and / or chemically removed from the lens forming unit 100. For example, when the light shielding mask 150 is a light shielding film, the light shielding mask may be physically removed by peeling off the light shielding film. Alternatively, when the shielding mask 150 is a light shielding paint (or resin), the light shielding mask 150 may be removed from the lens forming unit 100 by being physically and / or chemically cleaned or scraped off.

As shown in FIG. 4B, after the light shielding mask 150 is removed, the optical lens manufacturing apparatus may second expose the lens forming unit 100. By the second exposure, the photocuring resins positioned in the gate and the channel sprue are all cured, and finally, the cured resin may be ready to be taken out from the lens forming unit 100.

As shown in FIG. 5, the exposure apparatus and the lens forming unit 100 may be configured to move relative to each other. When the exposure apparatus is turned on, the exposure apparatus may be configured to irradiate light to at least a portion of the lens forming unit 100. In this case, at least one of the exposure apparatus and / or the lens forming unit 100 may include a transfer apparatus, and may move relative to each other by the transfer apparatus.

Although the lens forming part is placed in the horizontal direction and the light source is irradiated vertically in FIG. 5, the light irradiation angle of the light source and the position of the light source may be changed according to design.

In an embodiment of the present invention illustrated in FIG. 5, two or more lens cavity regions (including upper and lower cavity regions) are shown to be positioned at the same height, but the lens cavity included in the lens forming unit 100. The heights of the regions may differ from one another. An embodiment related to this will be described in more detail with reference to FIG. 6.

As illustrated in FIG. 6, the lens forming unit 100 may be formed such that two or more lens cavity regions formed in the lens forming unit 100 have different height levels. In FIG. 6, the lens forming unit 100 is erected vertically, and the lens cavity regions included in the lens forming unit 100 are arranged along the height direction, but the lens forming unit according to the embodiment of the present invention ( 100) is not limited thereto. For example, the lens forming unit 100 may be formed such that two or more cavity regions in the lens forming unit 100 have different height levels while forming an inclined surface. In another example, the lens forming unit 100 may not be flat, and may be formed in any shape such that the cavity areas in the lens forming unit 100 have different height levels.

'Height level' may mean a height above the lens cavity regions vertically. Two or more lens cavity regions with the same height from vertically upward may be referred to as having the same height level.

As shown in FIG. 6, the lens cavity regions included in the region C may be referred to as having the same height level. The lens cavity regions included in the D region may be referred to as all having the same height level. The lens cavity regions included in the D region may be referred to as having a higher height level than the lens cavity regions included in the C region.

In the optical lens manufacturing apparatus according to the exemplary embodiment of the present disclosure, the exposure apparatus (not shown) may cure the photocurable resins filled in the lens forming unit 100 while moving relative to the lens forming unit 100. In this case, the exposure apparatus (not shown) may be moved relative to expose the lens cavity region having the lower height level among the two or more lens cavity regions first.

For example, the exposure apparatus (not shown) emits light first to the lens cavity regions in the C region, and after sufficient time passes, the lens forming unit 100 to irradiate light to the lens cavity regions in the D region. You can move with. In another embodiment, the exposure apparatus (not shown) may be fixed, and the lens forming unit 100 may move relative.

In an exemplary embodiment, the exposure apparatus (not shown) may be exposed in order from the lens cavity areas having the lowest height level among the lens cavity areas in the lens forming unit 100 to the lens cavity areas having the highest height level. Can move sequentially.

When the exposure apparatus (not shown) and the lens forming unit 100 move relative to each other, the exposure apparatus (not shown) and the lens forming unit 100 may move relative to each other at a predetermined speed. Here, the predetermined speed may be set slow enough to ensure sufficient exposure time for the photocurable resins in the cavity region having the same height level currently being exposed by the exposure apparatus (not shown) to cure. In another embodiment, the exposure apparatus (not shown) and the lens forming unit 100 may pause during relative movement. For example, the exposure apparatus (not shown) and the lens forming portion can ensure sufficient exposure time for the photocuring resins in the cavity area having the same height level currently being exposed by the exposure apparatus (not shown) to cure. 100 may stop the relative movement for a certain time.

As illustrated in FIG. 6, two or more lens cavity regions formed in the lens forming unit 100 may be connected to each other through a channel. The channels connecting the two or more lens cavity regions may be formed such that resin is injected into the lens cavity region having the low height level through the lens cavity region having the high height level.

For example, as shown in FIG. 6, the lens cavity regions may be connected to the lens cavity regions located at a height level higher than the channel through the channel. However, the lens cavity regions may also be connected to the lens cavity regions located at a height level two or more levels higher than the lens cavity regions. For example, the lens cavity regions located at the height level D may be connected to other lens cavity regions having a higher height level than the lens cavity regions located at the height level C.

FIG. 6 illustrates an embodiment in which a chain of lens cavity regions is formed in a vertical direction by being connected through a channel with lens cavity regions directly above it. However, depending on the design, the lens cavity areas may be connected to the lens cavity areas located at positions other than their vertically upwards. Depending on the design, a channel may be further formed for connecting the lens cavity regions having the same height level.

Although channels formed in a straight line are illustrated in FIG. 6, the channels interconnecting two or more lens cavity regions may be formed in various shapes according to a design. For example, various types of channels may be formed, such as spiral channels and curved channels. The channels generally connect two lens cavity regions, but may optionally interconnect three or more lens cavity regions.

The resin inlet for injecting the resin into the lens forming unit 100 may be formed at various positions. For example, the resin injection hole may be formed at the top of the lens forming unit 100 to be directly connected to the lens cavity regions having the highest height level. In another embodiment, the resin injection hole may be formed at the stop portion or the bottom end of the lens forming portion 100, not at the top. The resin inlet may be connected to one cavity region. Depending on the design, one resin inlet and two or more cavity regions may be connected.

In one embodiment, when the resin inlet and the lens cavity regions are remote, an extended channel connecting the resin inlet and the lens cavity regions may be formed.

When the photocurable resin is injected into the lens forming unit 100 through the resin injection hole, the photocurable resin is injected into the lens cavity region directly connected to the resin injection unit. The photocurable resin injected into the lens forming unit 100 may transfer the lens cavity area connected to the resin injection part and another lens cavity area connected through the channel.

The photocurable resin may be filled through the lens cavity regions existing in the lens forming unit 100 and the channels interconnecting them.

As described above, in the exposing step, the exposure apparatus (not shown) may first expose the lens cavity regions having the lower height level among the two or more lens cavity regions having the different height levels.

When the lens cavity regions having lower height levels are exposed, shrinkage reactions due to photopolymerization can occur as described above. At this time, the lens cavity region having a higher height level has not yet been exposed, and thus the photocurable resin filled in these lens cavity regions may be in a liquid state without being exposed.

In this case, the photocurable resin filled in the lens cavity region having the higher height level tries to be transferred downward by gravity, and can be transferred to the lens cavity region having the lower height level through the channel. When the volume of the photocurable resin present in the lens cavity region having the lower height level is reduced, a space is created for the photocurable resin present in the lens cavity region having the higher height level to be introduced into the created space. The introduced photocurable resin fills the space. Due to this, it is possible to reduce the possibility of occurrence of voids that may be formed in the lens cavity region.

As shown in FIG. 6, the exposure apparatus may expose the D region first, and then sequentially expose the C region and other lens cavity regions having a higher height level.

In the sequential exposure step, resin may be continuously injected into the lens forming unit 100 through the resin inlet.

In other embodiments, the exposure apparatus may determine the exposure order by other factors than the height level.

For example, the lens cavity regions present in the lens forming unit 100 may be classified by topology with the resin inlet. For example, the lens cavity areas directly connected to the resin inlet are 1 hop distance, the lens cavity areas connected through the one lens cavity area between the resin inlet and the lens cavity area are 2 hops away, the resin inlet and the lens The lens cavity regions connected through the n lens cavity regions between the inlets may be referred to as being at n + 1 hop distance.

In this case, the exposure apparatus may perform the exposure step in order from the lens cavity regions at the higher hop distance to the lens cavity regions at the lower hop distance.

In this case, the curing of the photocurable resin first begins in the lens cavity regions at higher hop distances, and the lens at a higher hop distance from the lens cavity regions at lower hop distances of the resin that has not yet been cured. Can move in the order of the cavity areas.

Two or more lens cavity regions simultaneously exposed at the same time do not necessarily have the same hop distance, and lens cavity regions having different hop distances may be simultaneously exposed, depending on the topological relationship with the resin injection hole.

In this case, the resin may be continuously introduced into the lens forming unit 100 through the resin inlet in the exposure step, and due to the pressure generated by the resin being continuously introduced, the resin in the uncured state may have a lower hop distance. It may move in the order of the lens cavity areas at a higher hop distance from the lens cavity areas at.

The phase relationship between the lens cavity regions interconnected in the lens forming unit 100 may be set based on other lens cavity regions other than the lens cavity region in which the resin injection hole 121B (sprue) exists. For example, any lens cavity region not directly connected to the resin inlet 121B may be set to be in the zero hop position. Similar to the above, the lens cavity regions directly connected through any lens cavity region (zero hop) and the channel are connected through one lens cavity region between the lens cavity region (zero hop) and the lens cavity region. The connecting lens cavity regions may be defined as being two hops away.

As described above, the lens cavity regions in the lens forming unit 100 may be sequentially exposed in order from the high hop number lens cavity region to the low hop number lens cavity region. In this case, the photocuring resins located in the lens cavity regions having a low hop number may be moved to the lens cavity regions having a high hop number, thereby reducing the possibility of void formation.

In this case, the lens cavity regions defined as zero hops may have a relatively larger volume than other lens cavity regions.

Or a separate space (resin reserve) created to store the photocurable resin, rather than the lens cavity region, is defined as 0 hops, and as described above, from the high hop number lens cavity region to the low hop count. The lenses may be sequentially exposed in the lens cavity region.

As illustrated in FIG. 7, the optical lens manufacturing apparatus 100 may include an upper core 121 and a lower core 122 forming the

lens cavity regions

121A and 122A. The upper core 121 and the lower core 122 may have a cylindrical shape and may be inserted into the upper plate 121C and the lower plate 122C, respectively. However, the shapes of the upper core 121 and the lower core 122 shown in FIG. 7 are exemplary, and according to the shape and size of the lens to be manufactured, the upper core 121 and the lower core 122 may have various shapes. I can have it. For example, it may have various shapes such as a cuboid, a cone, and a hemisphere forming the

lens cavity regions

121A and 122A.

The upper plate 121C and the lower plate 122C may have a receiving groove capable of receiving the upper core 121 and the lower core 122. The accommodation groove may be formed to correspond to the shape of the upper core 121 or the lower core 122. For example, the receiving groove formed in the upper plate 121C may be formed as an aperture having the outer surface of the upper core 121 as the inner diameter. The receiving groove formed in the lower plate 122C may be formed as an opening having an inner surface of the outer surface of the lower core 122. When the receiving grooves formed in the upper plate 121C and the lower plate 122C, respectively, are formed as openings formed in accordance with the outer surfaces of the upper core 121 and the lower core 122, the upper core 121 and the lower core 122 are formed. May be fitted to the upper plate 121C and the lower plate 122C, respectively. The upper plate 121C and the lower plate 122C may be formed to align and fix the upper core 121 and the lower core 122, respectively.

Both the upper plate 121C and the lower plate 122C may be made of a material capable of transmitting light having a wavelength capable of curing the photocurable resin. For example, when using an ultraviolet curable resin, both the upper plate 121C and the lower plate 122C may be made of a material capable of transmitting ultraviolet rays.

In order to keep the optical axes of the upper cavity region 121B and the lower cavity region 122B aligned, a fixing column (not shown) is provided in the lower plate 122C, and a fixing groove (not shown) is formed in the upper plate 121C. ) May be formed respectively. That is, fixing columns (not shown) and fixing grooves (not shown) may be formed to fix the relative positions of the upper plate 121C and the lower plate 122C. The shape of the fixing column (not shown) and the fixing groove (not shown) may have any shape for fixing the upper plate 121C and the lower plate 122C. 7 shows four pairs of fixed columns (not shown) and fixed grooves (not shown), however, any number of pairs of fixed columns (not shown) and fixed grooves (not shown) may be present. For example, there may be a pair of two fixing columns (not shown) and fixing grooves (not shown) in the diagonal direction. Or a pair of four or more fixed columns (not shown) and fixed grooves (not shown).

As shown in FIGS. 1 to 6, an elastic member 110 may exist between the upper mold 121 and the lower core 122. The elastic member 110 may be present between the upper mold 121 and the lower core 122.

Meanwhile, as shown in another embodiment illustrated in FIG. 7, the lens manufacturing apparatus 100 may not include a separate elastic member 110 or a layer made of an elastic member.

Instead, the lens manufacturing apparatus 100 may configure any portion surrounding the upper cavity region 121B and the lower cavity region 122B with an elastic material to perform the role of the elastic member 110 described above. Can be. For example, the upper cavity region 121B and the lower cavity region 122B include an inner wall of the receiving groove formed in the upper core 121, the lower core 122, the gate, and the upper plate 121C, and the lower plate 122C. It may be surrounded by the inner wall of the receiving groove formed in. In an alternative embodiment, the lens manufacturing apparatus 100 is formed in the upper core 121, the lower core 122, the gate, and the upper plate 121C surrounding the upper cavity region 121B and the lower cavity region 122B. At least any portion of the inner wall of the receiving groove and the inner wall of the receiving groove formed in the lower plate 122C may be formed as the elastic portion 110 ′.

When any part surrounding the upper cavity region 121B and the lower cavity region 122B is made of an elastic material, when the photocurable resin shrinks during the curing process, the elastic part contracts while the upper cavity region 121B is contracted. And a volume in the lower cavity region 122B. Due to this, the possibility of voids in the manufactured lens can be reduced.

The elastic portion 110 ′ may be formed to surround at least a portion of an extension line of the outer surface of the upper core 121 or the lower core 121, for example. As shown in FIG. 7, the upper core 121 and the lower core 122 may be disposed up and down with the center axis aligned. Here, when the outer surface of the upper core 121 or the lower core 122 is extended, the upper core 121 and the lower core 122 have the same diameter as that of the upper core 121 or the lower core 122. A virtual cylindrical space can be formed with the length between them as the height. The elastic portion 110 ′ may be formed to surround at least a portion of the cylindrical space.

In FIG. 7, the upper core 121 and the lower core 122 are formed in a cylindrical shape, and thus, a virtual shape formed by the extension lines of the outer surfaces thereof is also formed in a cylindrical space, but this is exemplary. That is, the virtual shape formed by the extension line of the outer surface of the upper core 121 or the lower core 122 may have a variety of shapes according to the shape of the upper core 121 or the lower core 122. . For example, the imaginary shape formed by the extension line of the outer surface of the upper core 121 or the lower core 122 may have a multi-sided columnar shape.

In the embodiment shown in FIG. 7, the elastic portion 110 ′ surrounds the rest of the cylinder space existing between the upper core 121 and the lower core 122 except for the gate portion that is connected to adjacent cavity regions. It can be formed to be. In addition, the elastic portion 110 ′ may be formed to enclose a moving path of the photocurable resin such as a gate and a runner. That is, the elastic portion 110 ′ may be formed to extend upward from the lower plate 122C so as to surround a space where the photocurable resin passes through the lower plate 122C.

As shown in FIG. 7, the elastic portion 110 ′ may be formed by extending the lower plate 122C vertically upward. The elastic portion 110 ′ formed separately from the lower plate 122C has a structure substantially the same as the embodiment described above in FIG. 2B.

7 illustrates an embodiment in which the elastic portion 110 ′ is formed to extend from the lower plate 122C, but the elastic portion 110 ′ may be formed to extend from the upper plate 121C. That is, the elastic portion 110 ′ may extend downward from the upper plate 121C, and the elastic portion 110 ′ may be formed to surround a movement path through which the photocurable resin moves in the lens manufacturing apparatus 100. .

The height of the elastic portion 110 ′ may be determined in a similar manner to the height of the elastic member 110 described above. That is, according to the elastic force of the elastic material constituting the elastic portion 110 ′, an appropriate height may be selected to reduce the void of the lens manufactured by the lens manufacturing apparatus 100. The height of the elastic portion 110 ′ may mean a height protruding downward or upward from the upper plate 121C or the lower plate 122C. The height of the elastic portion 110 ′ shown in FIG. 7 may be exaggerated. That is, depending on the design, the actual height of the elastic portion 110 ′ may have a height that is difficult to visually observe. For example, the elastic portion 110 ′ may have any height of 500 μm or less.

The elastic portion 110 ′ may be formed of any material having elastic force. The elastic portion 110 ′ may be formed of a separate material from the lower plate 122C. Alternatively, the elastic portion 110 ′ may be formed integrally with the same material as the lower plate 122C.

As shown in FIG. 8, an elastic portion 110 ′ may be formed in the lower plate 122C. The elastic portion 110 ′ may be formed to surround a path through which the photocurable resin moves in the lower plate 122C so that the photocurable resin does not leak outside the upper cavity region 121B and the lower cavity region 122B. have. In addition, the elastic portion 110 ′ may be formed to maintain the same overall height.

As shown in FIG. 9, the upper core 121 may be accommodated in a receiving groove accommodated in the upper plate 121C, and its position may be fixed. As shown in FIG. 9, a movement path (channel, runner, gate, etc.) through which the photocuring resin moves may be formed only in the lower plate 122C.

In other words, the movement path of the photocurable resin is formed only in the lower plate 121C by forming the moving passage in the lens manufacturing apparatus 100 of the photocurable resin in the parting surface (the upper plate 121C and the lower plate 122C). Physically separated surface).

As shown in FIG. 10, the upper core 121 and the lower core 122 may be accommodated and aligned in the receiving grooves of the upper plate 121C and the lower plate 122C, respectively.

As shown in FIG. 10, the elastic portion 110 ′ is formed not only in the upper cavity region 121A and the lower cavity region 122A in which the actual lens is formed, but also around the channel 110A through which the photocurable resin passes. . The elastic part 110 ′ is formed to completely surround a passage through which the photocurable resin moves in the lens manufacturing apparatus 100, thereby preventing leakage of the photocurable resin. Since the elastic portion 110 ′ is formed of a material having elasticity, even when there is a manufacturing step between the upper plate 121C and the lower plate 122C, the elastic portion 110 ′ is disposed between the upper plate 121C and the lower plate 122C. Close contact can prevent the photocuring resin from leaking.

When the photocurable resin is injected through the resin inlet, the photocurable resin may be filled in the channel 110A, the upper cavity region 121A, and the lower cavity region 122A through which the photocurable resin passes.

When the photocuring process is started, the photocuring resin filled in the channel 110A, the upper cavity region 121A, and the lower cavity region 122A may shrink. Accordingly, the elastic portion 110 ′ may be contracted together by receiving an external force in the height direction. For this reason, the volume of the resin-filled portion inside the lens manufacturing apparatus 100 may be reduced, thereby reducing the probability of void formation in the lens.

As described above, the upper core 121, the lower core 122, the upper plate 121C, and the lower plate 122C may all be made of a material capable of passing light capable of curing the photocurable resin. . For example, the upper core 121, the lower core 122, the upper plate 121C, and the lower plate 122C may all be made of a transparent material.

When the resin injection is completed, as described above, part of the lens manufacturing apparatus 100 is masked and sequentially exposed, or the lens manufacturing apparatus 100 and the light source move relative to each other, so that the cavity regions in the lens manufacturing apparatus 100 are sequentially Can be exposed.

It is to be understood that the specific order or hierarchy of steps in the processes presented is an example approach. Based on design priorities, it is also to be understood that the specific order or hierarchy of steps in the processes may be rearranged within the scope of the present invention. The accompanying method claims present elements of the various steps in an exemplary order, but are not meant to be limited to the specific order or hierarchy presented.

The description of the presented embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the scope of the invention. Thus, the present invention should not be limited to the embodiments set forth herein but should be construed in the broadest scope consistent with the principles and novel features set forth herein.

As described above, related contents have been described in the best mode for carrying out the invention.

The present invention can be used in the field of optical lens manufacturing.

Claims

As an optical lens manufacturing apparatus,

An upper mold in which at least one upper cavity region is formed to form an optical lens;

A lower mold in which at least one lower cavity region for forming the optical lens is formed; And

It includes an elastic member formed between the upper mold and the lower mold,

Optical lens manufacturing apparatus.
The method of claim 1,

The elastic member,

It is formed to surround the boundary of the upper cavity area and the lower cavity area,

Optical lens manufacturing apparatus.
The method of claim 2,

The elastic member,

A gate formed to allow resin to be injected into at least one of the upper cavity region and the lower cavity region,

Optical lens manufacturing apparatus.
The method of claim 1,

After resin is injected into at least one of the upper cavity region and the lower cavity region,

Further comprising a pressing device for applying a force to press the elastic member,

Optical lens manufacturing apparatus.
The method of claim 1,

The thickness of the elastic member,

Determined based at least in part on the shrinkage ratio of the photocurable resin used in the optical lens manufacturing apparatus, the elastic modulus of the elastic member,

Optical lens manufacturing apparatus.
The method of claim 1,

At least one of the upper mold and the lower mold,

The scattering agent which can scatter ultraviolet rays is dispersed,

Optical lens manufacturing apparatus.
The method of claim 1,

Further comprising an optical layer capable of scattering ultraviolet light,

Optical lens manufacturing apparatus.
As an optical lens manufacturing method,

Placing an upper mold in which at least one upper cavity region is formed to form an optical lens

Disposing a lower mold in which at least one lower cavity region for forming an optical lens is formed; And

Disposing an elastic member between the upper mold and the lower mold,

Optical lens manufacturing method.
As an optical lens manufacturing apparatus,

An upper core in which at least one upper cavity region for forming an optical lens is formed;

A lower core in which at least one upper cavity region for forming the optical lens is formed; And

An elastic portion formed to surround at least a portion of an extension line of an outer surface of the upper core or the lower core,

Optical lens manufacturing apparatus.
The method of claim 9,

Further comprising a plate formed with a receiving groove for receiving and aligning the upper core or lower core,

The elastic portion,

Is formed extending from the plate,

Optical lens manufacturing apparatus.
The method of claim 9,

The elastic portion,

In the optical lens manufacturing apparatus is formed so as to enclose the path that the photocurable resin is moved,

Optical lens manufacturing apparatus.
As an optical lens manufacturing method,

Forming a light shielding mask for selectively exposing a mold for manufacturing an optical lens having at least one lens cavity region formed thereon;

Firstly exposing a region selectively exposed by the light shielding mask of the mold for manufacturing the optical lens;

Removing the light shielding mask; And

Secondary exposure to the mold for manufacturing the optical lens,

Optical lens manufacturing method.
The method of claim 12,

The first exposing includes placing and exposing a light source so that light is irradiated in a direction relative to a direction in which resin is injected into the cavity area.

Optical lens manufacturing method.
The method of claim 12,

The mold for manufacturing the optical lens,

And an elastic member disposed to be compressed as the photocurable resin injected into the lens cavity region is cured and contracted.

Optical lens manufacturing method.
The method of claim 14,

Further comprising the step of applying an external force so that the mold for manufacturing the optical lens is pressed in the vertical direction,

Optical lens manufacturing method.
The method of claim 12,

At least one of the first exposure step and the second exposure step,

And sequentially illuminating two or more light sources for exposing ultraviolet rays to the mold for manufacturing the optical lens,

Optical lens manufacturing method.
The method of claim 12,

At least one of the first exposure step and the second exposure step,

And exposing the light source and the mold for manufacturing the optical lens to move relative to each other.

Optical lens manufacturing method.
As an optical lens,

Forming a light shielding mask for selectively exposing a mold for manufacturing an optical lens having at least one lens cavity region formed thereon;

Firstly exposing a region selectively exposed by the light shielding mask of the mold for manufacturing the optical lens;

Removing the light shielding mask; And

Secondary exposure to the mold for manufacturing the optical lens,

Produced by an optical lens manufacturing method,

Optical lens.
As an optical lens manufacturing apparatus,

A lens manufacturing mold having at least two lens cavity regions interconnected through a resin injection channel therein and having a resin injection hole for injecting resin into the lens cavity region;

A light source for exposing a light beam with the lens manufacturing mold; And

A transfer device for relatively moving the lens manufacturing mold and the light source to sequentially expose the two or more lens cavity regions,

Optical lens manufacturing apparatus.
The method of claim 19,

The two or more lens cavity regions,

Comprising two or more lens cavity regions having different height levels from each other,

Optical lens manufacturing apparatus.
The method of claim 20,

The transfer device,

Relatively shifting the light source and the lens manufacturing mold such that a lens cavity region having a lower height level among the two or more lens cavity regions is first exposed;

Optical lens manufacturing apparatus.
The method of claim 21,

The transfer device,

Of the two or more lens cavity regions,

Relatively shifting the light source and the lens manufacturing mold to sequentially expose the lens cavity regions having the lowest height level from the lens cavity regions having the highest height level;

Optical lens manufacturing apparatus.
The method of claim 20,

The resin inlet and the resin injection channel,

Resin is injected into the lens cavity region having a low height level through the lens cavity region having a high height level of the two or more lens cavity regions,

Optical lens manufacturing apparatus.
The method of claim 23, wherein

The resin inlet,

Is formed to inject resin into the lens cavity region having the highest height level among the two or more lens cavity regions,

The resin injection channel,

Formed to interconnect two or more lens cavity regions having an adjacent height level difference among the two or more lens cavity regions,

Optical lens manufacturing apparatus.
The method of claim 19,

The transfer device,

Such that the exposure state for one or more lens cavity areas of the two or more lens cavity areas lasts for a predetermined time period,

To pause the relative movement of the light source and the mold for manufacturing the lens,

Optical lens manufacturing apparatus.
The method of claim 19,

The transfer device,

Such that the exposure state for one or more lens cavity areas of the two or more lens cavity areas lasts for a predetermined time period,

Relatively moving the light source and the mold for manufacturing the lens at a predetermined speed;

Optical lens manufacturing apparatus.
The method of claim 19,

The transfer device,

Relatively shifting the lens manufacturing mold and the light source to sequentially expose lens cavity regions remote from the resin inlet of the two or more lens cavity regions,

Optical lens manufacturing apparatus.
As an optical lens manufacturing method,

Forming at least two lens cavity regions interconnected through a resin injection channel in a lens manufacturing mold and a resin inlet for injecting resin into the lens cavity region;

Injecting resin into the two or more lens cavity regions through the resin inlet; And

Sequentially exposing the two or more lens cavity regions,

Optical lens manufacturing method.