JP3059529B2 - Lens body - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lens body in which a resin layer is integrally formed on the surface of a glass member.

[0002]

2. Description of the Related Art When a conventional lens body is incorporated into a lens barrel, the outer peripheral surface of the lens body is fitted into the inner peripheral surface of the lens barrel in a light press-fit state so that the center of the optical axis of the lens body is in the lens mirror. A method has been adopted in which the lens body is made to coincide with the center of the optical axis of the cylinder, and then the lens body is fixed to the lens barrel with a holding ring or the like.

[0003]

However, in the above conventional example, when the lens body is pressed into the lens barrel, the inner peripheral surface of the lens barrel is shaved by the outer peripheral surface of the lens body, and the shavings are removed. There has been a problem that it adheres to the optical function part of the lens body. In particular, since the lens body is usually an insulator, shavings are attracted to static electricity generated on the surface of the lens body and are more easily adhered.

In addition to the above problems, unnecessary light rays reflected on the inner wall of the lens barrel enter the lens body and deteriorate the optical performance of the entire lens. A light-shielding line is provided to prevent light reflected by the inner wall of the lens barrel from entering the lens body. Therefore, when the lens barrel is made of metal, it takes time and effort to process the light-shielding line, and even when molding with a resin material,
Since the shape of the mold becomes complicated, there is a problem that the cost of the lens is hindered.

SUMMARY OF THE INVENTION Accordingly, the present invention has been made in view of the above-described problems, and has as its object the object of the present invention, in addition to the original optical function, is that shavings of the lens barrel adhere to the optical function section. It is an object of the present invention to provide a lens body having a function other than the original function, such as a function of preventing the incident light and a function of preventing unnecessary light from entering the lens body.

[0006]

Means for Solving the Problems The above-mentioned problems are solved,
In order to achieve the object, a lens body of the present invention is a glass member made of a glass material having an optical function surface, wherein a resin material is added to the optical function surface to make the optical function surface aspherical. A lens body having an aspherical optical element together with a member, wherein the resin material is dropped on a mold surface for forming the aspherical shape, and the glass member is placed thereon, and the resin material is applied by energy irradiation. At the same time as the molding of the aspherical surface, a circumferential groove for dust removal is integrally formed at an outer peripheral position of the optical functional surface of the aspherical surface.

[0007]

[0008]

As described above, since the lens body according to the present invention is constituted, by giving the lens body an additional function other than the original function, the function conventionally provided in the lens barrel side is provided on the lens body side. And the cost of the lens barrel can be reduced. In addition, when the outer peripheral portion of the resin layer performs a dustproof function, it is possible to prevent shavings and the like from adhering to the lens body.

[0009]

Preferred embodiments of the present invention will be described below in detail with reference to the accompanying drawings. (First Embodiment) FIG. 1 is a view showing a schematic structure of a molding apparatus used for molding a lens body of an embodiment.

First, before describing the configuration of a molding apparatus, the outline of a molding method for molding a lens body according to an embodiment will be described. The molding method for molding the lens body of this embodiment is to form a shape that is difficult to process with a glass material on the surface of a glass material. A resin layer having a desired complicated surface shape made of a resin material. As an example, there is a method in which an aspherical resin film is formed on a surface of a glass member processed into a spherical shape, and an aspherical lens is formed by combining a glass material and a resin material. That is, in order to provide a lens body with aberration corrected by a single lens, it is necessary to make the surface shape of the lens body aspherical, but it is not easy to process a glass material into an aspherical shape, and In a lens body using a resin that can be easily formed into an aspherical shape, it is difficult to gain the power of the lens. Therefore, by combining the two, it is intended to take advantage of only the advantages of both. The lens body manufactured in this manner is called a replica lens.

More specifically, as shown in FIG. 1, a bonding surface 30a which is one surface of a glass member 30 whose surface is processed into a spherical shape.
Next, a resin layer 32 made of a thin film of an active energy ray-curable resin is formed. The glass member 30 has a flange-shaped body portion 30b on an outer peripheral portion thereof. The body portion 30b is held on the support member 14 in a state in which the body portion 30b is in contact with the upper end surface 14b of the support member 14. ing. The upper end surface 14b protrudes by a height h from the edge of the molding surface 12b of the mold member 12 for forming the surface shape of the resin material. The protrusion amount h defines a predetermined thickness even at a portion where the thickness of the resin layer 32 is the thinnest (the thickness of the resin layer varies depending on the location because the molding surface 12b has an aspheric shape). Then, the resin material in a liquid state filled in the space defined by the molding surface 12b of the mold member 12 and the bonding surface 30a is irradiated with active energy rays to cure the resin material, and the replica lens is cured. Is completed.

Hereinafter, the configuration of an apparatus for forming and processing a lens body according to an embodiment will be described with reference to FIG. Reference numeral 10 denotes a mold member 12 for molding the resin layer 32.
And a substrate for holding a support member 14 for supporting the glass member 30 and the like, and is provided horizontally with respect to the ground. On the upper surface of the substrate 10, a mold member 12,
The support member 14 and the mold 16 are supported, and the substrate 1
An air cylinder 20 for moving the support member 14 relative to the mold member 12 is disposed on the lower surface of the cylinder 0.

More specifically, a mold 1 having a column-shaped concave portion 16a which is opened vertically upward at the center in the upper surface of the substrate 10.
6 is fixed. Inside the cylindrical concave portion 16a,
Having an outer diameter slightly smaller than the inner diameter of the recess 16a,
A cylindrical support member 14 is inserted. That is, the support member 14 is slidable along the axial direction (that is, along the vertical direction in the drawing) with respect to the mold 16 in a state where the outer peripheral surface is fitted to the inner peripheral surface of the concave portion 16a. It is inserted. The support member 14 has a lower end surface 1.
4a is prevented from moving further downward by contacting the bottom surface 16b of the concave portion 16a.

Inside the support member 14, a cylindrical mold member 1 having an outer diameter slightly smaller than the inner diameter of the support member 14 is provided.
2 are further inserted, and the support member 14 and the mold member 1
Reference numeral 2 indicates that the outer peripheral surface of the mold member 12 and the inner peripheral surface of the support member 14 are relatively slidable in a state where they are slidably fitted to each other. Here, since the bottom surface 12a of the mold member 12 is fixed to the bottom surface 16b of the concave portion 16a, the support member 14 defines the inner peripheral surface and the outer peripheral surface of the mold member 12 with the outer peripheral surface of the mold member 12, respectively. While being guided by the inner peripheral surface of the reference numeral 16, it is slidable in the vertical direction.

On the other hand, an air cylinder 20 for vertically moving the support member 14 with respect to the mold member 12 and the mold frame 16 is fixed to the lower surface of the substrate 10.
The air cylinder 20 has an air cylinder body 20
The cylinder rod 20b has a cylinder rod 20b that moves relatively to the cylinder a. A cylindrical fixing member 22 for connecting to the support member 14 is attached to an upper surface of the cylinder rod 20b. And these cylinder rods 20
b and the fixing member 22 are formed in the through hole 10 formed in the substrate 10.
Through a, it is connected to a mechanism member disposed above the substrate 10.

The outer periphery of the fixing member 22 has a flange 2
2a are formed, and connection rods 24A, 24B, 24C are formed at three circumferential positions on the upper surface of the flange portion 22a.
(Only 24C is not shown) is fixed in an upright state. The upper ends of the connecting rods 24A, 24B, 24C are formed with three through holes 16c,
16d and 16e (only 16e is not shown), respectively, 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 operates and the fixing member 22 moves upward, the supporting member 1 is connected via the connecting rods 24A, 24B, 24C.
4 will be pushed upward.

FIG. 1 shows the state in which the support member 14 is pushed up most. In this state, the upper end surface 14b of the support member 14 is formed on the molding surface 12b of the resin material which is the upper surface of the mold member 12. It protrudes from the edge by the protruding amount h. Here, since the molding surface 12b of the mold member 12 has a portion processed into an aspherical shape required for the completed shape of the lens body 33, the upper end surface 14 of the support member 14 is formed.
In a state where the glass member 30 is placed on the glass member 30b, the resin material filled in the space defined by the bonding surface 30a and the molding surface 12b of the glass member 30 is cured, so that the surface of the glass member 30 The resin layer 32 to which the aspherical shape of the molding surface 12b is transferred can be formed.

At this time, as can be seen from the drawing, 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 is accurately determined. In order to define, the contact surface 2
2b is formed. When the contact surface 22b contacts the lower surface 16f of the mold 16, the support member 1
4 is defined. Here, the value of the protrusion amount h is
The thickness of the resin layer 32 is set to a value at which the thickness of the resin layer 32 does not become thinner than, for example, 30 μm at a position where the thickness of the resin layer 32 becomes thinnest, depending on the degree of the aspherical surface of the molding surface 12b.

An escape portion 14c is formed at the upper end portion of the support member 14 for accommodating the protruding portion of the resin material, thereby preventing the protruded resin material from adhering to the support member 14. Glass member 30 and support member 1
4 prevents the resin material from protruding from the contact portion with the upper end surface 14b to form burrs.

A connecting rod 2 is provided between the lower surface 16f of the mold 16 and the upper surface of the flange portion 22a of the fixing member 22.
The compression springs 26A, 26B, 26C (only 26C is not shown) are arranged in a state of being loosely fitted to the outer circumferences of 4A, 24B, 24C.
6 is urged in a direction in which the lower surface 16f is pushed down. Therefore, when the operation of the air cylinder 20 is released, the cylinder rod 20b and the fixing member 22 are pushed down by their own weight and the urging force of the compression springs 26A, 26B, 26C, and the support member 14 It moves downward with respect to the member 12 and the mold 16. Thereby, the upper end surface 14b of the support member 14 is lowered to the same height as the molding surface 12b of the mold member 12,
The support state of the glass member 30 by the support member 14 is released.

An irradiation device 34 for irradiating active energy rays is disposed above the glass member 30.
By irradiating the resin layer 2, the resin layer 32 can be cured. The irradiation device 34 is supported by a moving mechanism 36, and can be retracted from the optical axis of the glass member 30 as necessary.

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

Next, a procedure for molding a lens body in the molding apparatus configured as described above will be described. In molding the lens body 33, first, it is necessary to supply a resin material to the molding surface 12b of the mold member 12. FIG.
FIG. 4 is a diagram showing a procedure of a supply operation of the resin material.

First, the moving mechanism 38 is operated to position the supply device 40 with respect to the mold member 12 such that the tip of the syringe 44 is located at the center of the molding surface 12b. FIG. 2A shows this state. From this state, the lifting mechanism 42 is operated as shown in FIG.
The syringe 44 is lowered so as to approach the molding surface 12b, and stopped just before the tip of the syringe 44 contacts the molding surface 12b. In this state, as shown in FIG.
The resin material is discharged little by little from the tip of the syringe 44, and simultaneously with the start of the discharge or after a predetermined time has elapsed from the start of the discharge, the syringe 44 is slowly raised as shown in FIG. The discharging operation of the resin material is continued even when the syringe 44 is raised, and the discharging operation is terminated when the supply amount of the resin material reaches a predetermined value. However, the discharge speed of the resin material and the rising speed of the syringe 44 at this time are set to such a speed that the resin material is not interrupted between the molding surface 12b and the tip of the syringe 44 when the syringe 44 is raised. You. Thereafter, when the syringe 44 reaches a predetermined height, the lifting mechanism 42
Stop the operation of.

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

First, referring to FIG.
The height H1 from the molding surface 12b of the distal end of the is 44 mm, and the syringe 44 is moved from this position to V1 = 100 mm.
/ S, and the tip of the syringe 44 is
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. 2B, the resin material is started to be discharged from the syringe 44 at a speed of 3.5 × 10 ⁻³ cc / s, as shown in FIG. Syringe 44
When a resin material of 3.5 × 10 ⁻³ cc is discharged from the tip of the resin material and the resin material contacts the molding surface 12b,
Start slowly raising the syringe 44. The rising speed at this time is 0.2 mm / s. This syringe 44
2D, the discharge operation of the resin material is continuously performed as shown in FIG. 2D, and after 4 seconds from the start of the discharge of the resin material, an appropriate supply amount of the resin material is obtained. The discharge of a certain 14 × 10 ⁻³ cc ends. At this time, the distal end of the syringe 44 is at a height of 1.7 mm from the molding surface 12b, but thereafter, the ascending operation of the syringe 44 is continued, and the distal end of the syringe 44 is moved from the molding surface 12b to 6 mm.
Stop at the position where mm is reached. After that, syringe 44
Is raised at a high speed, and as shown in FIG.
Returning to the same position as the position shown in (a), the step of supplying the resin material is completed.

The following two effects can be obtained by performing the above-described steps of supplying the resin material. (1) Since the resin material is brought into contact with the molding surface 12b in a ball-like state due to its surface tension without dropping the resin material 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 falling.

(2) If the ejection is continued at a position close to the molding surface 12b, a ball of the resin material is formed so as to wrap the tip of the syringe 44 by the surface tension of the resin material. The resin material adheres to the tip of 44,
The supply will be inaccurate. On the other hand, when the tip of the syringe 44 is raised with the ejection,
The resin material is prevented from adhering to the tip of the device, and the supply amount of the resin material can be accurately controlled.

Regarding (1), in the step of placing the glass member 30 on the support member 14 after the step of supplying the resin material, it is conceivable that air bubbles may be mixed in the resin material. Therefore, in each step, it is extremely important to manage so that air bubbles are not mixed. Even if the air bubbles are of a degree that does not affect the optical performance, if air bubbles that can be visually confirmed are mixed in, it will not be possible to ship them as a product, thus improving the product yield. It is also important above.

Regarding (2), since the amount of the 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 adjusted to a fixed amount. It is important to control In this regard, by adopting the above-described method, the volume of the supplied resin material can be accurately controlled to a constant amount.

Here, for example, when the weight of the resin material is controlled at the time of supply, even if the weight is constant,
Since the volume of the resin material greatly changes depending on the temperature and the humidity, it is necessary to set the temperature between the joining surface 30a and the molding surface 12b so as to spread the resin material to all corners and to prevent the protrusion amount from increasing. And the humidity must be strictly controlled. Therefore, it is most preferable to control the supply amount of the resin material by volume.

When the supply of the resin material is completed, the moving mechanism 3
By operating 8, the supply device 40 is retracted from the optical axis of the glass member 30. Then, as shown in FIG. 1, the support member 14 is raised by operating the air cylinder 20, and the upper end surface 14 b of the support member 14 protrudes from the edge of the molding surface 12 b of the mold member 12 by the protrusion amount h. To In this state, the upper end surface 14b of the support member 14 is coated with the coupling member 30a coated with a coupling agent for preventing the resin layer 32 from peeling off.
Is placed so that At this time, the glass member 30 is carefully laid so that the resin material spreads to every corner without mixing of bubbles in the space defined by the bonding surface 30a of the glass member 30 and the molding surface 12b of the mold member 12. Place.

When the operation of placing the glass member 30 on the support member 14 is completed, the moving mechanism 36 is operated to move the irradiation device 34 on the optical axis of the glass member 30. The resin layer 32 is irradiated with ultraviolet rays as active energy rays through the glass member 30. By this irradiation, the resin layer 32 starts to harden.

Here, not only UV-curable resins but also adhesives generally shrink in volume upon curing. Therefore, when the glass member 30 is held by the support member 14 until the resin layer 32 is completely cured, the contraction of the resin layer 32 causes the gap between the resin layer 32 and the bonding surface 30 a of the glass member 30. , Or peeling off from the molding surface 12b. To solve this,
In one embodiment, the support state of the support member 14 is released as shown in FIG. 3 in a state where the resin layer 32 has hardened to such a degree that the glass member 30 can be held.
By doing so, the glass member 30 can move as the resin layer 32 shrinks, so that the peeling phenomenon can be prevented.

To explain this in one specific example, when the above-mentioned urethane-modified acrylate and an ultraviolet-curable resin containing acrylate as a monomer component are used as the resin material, first, The center wavelength of the resin layer 32 is 365 n by the fluorescent lamp.
m of ultraviolet rays at an irradiation intensity of 30 mW / cm ² for 30 seconds. The irradiation energy amount per 1 cm ² by this first irradiation is 30 mW × 30 sec = 900 mWs
= 900 mJ, and the degree of polymerization of the resin material at this time is:
As shown by a white circle on the graph showing the relationship between the irradiation energy and the degree of polymerization in FIG. 4, it is about 70%. About 70% polymerization degree
In this state, the resin layer is no longer in contact with the glass member 30 even if the support of the glass member 30 by the support member 14 is released.
The hardness of the molding surface 12b has reached a level that does not cause misalignment. However, even in this state, if force is applied from outside,
It is possible to move the glass member 30 with respect to the mold member 12.

When the irradiation of the first stage is completed, the operation of the air cylinder 20 is released as shown in FIG. 3, and the support state of the glass member 30 by the support member 14 is released. Thereafter, a high-pressure mercury-xenon lamp, which is another light source in the irradiation device 34,
Similarly, ultraviolet light having a center wavelength of 365 nm is irradiated at 100 mW / c.
Irradiate at an irradiation intensity of m ² for 60 seconds. The irradiation energy amount per 1 cm ² by this second stage irradiation is 100 mW
× 60 sec = 6000 mJ, and the total irradiation energy amount with the first stage irradiation energy amount is 69
00 mJ. The degree of polymerization corresponding to this irradiation energy amount is about 96% as shown by the black circle in FIG.

In the above example, the irradiation intensity and the irradiation time are set so that the degree of polymerization of the resin material becomes 70% by the first-stage irradiation.
It is not limited to 0%, but is actually 50% to 90%.
The same effect can be obtained by setting in the range of%.
Then, the lens body 33 in which the curing of the resin layer 32 is completed is released from the mold member 12, and a predetermined coating (for example, an antireflection coating) is applied to the upper and lower surfaces to complete the lens body 33.

FIG. 5 is a partially enlarged view showing the molding surface of the mold member and the shape of the resin layer. In FIG. 5, the molding surface 1
The portion corresponding to the optical function portion (the portion inside the effective beam diameter) of the glass member 2b is processed into an aspherical shape for transferring a predetermined aspherical shape to the surface of the resin layer 32 as described above. ing. Further, a portion of the molding surface 12b corresponding to the outer peripheral portion of the optical function portion of the glass member 30 is provided with a circumferential convex portion 1.
2c is formed. Therefore, the completed lens body 33
In the resin layer 32, an aspherical portion 32a (first functional portion) having an original function of correcting the aberration is formed at a portion corresponding to the optical functional portion of the glass member 30. On the outer peripheral portion of the aspherical portion 32a, a circumferential groove portion 32b having a function different from the function of correcting aberration is provided.
(A second functional unit) is formed.

Here, the completed lens body 33 is mounted with its outer peripheral surface 30c lightly pressed into the inner peripheral surface 48a of the lens barrel 48, as shown in FIG. for that reason,
During this press-fitting, the outer peripheral surface 30c of the lens body 33 scrapes the inner peripheral surface 48a of the lens barrel 48, and shavings of the lens barrel 48 are generated. And the lens body 33
Since the glass member 30 and the resin layer 32 forming the resin layer are generally insulators, static electricity is easily generated, and the problem that shavings of the lens barrel 48 adhere to the effective beam diameter of the resin layer 32 occurs. I do.

The groove 32b formed in the resin layer 32 traps shavings of the lens barrel 48, and
This is for preventing shavings from adhering to the effective beam diameter of No. 2. In addition to the shavings, dust and the like may accumulate on the inner peripheral surface of the lens barrel 48, so that it is possible to prevent the dust from adhering to the effective light beam diameter of the resin layer 32.

(Second Embodiment) FIG. 7 is a view showing the shape of a lens body 33A according to a second embodiment of the present invention. First
In the second embodiment, the circumferential groove 32b is formed as the second functional part in the resin layer 32. However, the lens body 33A of the second embodiment is formed by resin instead of forming the groove 32b. The layer 32 has a convex portion 32c formed thereon. In this case, since the convex portion 32c serves as a wall, shavings and dust from the inner peripheral surface of the lens barrel 48 fall within the effective beam diameter of the resin layer 32 just like the first embodiment. Adherence can be prevented.

(Third Embodiment) FIG. 8 is a view showing the shape of a lens body 33B of a third embodiment. The lens body 33B according to the third embodiment includes an aspherical portion 32a of the resin layer 32.
Is formed with a light-shielding line portion 32d as shown in the figure. As described above, the light shielding line portion 3 is formed on the outer peripheral portion of the resin layer 32.
By providing 2d, it is possible to prevent light rays reflected on the inner peripheral surface of the lens barrel 48 from being incident on the lens body 33 and the lens group behind it. for that reason,
Conventionally, the function of the light-shielding line formed on the inner surface of the lens barrel 48 can be provided on the lens body side, and accordingly, the light-shielding line on the inner surface of the lens barrel 48 is not required. Can be achieved.

It should be noted that the present invention can be applied to a modification or modification of the above embodiment without departing from the gist thereof. For example, in the above-described embodiment, the case where a lens body having a convex surface is formed has been described. However, the present invention can be applied to a case where a lens body having a concave surface is formed.

Further, in the above embodiment, the case where the ultraviolet ray-curable resin is used as the active energy ray-curable resin has been described. However, the present invention is not limited to this. A mold resin may be used. Further, in the above-described embodiment, the case has been described in which the portion for preventing shavings and dust and the light-shielding line portion are formed in the resin layer. However, other functions may be provided. Although the case where the aspherical surface is formed on the surface of the resin layer has been described, a spherical shape may be formed.

[0046]

As described above, since the lens body according to the present invention is constituted, by giving the lens body an additional function other than the original function, the function conventionally provided on the lens barrel side can be obtained. And the cost of the lens barrel can be reduced. When the outer peripheral portion of the resin layer performs a dustproof function,
There is an effect that shavings and the like can be prevented from adhering to the lens body.

[Brief description of the drawings]

FIG. 1 is a view showing a configuration of an optical element molding apparatus according to one embodiment.

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

FIG. 3 is a view showing a state where a support member of the molding apparatus shown in FIG. 1 is released.

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

FIG. 5 is a partially enlarged view of a mold member and a lens body.

6 is a diagram showing an example in which the lens body of FIG. 5 is attached to a lens barrel.

FIG. 7 is a diagram showing a lens body according to a second embodiment.

FIG. 8 is a diagram illustrating a lens body according to a third embodiment.

[Explanation of symbols]

 Reference Signs List 10 substrate 12 mold member 14 support member 16 mold frame 20 air cylinder 22 connecting member 24 connecting rod 26 compression spring 30 glass member 32 resin layer 33 lens body 33A lens body 33B lens body 34 irradiation device 36 moving mechanism 38 moving mechanism 40 supply device 42 Elevating mechanism 44 Syringe 46 Drive

──────────────────────────────────────────────────続 き Continuation of the front page (51) Int.Cl. ⁷ Identification code FI // B29K 33:04 105: 32 B29L 11:00 (56) References JP-A-60-144710 (JP, A) 60-159401 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) G02B 3/00 B29C 35/08 B29C 39/10 B29C 39/40 G02B 7/02

Claims (1)

(57) [Claims] 1. A glass comprising a glass material having an optical function surface.
A resin material is added to the optical function surface of the
Aspherical surface with the glass member with an aspherical functional surface
A lens body as an optical element , wherein the resin material is provided on a mold surface for molding the aspherical shape.
Is dropped, and the glass member is placed on the
Same as the molding of the aspherical shape by the resin material
Occasionally, the outer peripheral position of the aspheric optical function surface is used to remove dust.
Wherein the circumferential groove is integrally formed .