Method for manufacturing a molded lens, molded lens, and molding die

Abstract

To provide a method for manufacturing a molded lens, the molded lens, and a molding mold that improve mold releasability and enable miniaturization of the molded lens.SOLUTION: In a method for manufacturing a molded lens in which a lens part 2-1 and a non-lens part 2-2 on an outer periphery of the lens part are formed of a photocurable resin, the molded lens has the lens part and the non-lens part bonded to a base material with an optical function. The method for manufacturing the molded lens includes the steps of: supplying the photocurable resin to a molding mold 2; bonding the photocurable resin and the base material with the optical function inside the molding mold; and releasing the molded lens from the molding mold. The molded lens is characterized in that a stepped portion is formed in the non-lens part of the molding mold.SELECTED DRAWING: Figure 4

Description

Technical Field

[0001] The present invention relates to a method for manufacturing a molded lens for improving moldability, a molded lens, and a molding die.

Background Art

[0002] A lens unit in which a plurality of lenses are incorporated in a lens barrel is incorporated in, for example, a mobile terminal or an in-vehicle imaging module. As types of lenses, there are glass lenses and resin (plastic) lenses. In addition, as a lens combining glass and resin in consideration of weight reduction, productivity, durability, etc., hybrid lenses in which a photocurable resin is bonded to the surface of glass are also increasing.

[0003] Injection molding, UV curing, LIM molding, etc. are used to manufacture lenses using a mold. In a molded lens, in order to manufacture a highly accurate lens, molding is performed with improved transferability, but accordingly, the mold release property deteriorates.

[0004] For example, Patent Document 1 describes an improvement in mold release property on at least the mold surface (particularly, the bottom surface of the mold cavity) that contacts the resin of the mold. Further, Patent Document 2 describes an improvement in mold release property without increasing the man-hours before and after molding.

Prior Art Documents

Patent Documents

[0005]

Patent Document 1

Patent Document 2

Summary of the Invention

Problems to be Solved by the Invention

[0006] However, generally, mold release property, which is likely to be a problem in molded products using a mold, is often a problem also in molded lenses.

[0007] Compared with a glass lens, a resin-molded lens has a large change in the shape of the lens surface over time. When the shape of the lens surface changes, for example, the focal length changes, and there is a problem that the optical performance of the lens unit deteriorates.

[0008] In photo-curable molding, when considering optical performance, it is necessary to provide an excess area (non-lens part) on the outer peripheral part of the aspherical effective part of the lens part. This is for the purpose of replenishing resin from the non-lens part to avoid a shortage of the resin amount in the lens part and poor transferability when the photo-curable resin cures and shrinks. Also, when dropping the photo-curable resin, equipment such as a dispenser is used to control the variation in quantity, but since it cannot be completely controlled, the non-lens part is used as an area to cover the variation between shots. Furthermore, when photo-curing, since the volume of the photo-curable resin decreases by the amount of shrinkage of the photo-curable resin, good molding can be achieved by supplying external air from between the substrate having an optical function and the mold for lens molding. Also, the supply amount of the resin in the non-lens part must be less than 100% of the volume set in the molding die. This is because if the photo-curable resin is evenly supplied up to the outer peripheral part of the non-lens part, air will be supplied from the outside by the amount of shrinkage of the photo-curable resin when it cures, and this phenomenon will result in bubbles appearing inside the lens (either the non-lens part or the lens part). In the following description, in order to distinguish between the lens part and the non-lens part of the molded lens and the lens part and the non-lens part of the molding die, the lens part and the non-lens part of the molded lens are described as the molded lens part and the molded non-lens part, and the lens part and the non-lens part of the molding die are described as the die lens part and the die non-lens part.

[0009] When it is desired to miniaturize the molded lens, this excess area becomes a bottleneck, molding limiting the miniaturization of the size of the outer diameter (or outer shape) of the substrate having an optical function for closely attaching the lens part. If the size of the molding die is unreasonably reduced, air bubbles will be induced and the molded lens will become a defective product.

[0010] In view of the above circumstances, the present invention provides a method for manufacturing a molded lens, a molded lens, and a molding die, which improve the releasability of the molded lens, make it difficult for air bubbles to be mixed into the interior of the molded product when the photocurable resin is cured even when the photocurable resin is supplied up to the outer peripheral limit of the molding die, and enable miniaturization of the molded lens.

Means for Solving the Problems

[0011] A method for manufacturing a molded lens according to one aspect of the present invention for solving the above problems is a method for manufacturing a molded lens in which a lens portion for refracting light and a non-lens portion on the outer periphery of the lens portion are formed of a photocurable resin. In the method, the lens portion and the non-lens portion are a molded lens joined to a substrate having an optical function, and the method includes a step of supplying the photocurable resin to a molding die having a corresponding shape to the lens portion and the non-lens portion, a step of joining the photocurable resin and the substrate having an optical function inside the molding die, and a step of releasing the molded lens from the molding die. The method is characterized in that a [specific structure] is formed in the non-lens portion of the molding die. molding lens portion and the molding non-lens portion on the outer periphery of the molding lens portion are formed of a photocurable resin. In the method for manufacturing a molded lens, the molding lens portion and the molding non-lens portion are a molded lens joined to a substrate having an optical function, and the molding lens portion and the molding non-lens portion are provided with a respectively corresponding shape of having a die lens part and a die non-lens part a molding die, a step of supplying the photocurable resin to the molding die, a step of joining the photocurable resin and the substrate having an optical function inside the molding die, and a step of curing the molded lens part with light rays before curing the light-curable molded non-lens part with light rays, and a step of curing the molded non-lens part with the light rays a step of releasing the molded lens from the molding die 、 and having a [specific structure] formed in the die non-lens portion of the molding die. convex part a [specific structure] is formed and and a concave part reaching the outermost circumference of the die non-lens part in the radial direction is formed outside the convex part in the die non-lens part of the molding die. Let the distance from the center of the molding die to the outermost circumference of the die lens part be X1, the distance from the center of the molding die to the outermost circumference of the die non-lens part be X2, and when X3 is defined by the following mathematical formula (1), the position outside the convex part formed in the die non-lens part is located inside X3 is characterized in that it is a method for manufacturing a molded lens. (X2 - X1) ÷ 2 = X3 Mathematical formula (1)

[0012] The photocurable resin is an ultraviolet curable resin that cures with light rays in the range of 300 nm to 400 nm, and is characterized in that it is a method for manufacturing a molded lens. the The photocurable resin is an ultraviolet curable resin that cures with light rays in the range of 300 nm to 400 nm, and is characterized in that it is a method for manufacturing a molded lens.

[0013] The substrate having an optical function has a function of transmitting light wavelengths in the range of 300 nm to 400 nm, and the method for manufacturing a molded lens is characterized in that the photocurable resin is joined to the surface of the substrate having an optical function.

[0014] The molded lens according to one aspect of the present invention that solves the above problems is for refracting light molding a lens part and the molding non-lens part on the outer periphery of the molding lens part are formed of a photocurable resin. In the molded lens, the molding lens part and the molding non-lens part are a molded lens joined to a substrate having an optical function. The the molding non-lens part of the molded lens concave part is formed with and a convex part reaching the outermost circumference of the molded non-lens part in the radial direction is formed outside the concave part in the molded non-lens part of the molded lens. Let the distance from the center of the molded lens to the outermost circumference of the molded lens part be X1, the distance from the center of the molded lens to the outermost circumference of the molded non-lens part be X2, and when X3 is defined by the following mathematical formula (1), the position outside the concave part formed in the molded non-lens part is located inside X3 the molded lens being characterized in that. (X2 - X1) ÷ 2 = X3 Mathematical formula (1)

[0015] The photocurable resin is an ultraviolet curable resin that cures with light rays of 300 nm to 400 nm, the molded lens being characterized in that.

[0016] The substrate having an optical function has a function of transmitting light wavelengths of 300 nm to 400 nm, and the photocurable resin is joined to the surface of the substrate having an optical function, the molded lens being characterized in that.

[0017] The molding lens part or the molding non-lens part is joined to one or both sides of a glass lens, the molded lens being characterized in that.

[0018] The molding die according to one aspect of the present invention that solves the above problems is for refracting light molding a lens part and the molding non-lens part on the outer periphery of the molding lens part are formed of a photocurable resin. In the molding die for a molded lens, The molding die has a die lens part and a die non-lens part having shapes corresponding to the molded lens part and the molded non-lens part respectively. the the die non-lens part of the molding die convex part is formed with and a concave part reaching the outermost circumference of the die non-lens part in the radial direction is formed outside the convex part in the die non-lens part of the molding die. Let the distance from the center of the molding die to the outermost circumference of the die lens part be X1, the distance from the center of the molding die to the outermost circumference of the die non-lens part be X2, and when X3 is defined by the following mathematical formula (1), the position outside the convex part formed in the die non-lens part is located inside X3 the molding die being characterized in that. (X2 - X1)÷2 = X3 Equation (1)

Advantages of the Invention

[0019] According to the present invention, it is possible to provide a method for manufacturing a molded lens, a molded lens, and a molding die that enable improvement in releasability and reduction in the outer diameter of the molded lens.

Brief Description of the Drawings

[0020]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Figure 9

Figure 10

Figure 11

Figure 12

Embodiments for Carrying Out the Invention

[0021] Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. The dimensions, materials, and other specific numerical values shown in such embodiments are merely examples for facilitating understanding of the invention, and do not limit the present invention unless otherwise specified. In the present specification and drawings, elements having substantially the same functions and configurations are denoted by the same reference numerals to omit redundant description, and elements not directly related to the present invention are not shown.

[0022] In the present invention, the MoldIf the resin is not completely supplied to the lens part (effective area), the optical performance as a molded lens will not be satisfied. However, Mold The resin does not have to be completely supplied to the non-lens part (such as a general flange part), and it does not have a great influence on the optical performance as a molded lens. Also, Forming As the non-lens part, Forming All parts formed of resin other than the lens part in the molded lens shall be included.

[0023] FIG. 1 shows a perspective view of a conventional molding die 1, and FIG. 2 shows a cross-sectional view at the time of joining the molding die 1, a substrate 11 having an optical function, and a photocurable resin 12 when manufacturing a molded lens using the conventional molding die 1. In the molding die 1, Mold a lens part 1-1 which is important as the performance of the molded lens and Mold a non-lens part 1-2 are provided. On the outer periphery of the molding die 1, there is a substrate receiving part 1-3 of the molding die 1 for placing the substrate 11 having an optical function.

[0024] In order to satisfy the optical performance of the molded lens, Mold the photocurable resin 12 must be completely supplied to the lens part 1-1. However, Mold even if the photocurable resin 12 is not completely supplied to the non-lens part 1-2, it does not have a great influence on the optical characteristics. Regarding the supply of the photocurable resin 12, it is necessary to consider and control the supply variation of the photocurable resin 12. Examples of supply variations include shot-to-shot variations of the dispenser that supplies the photocurable resin 12 and variations in the viscosity of the photocurable resin 12 due to the environment. When the supply amount of the photocurable resin 12 increases and Mold exceeds the outermost periphery of the non-lens part 1-2, it causes appearance defects and productivity deterioration of the molded lens.

[0025] Also, FIG. 3 shows the phenomenon in which bubbles 13 are generated during the manufacture of the molded lens. Using the conventional molding die 1, MoldWhen the photocurable resin 12 is evenly supplied to the outermost periphery of the non-lens part 1-2, air will be supplied from the outside to compensate for the shrinkage due to curing of the photocurable resin 12. As a result, Mold air bubbles 13 may appear in the non-lens part 1-2.

[0026] Figure 4 shows a cross-sectional view during the production of the molded lens according to the present invention. The method for manufacturing the molded lens of the present invention is carried out as follows. In the molding die 2, Mold an appropriate amount of the photocurable resin 12 is supplied near the center of the lens part 2-1. Then, a substrate 11 having an optical function is placed on the substrate receiving part 2-3 of the molding die 2, UV curing is performed, and the photocurable resin 12 and the substrate 11 having an optical function are joined inside the molding die 2. At this time, it is important for the performance of the molded lens Formed lens part to achieve good molding by supplying external air from between the substrate 11 having an optical function and the molding die 2 when the photocurable resin 12 cures and shrinks. Formed non - lens part It is important to transfer the shape of (Mold lens part 2 - 1, Mold non - lens part 2 - 2) to the shape of the molding die 2, and it is important to maintain the transferability for manufacturing a high-precision molded lens without deteriorating the mold release property.

[0027] As a characteristic of the UV curing of a general molded lens, it is known that curing is completed from a portion where the resin thickness is thin, and at that time, shrinkage due to curing of the resin occurs. For example, the resin lacking due to the curing shrinkage of the resin may be compensated from a portion where the resin thickness is thick. The portion where the resin thickness is thick will complete curing with only the remaining resin that has become less after being compensated to the portion where the resin thickness is thin. In the portion where the resin has become less, the resin binds to each other in a state where the transfer with the molding die is not completely achieved. As a result, the portion where the resin has become less is likely to generate sink marks. Therefore, in an area where the thickness of the photocurable resin is different, there is a portion where a phenomenon called sink marks occurs. The present invention utilizes this phenomenon to Mold maintain the transferability of the lens part 2-1 of the molding die 2 while Mold forming a convex portion 2-4 in the non-lens part 2-2 to have a structure that does not deteriorate the mold release property for improving productivity. However, MoldRegarding the photocuring of the lens unit 2-1, Mold non-lens part Inner formed non - lens part before performing photocuring of Mold only the lens unit 2-1 Inner formed non - lens part is photocured to Mold avoid the phenomenon of sink marks in the lens unit 2-1. Inner formed lens part

[0028] In addition, in FIG. 4, X1, X2, and X3 are described to explain the position of the convex portion 2-4 formed in the Mold non-lens part 2-2 (Formed non - lens part) of the molding die 2. X1 described in FIG. 4 is the distance from the center of the molding die 2 to Mold the outermost peripheral portion of the lens unit 2-1, and X2 is the distance from the center of the molding die 2 to (Formed lens part) the outermost peripheral portion of the non-lens part 2-2, and Mold the position of the convex portion 2-4 formed in the non-lens part 2-2 (Formed non - lens part) is the position obtained by adding X1 to X3 calculated by the following mathematical formula (1), and the position of the convex portion 2-4 is defined by the following mathematical formula (1). Mold (X2 - X1) ÷ 2 = X3 Mathematical formula (1) (Formed non - lens part)

[0029] Therefore, the position X3 of the convex portion 2-4 formed in the Mold non-lens part 2-2 (Formed non - lens part) of the molding die 2 is within the range of the position obtained by adding the distance from the center of the molding die 2 to Mold the outermost peripheral position of the non-lens part 2-2 (Formed non - lens part) X2 to the distance from the center of the molding die 2 to Mold the outermost peripheral position X1 of the lens unit 2-1. (Formed lens part) Mold the outermost peripheral position of the lens unit 2-1. (Formed lens part)

[0030] Also, the Mold non-lens part 2-2 (Formed non - lens part)Regarding the shape of the convex portion 2-4 formed therein, there are no particular restrictions. However, in the height direction, it naturally does not exceed the height of the base material receiving portion 2-3 of the molding die 2 for molding. In the width direction, the inner position cannot be formed within the Mold lens portion 2-1 (Formed lens part) and the outer position cannot be formed beyond the position of X3.

[0031] FIG. 5 shows a perspective view of the molding die 2 used in the production of the molded lens according to the present invention described in FIG. 4. It can be seen that Mold a convex portion 2-4 is formed in the non-lens portion 2-2 of the molding die 2. The convex portion 2-4 shown in FIG. 5 is formed in a circumferential shape, but the shape of the convex portion is not limited.

[0032] FIG. 6 shows a perspective view of the molded lens produced using the manufacturing method of the molded lens of FIG. 4 and the molding die 2 of FIG. 5. The manufacturing method of FIG. 4 and the molding die 2 described in FIG. 5, which are features of the present invention, Mold the convex portion 2-4 formed in the non-lens portion 2-2 is formed as a concave portion 6-3 of the produced molded lens 6.

[0033] In the conventional method for manufacturing a molded lens, considering the curing shrinkage, Mold it is necessary to avoid the uniform supply of the photocurable resin to the non-lens portion of the molding die and provide an excess area in the non-lens portion of the molding die. Mold When the photocurable resin is uniformly supplied up to the outermost peripheral portion of the molding die, when the photocurable resin cures and shrinks, it draws air from the outside. As a result,

[0034] bubbles are generated in the non-lens portion. That is, when the photocurable resin is supplied up to the outer peripheral limit of the non-lens portion of the molding die, the photocurable resin adheres to the base material having an optical function and the molding die and does not separate, and air may enter, resulting in bubbles. However, the manufacturing method of the present invention can avoid this phenomenon. Forming Mold

[0035] ​​FIG. 7 shows a perspective view of the molding die 3 used in the production of the molded lens according to the present invention. The method for producing the molded lens of the present invention is carried out as follows. An appropriate amount of the photocurable resin 12 is supplied near the center of the lens portion 3-1 of the molding die 3. Then, a substrate 11 having an optical function is placed on the substrate receiving portion 3-3 of the molding die 3, and UV curing is performed to bond the photocurable resin 12 and the substrate 11 having an optical function inside the molding die 3. At this time, Mold By supplying external air from the concave portion 3-5 of the molding die 3 when the lens portion 3-1 and the photocurable resin 12 cure and shrink, it becomes possible to achieve good molding. The outer peripheral portion of the photocurable resin 12 is in a free state, and the curing shrinkage can be performed smoothly, and it is difficult for bubbles to occur. Mold When the lens portion 3-1 and the photocurable resin 12 cure and shrink, it becomes possible to achieve good molding by supplying external air from the concave portion 3-5 of the molding die 3 to the outside. The outer peripheral portion of the photocurable resin 12 is in a free state, and the curing shrinkage can be performed smoothly, and it is difficult for bubbles to occur.

[0036] The molding die 3 shown in FIG. 7 is characterized in that a concave portion 3-5 is formed on the outer periphery of the non-lens portion 3-2 of the molding die 3. By using the method for producing a molded lens using the molding die 3 shown in FIG. 7, it is difficult for bubbles to occur. Further, in order to control (manage) the thickness of the molded lens, it is necessary to bring the substrate receiving portion 3-3 of the molding die 3 into contact with the substrate 11 having an optical function. However, since it is not necessary to bring it into contact with the entire circumference of the substrate receiving portion 3-3 of the molding die 3, for example, it is possible to provide a slit shape in the substrate receiving portion 3-3 of the molding die 3, and when the photocurable resin 12 cures and shrinks, it is possible to achieve good molding by supplying external air from the substrate 11 having an optical function and the concave portion 3-5 of the molding die 3. Mold The molding die 3 shown in FIG. 7 is characterized in that a concave portion 3-5 is formed on the outer periphery of the non-lens portion 3-2 of the molding die 3. By using the method for producing a molded lens using the molding die 3 shown in FIG. 7, it is difficult for bubbles to occur. Further, in order to control (manage) the thickness of the molded lens, it is necessary to bring the substrate receiving portion 3-3 of the molding die 3 into contact with the substrate 11 having an optical function. However, since it is not necessary to bring it into contact with the entire circumference of the substrate receiving portion 3-3 of the molding die 3, for example, it is possible to provide a slit shape in the substrate receiving portion 3-3 of the molding die 3, and when the photocurable resin 12 cures and shrinks, it is possible to achieve good molding by supplying external air from the substrate 11 having an optical function and the concave portion 3-5 of the molding die 3.

[0037] Further, when it is desired to miniaturize the molded lens, due to the substrate receiving portion 1-3 of the molding die 1, there is a limitation in miniaturizing the outer diameter (or outer shape) of the substrate 11 having an optical function to which the photocurable resin 12 is bonded. If the non-lens portion 1-2 of the molding die 1 is forcibly made smaller, it will induce the mixing of bubbles and the molded lens will become a defective product. Mold If the non-lens portion 1-2 of the molding die 1 is made smaller, it will induce the mixing of bubbles and the molded lens will become a defective product.

[0038] Therefore, in the molding die 3 of the present invention in FIG. 7, the molding die 3 MoldA part of the non-lens portion 3-2 is removed to form a shape that does not generate bubbles. Since the recess 3-5 is formed up to the outermost periphery of the molding die 3, when the photocurable resin 12 shrinks due to curing, it is possible to procure external air from the recess 3-5 of the molding die 3, enabling good molding and making it difficult for bubbles to occur.

[0039] Also, regarding the Mold shape of the recess 3-5 formed in the non-lens portion 3-2 of the molding die 3, there is no particular regulation. However, in the height direction, naturally, it does not exceed the height of the base material receiving portion 3-3 of the molding die 3. In the width direction, it varies depending on the number of stepped portions. The inner position cannot be formed within the lens portion 3-1 of the molding die 3, and the outer position reaches the outermost periphery of the molding die 3 and is formed. Regarding the number of steps, there is no particular limitation, and it is preferably formed evenly, but an optimal step can be set as appropriate. Mold Regarding the number of steps, there is no particular limitation, and it is preferably formed evenly, but an optimal step can be set as appropriate.

[0040] FIG. 8 shows a perspective view of the molded lens 7 manufactured using the molding die 3 of FIG. 7. The Mold recess 3-5 formed in the non-lens portion 3-2 of the molding die 3 shown in FIG. 7 is formed as the convex portion 7-4 of the manufactured molded lens 7.

[0041] FIG. 9 shows a molding die 4 in which the recesses 3-5 formed in the molding die 3 of FIG. 7 are not formed evenly. FIG. 10 shows a molded lens 8 molded by the molding die 4 of FIG. 9.

[0042] The features of the molded lens 8 shown in Fig. 10 formed using the molding die 4 shown in Fig. 9 are as follows. For example, in the case of the molded lens 8 formed in a circular shape, the molding position (angle) of the molded lens 8 can be limited based on the portion where the convex portion 8-4 of the molded lens 8 is not evenly formed. When there is eccentricity or the like in the molding die 4, the eccentricity direction of the molded lens 8 can be limited. Therefore, when assembling a plurality of molded lenses 8 into a lens barrel to manufacture a lens unit, it becomes possible to assemble them in combination with the eccentricity directions of other molded lenses. For example, when assembling with an automatic machine or the like, it is possible to perform the assembly by image recognition of a portion that is not evenly formed.

[0043] Also, when assembling a plurality of molded lenses into a lens barrel to manufacture a lens unit, as management of the plurality of molded lenses, by changing the number and shape of the concave portions 4-5 (convex portions 8-4 of the molded lens) of the molding die 4 for each molded lens, it becomes possible to manage the types and lots of the molded lenses. The concave portions 4-5 (convex portions 8-4 of the molded lens) of the molding die 4 only need to be formed at least in one place or more, and the shape does not have to be parallel lines. For example, there may be curved lines, diagonal lines, or stepped shapes in part, and it is possible to form them with a high degree of freedom.

[0044] The molding die 5 shown in Fig. 11 is formed with a convex portion 5-4 of the molding die 5 corresponding to the convex portion 2-4 of the molding die 2 described in Figs. 4 and 5, and a concave portion 5-5 of the molding die 5 corresponding to the concave portion 3-5 of the molding die 3 described in Fig. 7. Fig. 12 shows a molded lens 9 molded using the molding die 5.

[0045] The convex portions (concave portions of the molded lens) and concave portions (convex portions of the molded lens) of the molding die, such as the molding die 5 described in Fig. 11 and the molded lens 9 described in Fig. 12, have a high degree of freedom in combination and shape, and can be appropriately set according to the optical performance and shape of the molded lens.

[0046] The photocurable resin 12 used in the present invention is optimally an ultraviolet curable resin that cures with light rays in the range of 300 nm to 400 nm. Similarly, the substrate 11 having optical functions has a function of transmitting light wavelengths in the range of 300 nm to 400 nm, and it is desirable to bond the ultraviolet curable resin to the substrate 11 having optical functions.

[0047] Manufactured by the method for manufacturing a molded lens according to the present invention Mold The lens portions (1-1, 2-1, 3-1, 4-1, 5-1) and Mold the non-lens portions (1-2, 2-2, 3-2, 4-2, 5-2) are bonded to one or both surfaces of the substrate 11 having optical functions and are selected according to the optical performance required for the molded lens. Also, Forming the lens portion and Forming as the substrate 11 having optical functions for forming the lens portion and the non-lens portion, Forming it is also possible to form on the lens portion of a glass lens on which the lens portion has already been formed, and depending on the application, on any substrate Forming it is possible to manufacture the lens portion and Forming the non-lens portion. Also, even when the substrate 11 having optical functions is pre-coated, it is possible to appropriately manufacture the molded lens. Forming The molded lens of the above-described embodiment is cylindrical, but the present invention has a high degree of freedom in the outer shape and can be appropriately set according to the specifications of the molded lens.

[0048] Although the molded lens of the above-described embodiment is cylindrical, the present invention has a high degree of freedom in the outer shape and can be appropriately set according to the specifications of the molded lens.

[0049] Although the embodiments of the present invention have been described in detail above, the present invention is not limited to the above embodiments. Also, various improvements and modifications are possible within the scope not departing from the gist of the present invention.

Explanation of Reference Numerals

[0050] 1 Mold 1 for molding 1-1 Mold Lens portion 1-2 Mold Non-lens portion 1-3 Substrate receiving portion 2 Mold 2 for molding 2-1 Mold Lens part 2-2 Mold Non-lens part 2-3 Substrate receiving part 2-4 Protrusion 3 Molding die 3 3-1 Mold Lens part 3-2 Mold Non-lens part 3-3 Substrate receiving part 3-5 Recess 4 Molding die 4 4-1 Mold Lens part 4-2 Mold Non-lens part 4-3 Substrate receiving part 4-5 Recess 5 Molding die 5 5-1 Mold Lens part 5-2 Mold Non-lens part 5-3 Substrate receiving part 5-4 Protrusion 5-5 Recess 6 Molded lens 6-1 Of the molded lens Forming Lens part 6-2 Of the molded lens Forming Non-lens part 6-3 Recess of the molded lens 7 Molded lens 7-1 Of the molded lens Forming Lens part 7-2 Of the molded lens Forming Non-lens part 7-4 Protrusion of the molded lens 8 Molded lens 8-1 Of the molded lens Forming Lens part 8-2 Of the molded lens Forming Non-lens part 8-4 Protrusion of the molded lens 9 Molded lens 9-1 Of the molded lens Forming Lens part 9-2 Of the molded lens Forming Non-lens part Recessed portion of the molding lens 9-3 Convex portion of the molding lens 9-4 Substrate having an optical function 11 Optically curable resin 12 Air bubble 13

Claims

1. In a method for manufacturing a molded lens in which a molded lens portion for refracting light and a molded non-lens portion on the outer periphery of the molded lens portion are formed of a photocurable resin, wherein the molded lens portion and the molded non-lens portion are a molded lens joined to a substrate having an optical function, a step of supplying the photocurable resin to a molding die having a mold lens portion and a mold non-lens portion having shapes corresponding to the molded lens portion and the molded non-lens portion, respectively; a step of joining the photocurable resin and the substrate having an optical function inside the molding die; a step of curing the molded lens portion with light rays before curing the molded non-lens portion with light; a step of curing the molded non-lens portion with the light rays; a step of demolding the molded lens from the molding die, and having, a convex portion is formed on the mold non-lens portion of the molding die, on the mold non-lens portion of the molding die, a concave portion reaching the outermost periphery of the mold non-lens portion in the radial direction is formed outside the convex portion, wherein the distance from the center of the molding die to the outermost peripheral portion of the mold lens portion is X1, the distance from the center of the molding die to the outermost peripheral portion of the mold non-lens portion is X2, and when X3 is defined by the following formula (1), the position outside the convex portion formed on the mold non-lens portion is located inside X3. A method for manufacturing a molded lens, characterized in that. (X2 - X1) ÷ 2 = X3 Formula (1)

2. The method for manufacturing a molded lens according to claim 1, wherein the photocurable resin is an ultraviolet curable resin that cures with the light rays of 300 nm to 400 nm.

3. The substrate having an optical function has a function of transmitting light wavelengths of 300 nm to 400 nm, and the photocurable resin is joined to the surface of the substrate having an optical function. The method for manufacturing a molded lens according to claim 1 or claim 2, characterized in that.

4. In a molded lens in which a molded lens portion for refracting light and a molded non-lens portion on the outer periphery of the molded lens portion are formed of a photocurable resin, wherein the molded lens portion and the molded non-lens portion are a molded lens joined to a substrate having an optical function, a concave portion is formed in the molded non-lens portion of the molded lens, On the non-lens forming portion of the formed lens, a convex portion reaching the outermost periphery of the non-lens forming portion in the radial direction is formed outside the concave portion and on the outer side of the non-lens forming portion. When the distance from the center of the formed lens to the outermost peripheral portion of the lens forming portion is X1, the distance from the center of the formed lens to the outermost peripheral portion of the non-lens forming portion is X2, and X3 is defined by the following mathematical formula (1), the position outside the concave portion formed in the non-lens forming portion is located inside X3. A formed lens characterized by this. (X2 - X1) ÷ 2 = X3 Mathematical formula (1)

5. The formed lens according to claim 4, wherein the photocurable resin is an ultraviolet curable resin that cures with light rays of 300 nm to 400 nm.

6. The substrate having the optical function has a function of transmitting light wavelengths of 300 nm to 400 nm, and the photocurable resin is bonded to the surface of the substrate having the optical function. The formed lens according to claim 4 or claim 5, characterized by this.

7. The formed lens according to any one of claims 4 to 6, characterized in that the lens forming portion or the non-lens forming portion is bonded to one or both surfaces of a glass lens.

8. In a mold for forming a formed lens in which a lens forming portion for refracting light and a non-lens forming portion on the outer periphery of the lens forming portion are formed of a photocurable resin, The forming mold has a mold lens portion and a mold non-lens portion having shapes corresponding to the lens forming portion and the non-lens forming portion, respectively. A convex portion is formed in the mold non-lens portion of the forming mold. In the mold non-lens portion of the forming mold, a concave portion reaching the outermost periphery of the mold non-lens portion in the radial direction is formed outside the convex portion and on the outer side of the mold non-lens portion. When the distance from the center of the forming mold to the outermost peripheral portion of the mold lens portion is X1, the distance from the center of the forming mold to the outermost peripheral portion of the mold non-lens portion is X2, and X3 is defined by the following mathematical formula (1), the position outside the convex portion formed in the mold non-lens portion is located inside X3. A forming mold characterized by this. (X2 - X1) ÷ 2 = X3 Mathematical formula (1)

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