JP2007133197A - Optical component and its manufacture method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To obtain an optical component where a thin metallic plate is integrally attached to the outside of the effective optical diameter of an optical device. <P>SOLUTION: The optical component 7 is equipped with a pair of molding dies 2 and 3 oppositely arranged via thermoplastic material 5 and the metallic plate 6 arranged around the thermoplastic material 5, and a pressuring shaft 10 pressing and molding the softened thermoplastic material 5 in such a state that the pair of molding dies 2 and 3 are moved close to each other. When molding the optical device 15 by pressing the thermoplastic material 5, the optical device 15 and the metallic plate 6 are brought into contact with each other and integrally joined. In such a case, when it is assumed that the thickness in an optical axis direction at the innermost periphery part of the metallic plate 6 is (a) and the thickness in the optical axis direction at the part coming into contact with the metallic plate 6 at the outer periphery part of the optical device 15 is (b), they have relation a≤b. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an optical component obtained by integrally tightly bonding a plastic material disposed in a mold and a frame disposed around the plastic material, and a manufacturing method thereof.

  In recent years, a technique for molding an optical element such as a lens used in an optical apparatus by a molding means has been frequently used. On the other hand, with the reduction in thickness of optical devices, for example, the lens itself as an optical element is required to be thin. However, in consideration of centering work for removing the peripheral edge of the lens for centering and mounting on a lens frame, the lens thickness cannot often be made so thin.

  On the other hand, for example, in Patent Document 1, a frame body made of a metal material is disposed around the molding surfaces of the upper mold and the lower mold which are arranged to face each other, and the preform sandwiched between the upper mold and the lower mold is heated. A technique is disclosed in which an optical element is molded by softening and relatively moving an upper die and a lower die closer to each other.

The frame body has a slit formed in a part in the circumferential direction, and the peripheral edge of the optical element is tightly coupled to the inner surface of the frame body. Thereby, even if there is a difference in thermal expansion coefficient between the optical element and the frame, the centering operation is unnecessary, and the elasticity of the frame can prevent the optical element from dropping or cracking. That's it.
JP-A-9-221332 (page 2-3, FIG. 2)

  However, in Patent Document 1, it has been proposed to eliminate the need for the centering operation. However, in order to cope with the reduction in the thickness of the optical device, when the lens thickness and the frame thickness are reduced, Since it is discontinuous by the slit formed in a part in the circumferential direction, the entire rigidity including the frame and the optical element is lowered. For this reason, there is a possibility that the roundness, flatness, etc. required for the optical element may be lost.

  The present invention has been made to solve such a problem, and an object of the present invention is to provide a highly accurate optical component in which a thin frame is integrally attached outside the effective optical diameter of an optical element and a method for manufacturing the same. It is to provide.

In order to achieve the object, the invention according to claim 1
In the optical component formed by tightly bonding the optical element and the frame integrally,
When the thickness in the optical axis direction at the innermost peripheral part of the frame is a, and the thickness in the optical axis direction of the part in contact with the frame at the outer peripheral part of the optical element is b,
a ≦ b
It has the relationship of these.

The invention according to claim 2 is the optical component according to claim 1,
The frame body is made of metal.
The invention according to claim 3 is the optical component according to claim 1,
If the ratio of the thickness of the optical axis center of the optical element to the thickness of the outer peripheral portion is the thickness deviation X,
1.4 ≦ X ≦ 10
It has the relationship of these.

The invention according to claim 4 is the optical component according to any one of claims 1 to 3,
When the linear expansion coefficient of the optical element at a temperature of 100 ° C. to 300 ° C. is α ₁ and the linear expansion coefficient of the frame is α ₂ ,
α ₂ ≦ α ₁
It has the relationship of these.

The invention according to claim 5 is the optical component according to any one of claims 1 to 4,
The frame is characterized in that at least one of a regular polygon hole, a groove, or a notch that is symmetrical about the optical axis is formed.

The invention according to claim 6 is the optical component according to any one of claims 1 to 5,
When the inner diameter when the frame body is a disk with holes is d and the outer diameter is D,
D ≧ d + 1.8 mm (however, d ≦ 20)
It has the relationship of these.

The invention according to claim 7 is the optical component according to any one of claims 1 to 6,
A taper surface of 0 to 60 ° with respect to a plane substantially orthogonal to the optical axis is formed on the inner periphery of the frame.

The invention according to claim 8 is the optical component according to any one of claims 1 to 7,
When the thickness of the frame is t,
0.1mm ≦ t ≦ 0.4mm
It has the relationship of these.

The invention according to claim 9 is the optical component according to any one of claims 1 to 8,
A black chrome treatment is applied to the surface of the frame.
The invention according to claim 10 is the optical component according to any one of claims 1 to 9,
A rib is formed on the frame body.

The invention according to claim 11 is the optical component according to any one of claims 1 to 10,
The frame bodies are connected in a circumferential direction around the optical axis.
The invention according to claim 12
By pressing a softened plastic material sandwiched between a pair of opposing molds, an optical surface is transferred to the plastic material, and an optical element is molded, and a frame disposed around the plastic material is provided. In the method of manufacturing an optical component that is tightly bonded integrally with the optical element in the step of pressing the plastic material,
The thickness in the optical axis direction at the innermost peripheral portion of the frame body is molded so as to be equal to or less than the thickness in the optical axis direction of the portion in contact with the frame body at the outer peripheral portion of the optical element. And

  According to the present invention, it is possible to obtain a highly accurate optical component in which a thin frame is integrally attached outside the effective optical diameter of the optical element.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
1A and 1B are cross-sectional views showing a configuration example of a molding apparatus according to an embodiment of the present invention.
In FIG. 1A, the molding apparatus 1 includes an upper mold 2, a lower mold 3, and a sleeve mold 4. The upper mold 2 and the lower mold 3 are fitted into the sleeve mold 4 so that the molding surface 2a and the molding surface 3a face each other inside the sleeve mold 4. The upper mold 2 and the lower mold 3 are manufactured by polishing a cemented carbide such as tungsten carbide (WC).

  In the present embodiment, the upper die 2 is slidable in the axial direction of the sleeve die 4 by a pressure shaft 10 as a pressure device. A thermoplastic material 5 such as glass or plastic is disposed between the molding surface 2a of the upper mold 2 and the molding surface 3a of the lower mold 3. An air vent hole 8 is formed in the side wall of the sleeve mold 4. With this hole 8, when the upper and lower molds 2, 3 are inserted into the sleeve mold 4, the internal air is removed and molding is performed under an appropriate clearance. Further, a thin metal plate (frame body) 6 having a disk shape with a hole is disposed around the thermoplastic material 5.

  As shown in FIG. 1B, the thermoplastic material 5 is heated and softened by a heating device (not shown), and then the upper mold 2 is moved closer to the lower mold 3 by the pressing shaft 10 to be softened. The thermoplastic material 5 is formed into a predetermined shape. At this time, the metal plate 6 disposed around the thermoplastic material 5 is tightly joined integrally with the thermoplastic material 5 and then cooled.

  In addition, in this embodiment, since the influence by the heat | fever of the metal plate 6 etc. is considered, it is thought that there is little necessity to consider this about a plastic material, for example, about an energy curable material.

  FIG. 2 shows the appearance of the optical component 7 obtained as described above. That is, in the optical component 7, the metal plate 6 is integrally formed around the optical element (concave meniscus lens) 15. In addition, the figure has shown the figure by which the metal plate 6 was cut | disconnected by the angle of about 180 degrees so that the whole shape of the optical component 7 may be grasped | ascertained easily. In the present embodiment, a concave meniscus lens is described as an example of the optical element 15. However, the present invention is not limited to this, and can be applied to, for example, a convex meniscus lens or an aspheric lens.

3A to 3D show the joined state of the optical element 15 and the metal plate 6.
In the present embodiment, in order to secure the bonding strength between the optical element 15 and the metal plate 6, the thickness of each of the portions where the metal plate 6 and the optical element 15 are in contact with each other is drawn out in order to sandwich and hook the metal plate 6. It defines the relationship. In this case, the joining by the stretch of the optical element 15 to the metal plate 6 and the joining to the optical element 15 by the surface roughness of the metal plate 6 are contemplated.

  Specifically, when the thickness in the optical axis direction at the innermost peripheral portion of the metal plate 6 is a, and the thickness in the optical axis direction of the portion in contact with the metal plate 6 at the outer peripheral portion of the optical element 15 is b. , A ≦ b. In addition, when the inner peripheral surface of the metal plate 6 is finished rough, it has an effect that the bonding between the metal plate 6 and the optical element 15 is strengthened (anchor effect). And from the relationship of the thickness of the said contact part, as shown to Fig.3 (a)-(d), the various joining relationship in the junction part of the optical element 15 and the metal plate 6 is obtained.

  That is, FIG. 3A shows an embodiment in which the outer peripheral portion of the optical element 15 protrudes upward and downward with respect to the metal plate 6 at the contact portion. FIG. 3B shows an embodiment in which the outer peripheral portion of the optical element 15 protrudes upward only with respect to the metal plate 6 at the contact portion.

  Further, FIG. 3C shows an embodiment in which the thickness a of the metal plate 6 and the thickness b of the outer peripheral portion of the optical element 15 are substantially equal at the contacting portion. FIG. 3D shows an embodiment in which the outer peripheral portion of the optical element 15 protrudes only downward from the metal plate 6 in the contact portion.

FIG. 4 is a diagram illustrating the definition of the thickness of the metal plate 6 when the thickness of the metal plate 6 changes in the radial direction in the present embodiment.
That is, in FIG. 4, the thickness in the optical axis direction at the innermost peripheral portion of the metal plate 6 is the thickness a of the minimum diameter portion of the metal plate 6. Further, the thickness in the optical axis direction of the portion in contact with the metal plate 6 at the outer peripheral portion of the optical element 15 is the thickness b in the optical axis direction passing through the minimum diameter portion of the metal plate 6.

  Next, FIG. 5 shows an optical element according to the difference in the thickness deviation X, where the ratio of the center thickness to the thickness of the outer circumference of the optical element 15 (center thickness / thickness of the outer circumference) is the thickness deviation X. It is a figure which shows the presence or absence of 15 cracks.

  This is because the metal plate 6 generally cools faster than the optical element 15 at the time of cooling after molding, and therefore, a ring-shaped crack occurs in the outer peripheral portion of the optical element 15 due to the temperature difference at the time of cooling. Therefore, it is necessary to make this outer peripheral portion thin to some extent so that the outer peripheral portion of the optical element 15 is also cooled quickly. According to FIG. 5, cracks occur when the thickness deviation X (center thickness of the optical element / thickness of the outer peripheral portion) is 1.16 or 1.34, but the thickness deviation X is 1.4 or It was found that no cracks occurred at 3.0.

  Therefore, in the present embodiment, it has been concluded that the occurrence of cracks can be prevented if the thickness deviation X is 1.4 or more. If the thickness deviation X is greater than 10, the outer peripheral portion of the optical element 15 is cooled too quickly and breaks. Therefore, an upper limit value is also required, and this upper limit value is set to 10.

FIG. 6 is a view showing the center thickness t of the optical element 15 and the thickness t ′ of the outer peripheral portion in order to define the thickness deviation X. FIG. That is, according to this figure, the thickness deviation is defined as X = t / t ′.
Next, in consideration of the linear expansion coefficient α ₁ of the optical element 15 at 100 ° C. to 300 ° C. and the linear expansion coefficient α ₂ of the metal plate 6, if compressive stress is applied to the optical element 15 during cooling after molding, the optical element 15 accuracy will be deteriorated. For this reason, the linear expansion coefficient α ₁ of the optical element 15 in the above temperature range is made larger than the linear expansion coefficient α ₂ of the metal plate 6 so that tensile stress is applied to the optical element 15 during cooling.

Therefore, in this embodiment, α ₂ ≦ α _{1 at} a temperature of 100 ° C. to 300 ° C.
It was decided to satisfy the relationship.
Next, in this embodiment, as shown to Fig.7 (a)-(e), the regular polygon hole 20, the groove | channel 22, or notch | At least one of them is formed. The provision of the regular polygonal hole 20, the groove 22, or the notches 12, 14, 18 symmetrically with respect to the optical axis center O makes the stress applied to the optical element 15 substantially uniform along the circumferential direction thereof. Because.

  However, the metal plate 6 of the present embodiment is formed so as not to be continuous in the circumferential direction. In addition, these regular polygon hole 20, the groove | channel 22, or the notches 12, 14, and 18 may be formed independently, and some of these may be used in combination.

  Here, for example, glass, which is a material of the optical element 15, has many types and has a wide variety of linear expansion coefficients, whereas the type of metal that is the material of the metal plate 6 is limited, and the linear expansion coefficient is Since there are only a few types, it is not possible to select a metal linear expansion coefficient according to the glass.

For example, the linear expansion coefficient of glass for molding is approximately 60 to 170 × 10 ⁻⁷ / ° C., and the linear expansion coefficient of a metal material that can be used as, for example, the metal plate 6 is 100 in the case of stainless steel. × 10 ^-7 / ° C, austenitic 170 × 10 ^-7 / ° C, low-expansion nickel alloy 50 × 10 ^-7 / ° C.

Therefore, in order to relieve the stress caused by the difference between the linear expansion coefficients of glass and metal, the metal plate 6 having a shape that absorbs the stress is required.
7A to 7E show plan views of various shapes of the metal plate 6 used in the present embodiment. As described above, all the metal plates 6 are continuously connected in the circumferential direction. Moreover, the shape of the metal plate 6 shown in the present embodiment is an example, and various other variations are conceivable.

  Then, an optical element 7 (not shown) is integrally and closely joined to the central holes 11, 13, 17, 20, and 21 of these various metal plates 6 to obtain the optical component 7. However, it can also be grasped as a figure in which the transparent optical element 15 is integrally tightly bonded. 7A to 7E indicate the substantially outer diameter of the optical element 15 when the optical element 15 is tightly bonded to the metal plate 6.

  In FIG. 7A, a substantially circular hole 11 is formed at the center of a disk-shaped metal plate 6, and a number of narrow notches 12 are formed symmetrically with respect to the optical axis O. The notch 12 communicates with the hole 11 and expands from the peripheral surface of the hole 11 in a spiral shape in the radial direction. At the time of molding, a part of the optical element 15 enters and is joined to the notch 12 portion on the inner peripheral side.

  In FIG. 7B, a substantially circular hole 13 is provided at the center of the disk-shaped metal plate 6, and a large number of notches 14 are formed symmetrically with respect to the optical axis O. The notch 14 has a rectangular shape extending in the radial direction, and one end communicates with the hole 13. FIG. 7B ′ shows the AA ′ cross section. As shown in FIG. 7B, the metal plate 6 has a bent portion 16 in the circumferential direction so as to connect a large number of notches 14. Is formed. The bent portion 16 gives elasticity to the metal plate 6 and is held and joined to the optical element 15 during molding.

  In FIG. 7 (c), a substantially circular hole 17 is provided at the center of the disc-shaped metal plate 6, and four notches 18 are formed symmetrically with respect to the optical axis O. Four notches 19 are formed by the notches 18. The protrusion 19 protrudes in the radial direction toward the optical center O. At the time of molding, the projection 19 is sandwiched and joined to the optical element 15.

  In FIG. 7D, a regular polygonal hole 20 is formed at the center of the disc-shaped metal plate 6. This regular polygonal hole 20 forms a regular octagon in this embodiment. At the time of molding, the regular polygonal hole 20 pulls out the action of hooking and joining the optical element 15.

  In FIG. 7 (e), a substantially circular hole 21 is provided at the center of the disk-shaped metal plate 6, and a total of eight grooves 22 are formed symmetrically with respect to the optical axis O. At the time of molding, the metal plate 6 is elastically deformed by the groove 22 to relieve the stress applied to the optical element 15.

  FIG. 8 shows a joined state between the optical element 15 and the metal plate 6. In the same figure, when the thickness of the metal plate 6 is set to a predetermined value, if the difference (width) between the inner diameter d and the outer diameter D is too small, the metal plate 6 is likely to be warped. Width is required. Therefore, FIG. 9 shows the result of examining whether or not warpage occurs according to the difference between the inner diameter d and the outer diameter D of the metal plate 6. A plate thickness of 0.3 mm was used.

According to the figure, the inner diameter d and outer diameter D of the metal plate 6 are
D ≧ d + 1.8 mm (however, d ≦ 20)
If the above relationship is satisfied (that is, if the difference between the outer diameter D and the inner diameter d is 1.8 mm or more), it can be seen that the occurrence of warpage can be suppressed. Note that the reason why the inner diameter d ≦ 20 is set is that practical use is not assumed when the inner diameter is larger than this.

FIGS. 10A to 10C show the shape of the inner peripheral portion 6 a of the metal plate 6.
As shown in FIG. 10A, an upward taper surface 6a of θ = 0 to 60 ° is formed on the inner peripheral portion of the metal plate 6. Thereby, a downward urging force is applied to the metal plate 6 from the optical element 15 at the time of molding, and the metal plate 6 is prevented from being lifted.

  Further, as shown in FIG. 11 (a), if the tapered surface is not formed on the inner peripheral portion of the metal plate 6, the light hits the inner peripheral portion and the light is reflected as indicated by the arrow I. It enters the optical surface side of the optical element 15 and causes flare. On the other hand, as described above, by forming the upward tapered surface 6a on the inner peripheral portion of the metal plate 6, the light incident on the inner peripheral portion of the metal plate 6 can be obtained as shown in FIG. As shown by the arrow II, the light is reflected by the tapered surface 6a and deviates from the optical surface of the optical element 15, and the generation of stray light can be suppressed.

  In addition, as the shape of the inner peripheral part of the metal plate 6, not only the upward tapered surface 6a is formed as described above, but, for example, as shown in FIGS. Accordingly, a downward tapered surface 6a may be formed on the inner peripheral portion, or a chamfered portion 6b may be formed on both upper and lower end portions.

In the present embodiment, the thickness t of the metal plate 6 is
0.1mm ≦ t ≦ 0.4mm
It is said.

  This is because if the thickness t of the metal plate 6 is greater than 0.4 mm, the optical element 15 can be centered without causing cracks or chipping, so the significance of integrally forming the optical element 15 with the thin metal plate 6 is reduced. Because. Similarly, when the thickness t of the metal plate 6 is larger than 0.4 mm, the rigidity of the metal plate 6 does not decrease even when a discontinuous member (with slits) as described in the conventional example is used. This is because the roundness, flatness, etc. required for the above are maintained. The reason why the thickness t is set to 0.1 mm is that if the thickness t is smaller than this, the rigidity of the metal plate 6 becomes low and it becomes difficult to incorporate it into the lens frame.

12A to 12C are views showing the appearance of the metal plate 6 used in this embodiment.
Then, the optical element 15 (not shown) is integrally and closely joined to the central holes 26, 27, and 28 of the various metal plates 6 to obtain the optical component 7. However, it can also be grasped as a figure in which the transparent optical element 15 is integrally tightly bonded.

  In the present embodiment, black chrome treatment is performed on the front surface, back surface, and inner and outer peripheral surfaces of the metal plate 6 to prevent stray light from being generated. That is, as shown in FIG. 11B described above, the generation of stray light can be suppressed to some extent by providing the tapered surface 6 a on the inner peripheral portion of the metal plate 6. However, it is still difficult to reliably prevent the generation of stray light. Therefore, in this embodiment, the metal plate 6 is subjected to black metal plating.

  By the way, this processing needs to be performed before molding. That is, this process must be able to withstand, for example, the glass forming temperature. On the other hand, in black nickel plating or black chromate (zinc plating), there is a possibility that the plating may be peeled off or faded after forming. Therefore, in the present embodiment, the surface of the metal plate 6 (including the back surface and the inner and outer peripheral portions) is subjected to black chrome treatment.

  When the pressing load at the time of molding is increased in order to improve the surface accuracy of the optical element 15 and the bonding strength, a force for expanding the inner diameter of the metal plate 6 acts, and the metal plate 6 is warped and swelled. In order to prevent this, ribs 25 are formed in advance on the outer periphery of the metal plate 6 to increase the rigidity of the metal plate 6.

  FIG. 12A shows an embodiment in which a large number (eight in the figure) of protrusions 23 are provided at substantially equal intervals from the center of the optical axis of the metal plate 6. In the figure, the protrusion 23 is formed to have a length shorter than the width w of the metal plate 6, but the protrusion 23 may be formed over the entire width w. This protrusion 23 increases the rigidity of the metal plate 6. The metal plate 6 including the protrusions 23 is subjected to black chrome treatment.

  12B, a large number (eight in the figure) of ribs 24 project radially from the center of the optical axis of the metal plate 6 at substantially equal intervals. In this embodiment, the rib 24 has a substantially trapezoidal cross section. The rib 24 increases the rigidity of the metal plate 6. The metal plate 6 including the protrusions 23 is subjected to black chrome treatment.

In FIG. 12 (c), the rib 25 is projected over the entire outer periphery of the metal plate 6.
In the present embodiment, the thickness of the metal plate 6 when the rib 25 is present is the thickness of the portion excluding the rib 25. The rib 25 strengthens the bonding with the optical element 15 while increasing the rigidity of the metal plate 6. The metal plate 6 including the ribs 25 is subjected to black chrome treatment. In addition, although the metal-plating process was given to the metal plate 6 of FIG. 12, it cannot be overemphasized that you may give to the other metal plate 6 mentioned above.

(A) (b) is sectional drawing which shows the structural example of the shaping | molding apparatus of embodiment of this invention. It is a figure which shows the external appearance of the optical component which concerns on this invention. (A)-(d) is a figure which shows the joining state of an optical element and a metal plate. It is a figure which shows the definition of the thickness of a metal plate in case the thickness of a metal plate is changing in the radial direction. It is a figure which shows the presence or absence of the crack of the optical element by the difference in thickness deviation. It is a figure which shows the expansion of Fig.3 (a). (A)-(e) is a top view of the metal plate of the various shapes used by this embodiment. It is a figure which shows the joining state of an optical element and a metal plate. It is a figure which shows the result of having investigated the presence or absence of generation | occurrence | production of the curvature according to the difference of the internal diameter and outer diameter of a metal plate. (A)-(c) is a figure which shows the shape of the inner peripheral part of a metal plate. (A) shows the case where the light hitting the inner peripheral part of the metal plate is reflected inward and becomes stray light, and (b) shows the light hitting the tapered surface of the inner peripheral part of the metal plate reflected outside. It is a figure which shows the case where generation | occurrence | production of a stray light is prevented. (A) is a figure which shows the state by which many protrusions were radially provided from the optical-axis center of the metal plate at substantially equal intervals, (b) is a figure with many ribs radially from the optical-axis center of a metal plate at substantially equal intervals. The figure which shows the state protruded, (c) is a figure which shows the state from which the rib protruded over the whole outer periphery of a metal plate.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Molding apparatus 2 Upper mold | type 2a Molding surface 3 Lower mold | type 3a Molding surface 4 Sleeve type | mold 5 Thermoplastic material 6 Metal plate 6a Tapered surface 7 Optical component 10 Pressure shaft 11 Hole 12 Notch 13 Hole 14 Notch 15 Optical element 16 Folding Curved portion 17 Hole 18 Notch 19 Protrusion 20 Regular polygonal hole 21 Hole 22 Groove 23 Protrusion 24 Rib 25 Rib

Claims (12)

In the optical component formed by tightly bonding the optical element and the frame integrally,
When the thickness in the optical axis direction at the innermost peripheral part of the frame is a, and the thickness in the optical axis direction of the part in contact with the frame at the outer peripheral part of the optical element is b,
a ≦ b
Having a relationship
An optical component characterized by that. The frame is made of metal;
The optical component according to claim 1. If the ratio of the thickness of the optical axis center of the optical element to the thickness of the outer peripheral portion is the thickness deviation X,
1.4 ≦ X ≦ 10
Having a relationship
The optical component according to claim 1. When the linear expansion coefficient of the optical element at a temperature of 100 ° C. to 300 ° C. is α ₁ and the linear expansion coefficient of the frame is α ₂ ,
α ₂ ≦ α ₁
Having a relationship
The optical component according to any one of claims 1 to 3. The frame is formed with at least one of a regular polygonal hole, groove, or notch that is symmetrical about the optical axis.
The optical component according to claim 1, wherein the optical component is an optical component. When the inner diameter when the frame body is a disk with holes is d and the outer diameter is D,
D ≧ d + 1.8 mm (however, d ≦ 20)
Having a relationship
The optical component according to claim 1, wherein the optical component is an optical component. On the inner periphery of the frame, a taper surface of 0 to 60 ° is formed with respect to a plane substantially orthogonal to the optical axis.
The optical component according to claim 1, wherein the optical component is an optical component. When the thickness of the frame is t,
0.1mm ≦ t ≦ 0.4mm
Having a relationship
The optical component according to claim 1, wherein the optical component is an optical component. Black chrome treatment is applied to the surface of the frame,
The optical component according to any one of claims 1 to 8. Ribs are formed on the frame,
The optical component according to claim 1, wherein the optical component is an optical component. The frame body is connected in the circumferential direction around the optical axis,
The optical component according to any one of claims 1 to 10. By pressing a softened plastic material sandwiched between a pair of opposing molds, an optical surface is transferred to the plastic material, and an optical element is molded, and a frame disposed around the plastic material is provided. In the method of manufacturing an optical component that is tightly bonded integrally with the optical element in the step of pressing the plastic material,
Forming the thickness in the optical axis direction at the innermost peripheral portion of the frame body to be equal to or less than the thickness in the optical axis direction of the portion in contact with the frame body at the outer peripheral portion of the optical element;
An optical component manufacturing method characterized by the above.