JPH04328705A - Lens barrel - Google Patents

Abstract

PURPOSE:To provide the lens barrel which accurately positions a lens even when the lens is fitted to an excess part of a resin material and never causes a decrease in picture quality due to the incidence of a light beam on the excess part. CONSTITUTION:The lens barrel 48 is provided with a resin layer 32 on a glass member 30 in one body for incorporating the lens and has a positioning part 48a for positioning the lens 33 by abutting on the outer peripheral part of the lens 33 and a light shield part 48c which is formed at the positioning member 48a and prevents the light beam from being incident on the excess part of the resin that the lens 33 has.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lens barrel for incorporating a lens having a resin layer integrally formed on the surface of a glass member.

0002

2. Description of the Related Art Conventionally, there has been known a method of forming a thin film made of a resin material on the surface of a glass member to form a lens having an aspherical shape that is difficult to process using glass material. Lenses molded by such a method are generally called replica lenses.

In molding this replica lens 55, as shown in FIG.
A glass member 50 processed into a spherical shape having a curvature close to the aspherical shape is placed on the mold member 52 having a shape of 1. A method is used in which a replica lens 55 having a desired aspherical shape is formed by filling a liquid resin into a space 54 defined between the two and hardening the resin.

[0004] In such a molding method, the molding surface 52
When filling the space 54 between the surface 50a of the glass member 50 and the surface 50a of the glass member 50 with the resin material, the excess resin material may slightly protrude from the edge portion of the molding surface 52a due to variations in the amount of the resin material. be. When the resin material protrudes in this way, the completed replica lens 55 has a protruding portion 55a of the resin material as shown in FIG.
will be formed.

[0005]

[Problems to be Solved by the Invention] However, as described above, the replica lens 55 having the protruding portion 55a
When the replica lens 55 is assembled into a conventional lens barrel 60 as shown in FIG. The problem is that it may be inaccurate. Further, since this protruding portion 55a has an irregular shape, this protruding portion 55a has an irregular shape.
When light is incident on 5a, undesirable diffused reflection and irregular refraction of the light ray occur at this portion, resulting in a problem of deterioration of image quality.

[0006] Therefore, the present invention has been made in view of the above-mentioned problems, and its object is to accurately position the lens even when a lens having a protruding portion of the resin material is attached, and to It is an object of the present invention to provide a lens barrel that prevents light rays from entering the protruding portion and deteriorating the image quality.

[0007]

[Means for Solving the Problems] In order to solve the above-mentioned problems and achieve the objects, the lens barrel of the present invention is a lens barrel for incorporating a lens integrally molded with a resin into a glass member. , a positioning part for positioning the lens by coming into contact with the outer periphery of the lens; and a light shielding part formed on the positioning part to prevent light rays from entering a protruding part of the resin of the lens. It is characterized by the following:

Furthermore, in the lens barrel according to the present invention, the resin is an active energy ray-curable resin.

[0009]

[Operation] Since the lens barrel according to the present invention is constructed as described above, the protruding portion of the resin material of the lens is accommodated in the relief portion, so that the protruding portion comes into contact with the positioning portion. It is possible to prevent inaccurate positioning of the lens. In addition, since the light shielding part is provided in front of the light incident side, this light shielding part works to block the light rays that enter the protruding part of the resin material of the lens, and can prevent the light rays from entering the protruding part. .

0010

DESCRIPTION OF THE PREFERRED EMBODIMENTS A preferred embodiment of the present invention will be described in detail below with reference to the accompanying drawings. FIG. 1 is a diagram showing a schematic structure of a molding apparatus for molding a lens attached to a lens barrel according to an embodiment.

First, before explaining the configuration of the molding apparatus, the outline of the molding method for molding the above-mentioned lens will be described. The molding method for forming this lens is to form a shape that is difficult to process with glass material on the surface of the glass material, and to form a shape that is difficult to process with glass material. This forms a resin layer with a desired complex surface shape. For example, an aspherical lens may be created by forming an aspherical resin film on the surface of a glass member processed into a spherical shape, and combining the glass material and the resin material. In other words, in order to provide a lens with aberrations corrected using a single lens, it is necessary to make the lens surface shape aspherical, but it is not easy to process glass material into an aspherical shape, and it is difficult to process a glass material into an aspherical shape. Lenses made of resin that can be easily molded into a spherical shape make it difficult to maximize lens power, so by combining the two, it is possible to take advantage of only the strengths of both. A lens manufactured in this way is called a replica lens.

Specifically, as shown in FIG. 1, a bonding surface 30a, which is one side of a glass member 30 whose surface is processed into a spherical shape,
Then, a resin layer 32 made of a thin film of active energy ray-curable resin is formed. The glass member 30 has a flange-shaped flange-shaped part 30b on its outer periphery, and is held on the support member 14 with the flange-like part 30b in contact with the upper end surface 14b of the support member 14. ing. This upper end surface 14b is for forming the surface shape of the resin material.
It protrudes from the edge portion of the molding surface 12b of the mold member 12 by a height h. This protrusion amount h determines that the resin layer 32 has a predetermined thickness even at the thinnest portion (since the molding surface 12b has an aspherical shape, the thickness of the resin layer varies depending on the location). And mold member 12
The liquid resin material filled in the space defined by the molding surface 12b and the bonding surface 30a is irradiated with active energy rays to harden the resin material, thereby completing the replica lens 33.

The configuration of an apparatus for molding a replica lens will be explained below based on FIG. 1. Reference number 10 indicates a substrate for holding a mold member 12 for molding the resin layer 32, a support member 14 for supporting the glass member 30, etc., and a substrate that extends horizontally. It is provided. A mold member 1 is provided on the upper surface of this substrate 10.
2. The support member 14 and the mold 16 are supported, and an air cylinder 20 is provided on the lower surface of the substrate 10 to move the support member 14 relative to the mold member 12. .

Specifically, the upper surface of the substrate 10 has a formwork 1 having a cylindrical recess 16a opening vertically upward in the center.
6 is fixed. Inside the columnar recess 16a,
having an outer diameter slightly smaller than the inner diameter of this recess 16a;
A cylindrical support member 14 is inserted. That is, this support member 14 is slidable along the axial direction (that is, along the vertical direction in the figure) with respect to the formwork 16 with its outer circumferential surface fitted into the inner circumferential surface of the recess 16a. It is inserted. Further, this support member 14 has a lower end surface 1
4a is prevented from moving further downward by coming into contact with the bottom surface 16b of the recess 16a.

Inside the support member 14 is a cylindrical mold member 1 whose outer diameter is slightly smaller than the inner diameter of the support member 14.
2 is further inserted, and the support member 14 and the mold member 1
2 means that the outer circumferential surface of the mold member 12 and the inner circumferential surface of the support member 14 are slidably fitted to each other and can be slid relative to each other. Here, since the mold member 12 has its bottom surface 12a fixed to the bottom surface 16b of the recess 16a, the support member 14 has its inner peripheral surface and outer peripheral surface connected to the outer peripheral surface of the mold member 12 and the mold frame, respectively. It is slidable in the vertical direction while being guided by the inner circumferential surface of 16.

On the other hand, an air cylinder 20 is fixed to the lower surface of the substrate 10 for moving the support member 14 in the vertical direction with respect to the mold member 12 and the mold frame 16. The air cylinder 20 has an air cylinder body 20 on its upper part.
The cylinder rod 20b has a cylinder rod 20b that moves relative to a, and a cylindrical connecting member 22 for connecting to the support member 14 is attached to the upper surface of the cylinder rod 20b. And these cylinder rods 20
b and the connecting member 22 are connected to the through hole 10 bored in the substrate 10.
It is connected to a mechanical member disposed on the upper side of the substrate 10 through a.

A flange portion 2 is provided on the outer circumference of the connecting member 22.
2a is formed, and connecting rods 24A, 24B, 24C are formed at three locations on the circumference of the upper surface of this flange portion 22a.
(only 24C not shown) is fixed in an upright state. The upper ends of these connecting rods 24A, 24B, 24C are
Through-holes 16c, 16 bored at three locations at the bottom of the formwork 16
d and 16e (only 16e is not shown), enters the cylindrical recess 16a, and is connected to the lower end surface 14a of the support member 14. Therefore, when the air cylinder 20 is actuated and the connecting member 22 moves upward, the supporting member 14 is pushed upward via the connecting rods 24A, 24B, and 24C.

FIG. 1 is a diagram showing the state in which the support member 14 is pushed up the most. In this state, the upper end surface 14b of the support member 14 is above the molding surface 12b of the resin material, which is the upper surface of the mold member 12. It protrudes from the edge portion by a protrusion amount h. Here, since the molding surface 12b of the mold member 12 is processed into an aspherical shape required for the completed shape of the replica lens 33, the glass member 30 is placed on the upper end surface 14b of the support member 14. By curing the resin material filled in the space defined by the bonding surface 30a and the molding surface 12b of the glass member 30, the aspherical shape of the molding surface 12b is transferred to the surface of the glass member 30. A resin layer 32 can be formed.

At this time, as can be seen from the figure, the protrusion amount h of the support member 14 defines the thickness of the resin layer 32 formed on the glass member 30, and this protrusion amount h can be accurately determined. In order to define the abutting surface 2 on the upper surface of the connecting member 22,
2b is formed. When this contact surface 22b comes into contact with the lower surface 16f of the formwork 16, the supporting member 1
A protrusion amount h of 4 is defined. Here, the value of the protrusion amount h is
Although it varies depending on the degree of asphericity of the molding surface 12b, the thickness of the resin layer 32 is set to a value that does not become thinner than, for example, 30 μm at the position where the resin layer 32 is the thinnest.

Note that a relief part 14c is formed at the upper end of the support member 14 to accommodate the protruding portion of the resin material, and prevents the protruding resin material from adhering to the support member 14. Glass member 30 and support member 1
This is to prevent the resin material from protruding from the contact portion with the upper end surface 14b of 4 and from forming burrs. Furthermore, connecting rods 24A, 24B,
With the compression springs 26A and 24C loosely fitted around the outer periphery of the
26B, 26C (only 26C is not shown) are arranged, so that the connecting member 22 can be connected to the lower surface 16f of the formwork 16.
It is biased in the direction of being pushed down. Therefore, when the operation of the air cylinder 20 is released, the cylinder rod 20b and the connecting member 22 absorb their own weight and
The support member 14 is pressed down by the urging force of the compression springs 26A, 26B, and 26C, and the support member 14 is
6, move downward. As a result, the support member 1
The upper end surface 14b of the mold member 12 is lowered to about the same height as the molding surface 12b of the mold member 12, and the state in which the support member 14 supports the glass member 30 is released.

An irradiation device 34 for irradiating active energy rays is arranged above the glass member 30, and this irradiation device 34 irradiates the resin layer 3 with active energy rays.
2, the resin layer 32 can be cured. This irradiation device 34 is supported by a moving mechanism 36 and can be retracted from the optical axis of the glass member 30 if necessary.

On the other hand, above the glass member 30, in addition to the irradiation device 34, there is a resin material supported by a moving mechanism 38 that allows the glass member 30 to move between a position on the optical axis and a retracted position. A supply device 40 is arranged. This supply device 4
0 is a vertical lifting mechanism 4 held by a moving mechanism 38
2, a syringe 44 supported by this elevating mechanism 42,
A driving device 46 for driving the piston of this syringe 44 is provided. The supply device 40 supplies a predetermined amount of the resin material to the molding surface 12b of the mold member 12.

Next, a procedure for molding a replica lens using the molding apparatus configured as described above will be explained. In molding the replica lens 33, it is first necessary to supply a resin material to the molding surface 12b of the mold member 12. FIG. 2 is a diagram showing the procedure of this resin material supply operation.

First, the moving mechanism 38 is operated to position the supply device 40 with respect to the mold member 12 so that the tip of the syringe 44 is located at the center of the molding surface 12b. FIG. 2(a) shows this state. From this state, as shown in FIG. 2(b), the lifting mechanism 42 is operated to lower the syringe 44 closer to the molding surface 12b, and stop just before the tip of the syringe 44 touches the molding surface 12b. let In this state, as shown in FIG. 2(c), the resin material is discharged little by little from the tip of the syringe 44, and at the same time as this discharge is started, or after a predetermined period of time has elapsed from the start of discharge, the syringe 44 is Raise slowly as shown in 2(d). Even when the syringe 44 is raised, the discharging operation of the resin material continues, and when the supply amount of the resin material reaches a predetermined value, the discharging operation is ended. However, the discharge speed of the resin material and the rising speed of the syringe 44 at this time are as follows:
The speed is set so that the resin material is not interrupted between the molding surface 12b and the tip of the syringe 44. Thereafter, when the syringe 44 reaches a predetermined height, the operation of the elevating mechanism 42 is stopped.

As a specific example of this resin material supply operation, urethane-modified acrylate and an ultraviolet curable resin containing acrylate as a monomer component are used as the resin material, and a central portion is placed on the surface of a glass lens having a diameter of 18 mm. A case of molding an aspherical resin layer having a thickness of 30 μm and a maximum thickness of 60 μm (the volume of the resin material supplied at this time is 14×10 −3 cc) will be described.

First, in FIG. 2(a), the syringe 44
The height H1 of the tip of the syringe 44 from the molding surface 12b is 100 mm, and from this position, the syringe 44 is
The tip of the syringe 44 is lowered at a speed of
As shown in (b), the height H2 = 1.1 from the molding surface 12b.
Stop at the position of mm. Next, in the state shown in FIG. 2(b), the resin material starts to be discharged from the syringe 44 at a speed of 3.5×10-3 cc/s, and as shown in FIG. 2(c), the resin material is discharged from the syringe 44. 3.5 x 10-3cc from the tip
of the resin material is discharged, and this resin material is applied to the molding surface 12b.
When the syringe 44 comes into contact with the syringe 44, the syringe 44 begins to rise slowly. The rising speed at this time is 0.2 mm/s. Even when the syringe 44 is raised, the dispensing operation of the resin material continues as shown in FIG. Discharge of the supplied amount of 14×10 −3 cc is completed. At this time, the tip of the syringe 44 is formed on the molding surface 12b.
The height is 1.7 mm from the syringe 4.
The upward movement of 4 continues and stops at the position where the tip of the syringe 44 is 6 mm from the molding surface 12b. Thereafter, the syringe 44 is raised at high speed and returns to the same position as shown in FIG. 2(a), as shown in FIG. 2(c), to complete the process of supplying the resin material.

By carrying out the resin material supply process as described above, the following two effects can be obtained. (1) The resin material is brought into contact with the molding surface 12b in a beaded state due to its surface tension without being dropped from a high position above the molding surface 12b. It is possible to prevent air bubbles from being mixed into the resin material due to the shock of dropping. (2) When discharging is continued at a position close to the molding surface 12b, a ball of resin material is formed to wrap around the tip of the syringe 44 due to the surface tension of the resin material, so the tip of the syringe 44 Resin material adheres to the parts, making the supply amount inaccurate. On the other hand, if the distal end of the syringe 44 is raised as it is discharged, the resin material will not adhere to the distal end of the syringe 44, and the supply amount of the resin material can be accurately controlled.

Regarding (1), it is conceivable that air bubbles may be mixed into the resin material even in the step of placing the glass member 30 on the support member 14 after the step of supplying the resin material. Therefore, it is extremely important to manage each process to prevent air bubbles from entering. Even if there are bubbles that do not affect optical performance, if bubbles that can be visually confirmed are mixed in, it will be impossible to ship the product, so it is important to improve the yield of the product. It is also important above.

Regarding (2), since the amount of resin material filled between the bonding surface 30a and the molding surface 12b of the glass member 30 is extremely small, the amount of the resin material is precisely controlled at a constant amount. It is important to control In this respect, by employing the method described above, the volume of the resin material to be supplied can be accurately controlled to a constant amount. Here, for example, if the weight of the resin material is controlled at the time of supply, even if the weight is constant, the volume of the resin material changes greatly depending on the temperature and humidity. 12b, it is necessary to strictly control the temperature and humidity in order to spread the resin material to every corner and to prevent the amount of overflow from increasing. Therefore, it is most preferable to control the supply amount of the resin material by volume.

When the supply of the resin material is finished, the moving mechanism 3
8 to move the supply device 40 away from the optical axis of the glass member 30. Then, as shown in FIG. 1, the air cylinder 20 is operated to raise the support member 14, so that the upper end surface 14b of the support member 14 protrudes from the edge portion of the molding surface 12b of the mold member 12 by a protrusion amount h. Make it. In this state, a glass member 30 coated with a coupling agent to make it difficult to peel off the resin layer 32 is placed on the upper end surface 14b of the support member 14 on the joint surface 30a.
Place it so that it is in contact with the At this time, carefully move the glass member 30 so that the resin material spreads to every corner within the space defined by the joint surface 30a of the glass member 30 and the molding surface 12b of the mold member 12 without mixing air bubbles. Place it.

[0031] Here, the resin material spreads to every corner of the space between the joint surface 30a and the molding surface 12b of the mold member 12,
Moreover, it is actually impossible to control the amount of this resin material so that there is no overflow. Therefore, a small amount of resin material inevitably protrudes from the edge of the molding surface 12b. If this protruding resin material adheres to the barreled portion 30b of the glass member 30, the replica lens 33 may be tilted with respect to the optical axis of the lens barrel when the completed replica lens 33 is assembled into the lens barrel. This results in a decrease in optical performance. Therefore, in order to prevent this protruding resin material from adhering to the wrapped portion 30b, the glass member 30 is provided with a protruding portion 30c of resin material between the outside of the effective beam diameter D and the wrapped portion 30b. (See Figure 5). The protruding portion 30c is formed by cutting the glass member 30 so as to form a steeper slope upward than the extension surface of the joint surface 30a of the glass member 30. The protruding resin material tends to move downward according to gravity, so by making the protruding portion 30c a steep slope facing upward, it is possible to prevent the resin material from wrapping around to the body-attached portion 30b. can.

A relief portion 14c is also formed at the upper end of the support member 14 to prevent the protruding resin material from adhering to the support member 14. When the work of placing the glass member 30 on the support member 14 is completed, the moving mechanism 36 is then activated to move the irradiation device 34 onto the optical axis of the glass member 30. Then, the resin layer 32 is irradiated with ultraviolet rays as active energy rays through the glass member 30 . Due to this irradiation, the resin layer 32 begins to harden.

[0033] In addition to UV-curable resins, adhesives generally shrink in volume when cured. Therefore, if the glass member 30 is held by the support member 14 until the resin layer 32 is completely cured, the shrinkage of the resin layer 32 will cause a gap between the resin layer 32 and the bonding surface 30a of the glass member 30. , or peeling may occur between the molded surface 12b and the molded surface 12b. In order to solve this problem, in one embodiment, as shown in FIG.
The supporting state of the supporting member 14 is released. In this way, the glass member 30 can move as the resin layer 32 contracts, so that peeling phenomenon can be prevented.

To explain this as a specific example, when the above-mentioned urethane-modified acrylate and an ultraviolet curing resin containing acrylate as a monomer component are used as the resin material, first, the inside of the irradiation device 34 is A fluorescent lamp illuminates the resin layer 32 with a center wavelength of 365n.
Ultraviolet light of m is irradiated for 30 seconds at an irradiation intensity of 30 mW/cm2. The amount of irradiation energy per 1cm2 in this first stage irradiation is 30mW x 30sec = 900mW
s=900 mJ, and the degree of polymerization of the resin material at this time is about 70%, as shown by the white circle on the graph showing the relationship between irradiation energy and degree of polymerization in FIG. Degree of polymerization is about 70
%, the resin layer has reached such a hardness that even if the support of the glass member 30 by the support member 14 is released, misalignment between the glass member 30 and the molding surface 12b will no longer occur. However, even in this state, it is possible to move the glass member 30 relative to the mold member 12 by applying force from the outside.

When the first stage of irradiation is completed, the operation of the air cylinder 20 is released as shown in FIG. 3, and the state in which the glass member 30 is supported by the support member 14 is released. After this, the resin layer 32 is exposed to a high pressure mercury xenon lamp, which is another light source in the irradiation device 34.
Similarly, ultraviolet rays with a center wavelength of 365 nm are applied at 100 mW/c.
Irradiate for 60 seconds at an irradiation intensity of m2. The amount of irradiation energy per 1 cm2 in this second stage of irradiation is 100
mW x 60 sec = 6000 mJ, and the total irradiation energy amount including the first stage irradiation energy amount is:
It becomes 6900mJ. The degree of polymerization corresponding to this amount of irradiation energy is about 96%, as shown by the black circles in FIG. 4, and is in a substantially completely cured state.

In the above example, the irradiation intensity and irradiation time are set so that the degree of polymerization of the resin material is 70% in the first stage of irradiation, but the set value of this degree of polymerization is 70%.
%, in fact, 50% to 90%
A similar effect can be obtained by setting within the range of . Then, the replica lens 33 whose resin layer 32 has been cured in this manner is released from the mold member 12, and a predetermined coating (for example, anti-reflection coating) is applied to the upper and lower surfaces to complete the replica lens 33. FIG. 5 is a diagram showing the completed shape of this replica lens 33.

Next, FIG. 6 is a diagram showing an example of a lens barrel to which this replica lens 33 is attached. In FIG. 6, the lens barrel 40 includes the replica lens 3 described above.
This replica lens 3
A positioning portion 40a is provided for defining the center position of the lens 3 and the position along the optical axis. Furthermore, an escape part 40b is formed in the resin protrusion part 30c of the replica lens 33 to accommodate the protruding resin material. The entrance side of the lens barrel 40, that is, the front of the replica lens 33 has an inner diameter that is slightly larger than the effective diameter of the incident light ray, and prevents the light ray from entering the resin protruding portion 30c. A light shielding section 40c is provided for this purpose.

In this way, by providing the relief part 40b in the lens barrel 40 to accommodate the protruding portion of the resin material, and further providing the light shielding part 40c in front of the light incident side, the replica lens 33 is made into a lens mirror. It can be accurately positioned with respect to the tube 40, and it also prevents undesirable diffused reflection and irregular refraction of the light rays caused by the light rays being incident on the protruding parts of the resin material having an irregular surface shape. This can prevent deterioration of image quality.

In the above embodiment, the case of molding a replica lens having a convex surface has been described, but the method for molding the optical element of the embodiment is exactly the same when molding a replica lens having a concave surface. Applicable to FIG. 7 shows a molding apparatus for molding a replica lens 33 having a concave surface, which is similar to the molding apparatus shown in FIG. However, the other configurations and molding operations are exactly the same as those of the molding apparatus shown in FIG.

Further, FIG. 8 shows the completed shape of the replica lens 33 having a concave surface, and similarly to the replica lens 33 having a convex surface, it has a body part and a relief part for the resin material. Further, FIG. 9 is a diagram showing a lens barrel to which a replica lens 33 having a concave surface is attached, and, just like the lens barrel 40 shown in FIG. It has a relief part to prevent light from entering the resin protruding part, and a light shielding part to prevent light from entering the protruding part of the resin.

The present invention can be applied to modifications or variations of the above embodiments without departing from the spirit thereof. For example, in the above embodiment, a case was explained in which an ultraviolet curable resin is used as the active energy ray curable resin, but the invention is not limited to this, and an X-ray curable resin or an infrared curable resin may be used. You may also use

[0042] In addition, the conditions such as the discharge speed and the moving speed of the syringe when supplying the resin material to the mold member, and the conditions such as the irradiation intensity and irradiation time when irradiating ultraviolet rays are as shown in the above example. is one preferred example, and the present invention includes:
The conditions are not limited to those shown in the above examples. In addition, although we explained that the resin material is supplied to the mold member and then the glass member is placed on the support member, if a hole for resin supply is made in the mold member, it is possible to place the glass member on the support member. It is also possible to later supply a resin material into the space between the glass member and the mold member.

Alternatively, the resin may be supplied to a glass member instead of the mold member, and the glass member to which the resin has been supplied may be placed on the support member. Moreover, although the case of forming a replica lens has been described, the present invention is similarly applicable to other types of optical elements as long as a resin layer is formed on the surface of a glass material.

[0044] Also, although the case where an air cylinder and a spring are used to move the support member up and down has been explained, it is also possible to replace these with an elevating mechanism such as a combination of a ball screw, a stepping motor, or a DC servo motor. Needless to say, it's a good thing. Further, although the explanation has been given in which the mold member is fixed and the support member is moved up and down with respect to the mold member, it is also possible to fix the support member and move the mold member up and down.

[0045]

As explained above, according to the lens barrel of the present invention, the protruding portion of the resin material of the lens is accommodated in the relief portion, so that the protruding portion comes into contact with the positioning portion, and the lens This has the effect of preventing inaccurate positioning. In addition, since the light shielding part is provided in front of the light incident side, this light shielding part works to block the light rays that enter the protruding part of the resin material of the lens, and can prevent the light rays from entering the protruding part. There is an effect.

[Brief explanation of drawings]

FIG. 1 is a diagram showing the configuration of a replica lens molding apparatus.

FIG. 2 is a diagram showing the procedure of a resin material supply operation.

FIG. 3 is a diagram showing a state in which the support member of the molding apparatus shown in FIG. 1 is released;

FIG. 4 is a diagram showing the relationship between the amount of irradiation energy and the degree of polymerization.

FIG. 5 is a diagram showing the completed shape of a replica lens having a convex surface.

FIG. 6 is a diagram showing a lens barrel of one embodiment.

FIG. 7 is a diagram showing the configuration of a molding apparatus for a replica lens having a concave surface.

FIG. 8 is a diagram showing the completed shape of a replica lens having a concave surface.

9 is a diagram showing an example of a lens barrel to which the replica lens of FIG. 8 is attached; FIG.

FIG. 10 is a diagram showing a conventional molding device.

FIG. 11 is a diagram showing a conventional lens barrel.

[Explanation of symbols]

10　　　　　　　Substrate 12 Mold parts 14 Supporting member 16 Formwork 20 Air cylinder 22 Connecting member 24 Connecting rod 26 Compression spring 30 Glass parts 32 Resin layer 33 Replica lens 34 Irradiation device 36　　　　　　Movement mechanism 38 Moving mechanism 40 Supply device 42 Lifting mechanism 44 Syringe 46 Drive device 48 Lens barrel

Claims (2)

[Claims] 1. A lens barrel for incorporating a lens integrally molded with a resin into a glass member, the lens barrel comprising: a positioning part for positioning the lens by abutting on the outer peripheral part of the lens; What is claimed is: 1. A lens barrel comprising: a light shielding portion that is formed and prevents light rays from entering a protruding portion of resin of the lens. 2. The lens barrel according to claim 1, wherein the resin is an active energy ray-curable resin.