JP2003191260A - Manufacturing device of resin film joined lens, and resin film joined lens - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To obtain a resin film joined lens having excellent transferability and not causing a resin break portion, a foam and the like. <P>SOLUTION: A guide member 11 guiding a core 10 and also guiding a lens 1 to which a resin film 2 is joined has a lens guide part 11a and a core guide part 11b formed, and the diameter of opening of the lens guide part 11a is larger than that of the core guide part 11b. A stepped wall 13 is formed between the lens guide part 11a and the core guide part 11b. While the lens 1 is displaced by the action of a pressing member 15, in the direction wherein it approaches a transfer surface 10a of the core 10, in a process wherein a resin 18 is cured by ultraviolet rays, the lens 1 lowers to a position where it comes into contact with the stepped wall 13, and lens face 1a is kept in a state of noncontact with the transfer surface 10a. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for manufacturing a resin film cemented lens, in which a resin film is formed on a spherical lens surface in order to impart a predetermined characteristic to the lens, for example, to make a spherical lens aspherical. The present invention relates to a resin film cemented lens.

[0002]

2. Description of the Related Art Lenses formed as aspherical lenses for improving aberrations are widely used as lenses used in various optical instruments. Aspherical lenses can be manufactured by molding, but since the material glass must be melted at a high temperature and molded, repeated molding of the lens damages the transfer surface of the mold due to heat. Accordingly, there is a problem that the manufacturing cost of the aspherical lens becomes extremely high because the transfer accuracy is lowered. From the above, for example, JP-A-63-1
As disclosed in Japanese Laid-Open Patent Publication No. 57103, a resin film cemented lens in which a resin film is bonded to the surface of a spherical lens formed by a normal polishing means, and the surface of the resin film has an aspherical shape has been widely used. Are known.

In this known resin film cemented lens, a liquid resin is supplied to the surface of a mold having a transfer surface having a desired aspherical surface, and the spherical lens is brought into contact with the resin to apply the resin. It is manufactured by applying pressure to transfer the shape of the transfer surface onto the resin. Then, the resin film is bonded to the lens by maintaining the pressed state and curing the resin. As the resin, an ultraviolet curable resin, a thermosetting resin, or the like is used, and heating is not necessary, or even if heated, the temperature is low, and the temperature is much lower than the temperature at which the optical glass melts. Since there is little damage to the die due to heat and the transfer accuracy does not decrease even after repeated use, there are advantages that an aspherical lens can be manufactured at low cost.

[0004]

By the way, if the aspherical lens has a low aspherical coefficient, for example, a parabolic surface or an elliptic surface, even if the mold according to the prior art described above is used, its transfer The surface shape can be transferred to the resin with high accuracy. However, when an attempt is made to form a resin film having a high-order aspherical coefficient, for example, a sixth-order or higher-order aspherical coefficient, accurate transfer accuracy may not always be obtained.

That is, as shown in FIG. 6, the spherical lens L
In bonding the resin film R to the spherical lens surface Ls, the shape of the transfer surface T of the mold M is such that the curvature of the central portion is smaller than the radius of curvature of the lens surface Ls. It is assumed that the radius of curvature of the peripheral portion is larger than the radius of curvature of the lens surface Ls. The shape of the transfer surface T is a concave curved surface as a whole, but an annular projection P is formed between the central portion and the peripheral portion.

In order to make the surface of the resin film R bonded to the lens L follow the transfer surface T of the mold M, a liquid resin is used for the mold M.
The lens L is abutted on the resin, and a pressing force F is applied to the lens L to extend the lens L so as to extend over substantially the entire circumference and shape of the transfer surface T. Is transferred, and the resin is cured while being kept under pressure. Curing of the resin is performed, for example, by heating (in the case of a thermosetting resin), irradiation of ultraviolet rays (in the case of an ultraviolet curable resin), or the like.

During the process of hardening the resin interposed between the lens L and the mold M, the volume contraction of the resin occurs and the pressing force F presses the lens L toward the mold M. Therefore, when the volume of the resin contracts, the thickness of the resin decreases. Here, the gap between the transfer surface T and the lens surface Ls is not uniform, and the shape is such that it is closest to the position of the ridge P, and the distance is widened toward the central portion and the outer peripheral side. ing. When the resin contracts under the action of the pressing force F and its thickness decreases, the lens L approaches the mold M, and as a result, the gap between the ridge P and the lens surface Ls is extremely small. Therefore, the area inside the ridge P is substantially sealed. If the resin continues to shrink from this state, the air contained in the resin and the air interposed between the resin and the lens L and the mold M are not discharged in the sealed central portion. In addition, since the pressure decreases due to the volume decrease of the resin in this central portion, the air inside expands and the thickness of the resin becomes the largest, and the resin tends to concentrate at the center position which is the lowermost portion. As a result, as shown in FIG. 7, bubbles B are generated, and as the resin shrinks further, the bubbles grow and grow.
Since the air bubbles are in a negative pressure state because they are present in the sealed region, the resin comes to be drawn toward the center portion, and the force for bringing the lens L into pressure contact with the mold M acts. For this reason, the protruding portion P of the transfer surface T is pressed against the lens surface Ls of the lens L, and a resin cut portion C in which the resin is cut at that position occurs.

As described above, when the resin film R laminated on the lens surface Ls has a resin cut portion and even a small amount of bubbles in the center portion, spherical aberration and coma aberration occur, and the optical performance remarkably deteriorates. It is also difficult to see from the outside. In the case of forming a resin film having a low-order aspherical surface, for example, a parabolic surface, since the above-described ridges and the like do not exist at the intermediate position of the transfer surface of the mold,
There are no resin breaks or bubbles. That is, such a problem is peculiar when manufacturing an aspherical lens having a higher-order aspherical coefficient in which the above-mentioned ridges are present. The same phenomenon also occurs when the radius of curvature of the lens surface is smaller than the radius of curvature of the transfer surface of the mold.

In order to provide a diffraction grating on the lens,
It is also known that a resin film is bonded to the lens surface. Here, the resin film forming the diffraction grating is formed of a large number of minute concavities and convexities formed in concentric circles. Therefore, in forming the diffraction grating on the spherical lens, the same problem will occur when the resin films are bonded by the above-described method.

The present invention has been made in view of the above points, and an object of the present invention is to provide a resin film cemented lens which has excellent transferability and does not generate a resin cut portion or bubbles. And to provide a manufacturing apparatus therefor.

[0011]

In order to achieve the above-mentioned object, the structure of the resin film cemented lens manufacturing apparatus according to the present invention is such that one side surface of a glass lens is used as a resin film cemented surface. A device for bonding a transparent resin film to a film-bonding surface so that the lens has a predetermined characteristic, and transferring a predetermined shape to the surface of the resin bonded to the resin-film bonding surface of the lens. A guide member having a core having a transfer surface, a core guide portion into which the core is fitted, and a lens guide portion into which the outer periphery of the lens is inserted and guided in a direction facing the transfer surface of the core. A pressure for pressing the surface of the lens opposite to the resin film bonding surface in order to press the resin interposed between the resin film bonding surface of the lens and the transfer surface of the core. Members,
A lens holding means provided on the lens guide portion of the guide member and capable of holding the lens at a predetermined position; and the core, with the lens held by the lens holding means, the transfer surface and the The present invention is characterized in that it comprises core positioning means for holding the lens in a non-contact state over the entire surface.

Further, as the constitution of the resin film cemented lens in the present invention, a transparent resin film having an uneven surface is formed on the lens surface of the glass lens in order to give the lens predetermined characteristics. In the joined resin film-bonded lens, the portion of the resin film having the minimum film thickness is the lens surface and the transfer surface of the molding member for transferring the uneven shape of the resin film to the lens surface. It is defined by the minimum distance between the resin film, and this minimum distance is characterized by being matched with the minimum distance through which the resin forming the resin film can flow.

Here, the resin film bonded to the lens is for imparting predetermined optical characteristics to the lens. For example, in the case of a spherical lens, a resin film is bonded in order to make it an aspherical surface. When this aspherical surface is used, the aspherical surface coefficient becomes extremely advantageous when the aspherical surface coefficient is a sixth order or higher order. Further, for example, the one in which a resin film having an uneven shape for integrally providing a lens with a diffraction grating is bonded to the lens surface is included.

In any case, the resin film bonded to the lens surface does not cause partial resin breakage at the time of bonding, and prevents the generation of bubbles and the like. The resin in the plastic state is pressed by the pressing member to be expanded so as to spread over the entire surface between the lens and the core, and the shape of the transfer surface is transferred. In this state, the resin is cured by irradiation with ultraviolet rays or heating, but the volume of the resin decreases during this curing. The pressure applied to the lens reduces the distance between the lens and the core according to the contraction of the resin, but since the core is fixedly held by the core holding means,
The lens is close to the core. However, when the distance between the lens and the core is reduced to some extent, the lens is held by the lens holding means and the lens is brought into a non-contact state over the entire transfer surface of the core. In other words, even if the resin contracts during curing, as long as the resin is still in a fluid state, the projecting portion on the transfer surface of the core does not contact the resin film forming surface of the lens, and the resin between the lens and the core It can flow through a minimum distance.

If the minimum distance between the protrusion on the transfer surface of the core and the surface of the lens on which the resin film is formed is too small, a substantially airtight state will be created between them, and it will be impossible to prevent resin breakage and air bubble generation. On the other hand, if the minimum distance is made too large, the resin will still shrink even after the distance between the lens and the core is fixed, which will affect the transfer accuracy of the transfer surface. Further, since the resin generally absorbs light of low wavelength component, it is not preferable to give the resin film bonded to the lens a thickness more than necessary. The minimum film thickness of the resin film varies depending on the properties and viscosity of the resin, but if the film thickness is 0.2 μm or less, resin breakage may occur. On the other hand, the maximum film thickness is 300 μm or less from the viewpoints of transfer accuracy and prevention of attenuation of transmitted light as a lens. That is, the minimum film thickness of the resin film, that is, the minimum distance between the protrusion on the transfer surface of the core and the resin film formation surface of the lens is 0.2 μm to
The range is 300 μm, and the range of 5 μm to 15 μm is most desirable.

The lens holding means can be composed of, for example, a step wall formed in the lens guide portion. Further, the core positioning means for positioning the core at a predetermined position passes through the lens guide portion of the guide member and projects from the surface of the guide member, and the lens is held by the lens holding means. Then, the transfer surface is in a non-contact state over the entire surface of the lens, and a second position for keeping the minimum film thickness of the resin film and a third position for separating the lens from the second position by a predetermined distance. It can be constituted by an elevating and lowering drive means which can be positioned at and. Further, the pressurizing member can be composed of a weighting member for exerting its own weight on the lens. When the weighting member is rotatably fitted to the guide member, the load member is rotated to extend the resin. Will be good. Further, the resin supplied to the core cannot be accurately formed unless the amount of the resin supplied to the core is larger than the amount necessary to form the necessary resin film. Therefore, at the time of starting the pressurization by the pressurizing member, the surplus resin is made to collect outside the effective area of the lens so that the resin can be supplied between the lens and the core when the resin is cured. There must be. For this purpose, an annular space in which the resin overflows may be formed between the outer peripheral portion of the transfer surface and the inner peripheral portion of the guide member in the core.

[0017]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described in detail below with reference to the drawings. First, FIG. 1 shows the structure of a resin film cemented lens. In the figure, 1 is a lens, 2 is a resin film 2 bonded to this lens 1, and these constitute a resin film cemented lens 3. The lens 1 is made of glass, and the lens surface 1a on one side thereof is a spherical lens having a spherical shape. The resin film 2 is bonded to the lens surface 1a, and the lens surface 1a becomes the resin film forming surface. Here, the resin film 2 is bonded to make it an aspherical surface in order to improve the aberration in the spherical lens.

Here, the surface of the resin film 2 has an uneven shape, and when the radius of curvature of the lens surface 1a of the lens 1 is R1, the radius of curvature is a predetermined angle on the inner peripheral side of the resin film 2. Is a radius of curvature R smaller than the radius of curvature R1 of the lens 1
The radius of curvature R3 is larger than the radius of curvature R1 of the lens 1 on the outer peripheral side. Therefore,
From the curved surface having the radius of curvature R2 of the resin film 2 to the radius of curvature R3
The transitional part to the curved surface becomes the thinnest minimum film thickness part 2a. The thickness of this minimum film thickness portion 2a is 0.2 μm to 300 μm.
m, more preferably in the range of 5 μm to 15 μm.

An apparatus configuration for forming the above resin film cemented lens 3 is shown in FIGS. In the figure, 10
Indicates a core, and the upper surface of the core 10 serves as a transfer surface 10a. The core 10 is inserted into the guide member 11, and a core elevating member 12 is provided below the core 10 so as to be connected thereto. The core lifting member 12 is, for example, a cam,
It is driven up and down by a lifting drive means (not shown) such as a feed screw. The core lifting member 12 is shown in FIG.
So that it can be displaced to the first height position indicated by HP, the second height position indicated by SP, and the third height position indicated by LP, and can be positioned and held at each position. Has become. When the core elevating / lowering member 12 is at the first position indicated by HP, the transfer surface 10a of the core 10 has the guide member 1
It is arranged at a position higher than the upper surface of 1. The second position indicated by SP is an operating position where the resin film 2 is bonded to the lens 1. Further, the third position indicated by LP is a position slightly below the second position, and the core 10 is located at this position.
By lowering, the transfer surface 10a of the core 10 can be released from the resin film 2. Therefore, the core elevating / lowering member 12 constitutes a core positioning means for positioning the core 10 at a predetermined height position during resin film bonding.

The guide member 11 serves to guide the core 10 and also the lens 1 to which the resin film 2 is bonded. That is, the guide member 11 is provided with a through hole penetrating in the vertical direction, the upper side of this through hole is a lens guide portion 11a for guiding the lens 1, and the core 10 is located at a lower position of this lens guide portion 11a. Is a core guide portion 11b for guiding the. Further, a lower portion of the core guide portion 11b serves as an elevating guide portion 11c that elevates and guides the core elevating member 12. The lens guide portion 11a has a larger hole diameter between the lens guide portion 11a and the core guide portion 11b, and the step wall 13 is provided between the lens guide portion 11a and the core guide portion 11b.
Is formed. The lens 1 descends to a position where it abuts the step wall 13, but when it abuts the step wall 13, it cannot descend any further.
3 constitutes a lens holding means.

The lens 1 has a predetermined effective diameter, and is used as a mounting portion for a lens frame on the outer peripheral side of this effective diameter.
There is a blank area that does not function as a lens. The transfer surface 10a of the core 10 covers at least the entire effective diameter of the lens 1. The shape of the transfer surface 10a has a concave curved surface as a whole, but the radius of curvature of the central portion matches the radius of curvature R2 shown in FIG. 1, and the outer peripheral portion matches the radius of curvature R3. The transition from the radius of curvature R2 to the radius of curvature R3 is an annular protrusion 10aP. Further, on the outer peripheral side of the transfer surface 10a of the core 10, a chamfered portion 10b is formed which is inclined obliquely downward. Therefore, the chamfered portion 10b and the guide member 11 are formed.
A predetermined annular space is formed between the core guide portion 11b and the inner surface of the core guide portion 11b. This space serves as an overflow portion 14 into which surplus resin flows.

Further, in the figure, 15 is a pressing member. The pressure member 15 has a cap shape having a predetermined weight, and the lens 1 is attached to the canopy portion 15a.
The light guide opening 16 having a diameter slightly smaller than the outer diameter of the guide member 11 is formed, and the peripheral body portion 15b is rotatably fitted to the outer surface of the guide member 11. In addition, in the figure, reference numeral 17 denotes an ultraviolet irradiation means, and the ultraviolet light emitted from this ultraviolet irradiation means 17 is the canopy portion 15 of the pressing member 15.
The lens 1 and the core 10 through the light guide opening 16 provided in a.
The resin interposed between and can be irradiated.

Next, a method of bonding the resin film 2 to the lens 1 will be described with reference to FIG. First, as shown in FIG. 4 (a), the core 10 is lifted by the core lifting member 12.
To a position where the transfer surface 10a is moved to the guide member 1
It is made to project from the upper surface of 1. In this state, a release agent is applied to the transfer surface 10a. If the release film is formed on the transfer surface 10a of the core 10, the release agent may not be applied. Then, as shown in FIG. 4B, the transfer surface 10
The resin 18 is supplied to a. The resin used here is a thermosetting resin, an ultraviolet curable resin, or the like, and may be a resin curable by radiation other than ultraviolet rays. In the following description, it will be described as using an ultraviolet curable resin,
Needless to say, it is not limited to this.
The supplied resin 18 is in a liquid state, or is in a state in which it can be easily plastically deformed at least when the lens 1 is pressed by the pressing member 15.

The core 10 is, as shown in FIG.
The core elevating member 12 lowers the position to SP, and then the lens 1 is inserted into the lens guide portion 11a of the guide member 11 as shown in FIG. Lens 1
Is inserted into the lens guide portion 11a with the lens surface 1a facing downward, and the resin 18 contacts the lens surface 1a. However, in this state, the lens surface 1a of the lens 1 has the lens guide portion 11a and the core guide portion 1a.
It is in a state of being lifted up from the step wall 13 between 1b.

Further, as shown in FIG. 4E, the pressing member 15 is fitted to the guide member 11. by this,
The canopy portion 15a of the pressing member 15 is the lens surface 1a of the lens 1.
Since the lens 1 comes into contact with the surface on the opposite side, the lens 1 is pressed in the direction of pressing the resin 18. However, the pressure member 1
If the gravity of 5 is applied, the centering between the lens 1 and the core 10 may not be performed accurately, the resin 18 may not spread evenly, and air may be entrained. Therefore, the pressure member 15 is rotated to rotate the lens 1 so as to follow it, so that the fluidized resin 18 is sufficiently adapted to the transfer surface 10a of the core 10 and the lens surface 1a of the lens 1. While homogenizing, air is exhausted between them. Here, if an excessive pressing force is applied when the pressure member 15 rotates, the resin 18 may be partially broken. Therefore, it is desirable to rotate without applying a pressing force substantially. The resin 18 extends toward the outer peripheral side of the core 10 under the load of the pressure member 15, but the excess resin flows into the overflow portion 14.

An ultraviolet irradiation means 17 is arranged above the light guide opening 16 formed in the canopy portion 15a of the pressing member 15. Therefore, as shown in FIG. 4F, ultraviolet rays are irradiated toward the lens 1. Since the glass lens 1 transmits ultraviolet rays, the resin 18 is irradiated with ultraviolet rays. As a result, the resin 18 is cured by the action of the irradiated ultraviolet rays to form the resin film 2 in which the shape of the transfer surface 10a is transferred.

Here, the resin 18 shrinks in the process of curing the resin 18 by ultraviolet rays. Since the lens 1 is pressed by the pressing member 15, the lens 1 is displaced in the direction of approaching the transfer surface 10 a of the core 10 as the resin 18 contracts. Therefore, the resin 18 is the lens surface 1a of the lens 1.
And the transfer surface 10a of the core 10 are also kept in close contact with each other. Then, at the final stage of curing the resin 18 by ultraviolet rays, the lens 1 contracts due to the contraction.
Contacts the step wall 13 between the lens guide portion 11a and the core guide portion 11b. As a result, a space is maintained between the lens surface 1a of the lens 1 and the transfer surface 10a of the core 10. In this state, the lens surface 1a is not in contact with the transfer surface 10a, and the annular projection 10 of the transfer surface 10a that is closest to the lens surface 1a and the transfer surface 10a.
Even at the position of aP, the lens surface 1a and the lens surface 1a are separated from each other by at least 0.2 μm and at most 300 μm.

As described above, the lens surface 1a and the transfer surface 10
Since it is kept in a non-contact state over the entire surface with a,
Even if the resin 18 contracts further during that time, the resin is drawn in from the outside of the annular protrusion 10aP, and a negative pressure is applied to the portion inside the annular protrusion 10aP.
There is no possibility of contact with the lens surface 1a to cause resin breakage or bubbles. Further, the contact of the lens 1 with the step wall 13 is almost at the final stage of curing, and since the excess resin is present in the overflow portion 14, the distance between the lens 1 and the core 10 does not change. Even if the resin 18 contracts, the surplus resin from the overflow portion 14 is replenished between the lens 1 and the core 10, so that the transfer accuracy of the resin 18 as a whole does not decrease.

When the curing of the resin 18 is completed, the transfer surface 10
The resin film 2 in which the shape of a is accurately transferred is formed. Therefore, as shown in FIG. 4G, the pressure member 15 is removed from the guide member 11. After that, as shown in FIG. 4H, the core elevating member 12 connected to the core 10 is once lowered to the LP position. Since the lens 1 is held by the step wall 13 and does not descend further, the core 10 descends independently. Since the transfer agent is previously applied to the transfer surface 10a, the resin film 2 is separated from the transfer surface 10a as the core 10 descends. As a result, the resin film 2 is released from the mold, the resin film 2 is bonded to the lens 1, and the resin film cemented lens 3 is obtained. Further, as shown in FIG. 4I, the core elevating member 12 moves the core 10 to the guide member 11
The resin film cemented lens 3 can be released from the guide member 11 by pushing it up to HP which is the upper position of FIG.
At (j), the resin film cemented lens 3 is taken out.

The above is the process of forming the resin film cemented lens 3. By repeating this step sequentially, the resin film cemented lens 3 in which the shape of the transfer surface 10a of the core 10 having a complicated uneven shape is accurately transferred to the resin film 2 because of having a high-order aspherical surface coefficient can be easily obtained. Moreover, it can be manufactured efficiently. Although the resin film bonded to the lens has been described as an aspherical surface of the spherical lens, for example, as shown in FIG.
It can also be applied to the case where 0a is joined to the diffraction grating 102 including a large number of concentric annular projections.

[0031]

EFFECTS OF THE INVENTION Since the present invention is constituted as described above, it is possible to obtain a resin film cemented lens which has excellent transferability and does not generate resin cut portions or bubbles.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of a resin film cemented lens showing an embodiment of the present invention.

FIG. 2 is a schematic configuration diagram showing an exploded view of an apparatus for manufacturing a resin film cemented lens of FIG.

FIG. 3 is an enlarged view of a main part of a resin film cemented lens manufacturing apparatus showing a state in which a resin film is bonded to a lens.

FIG. 4 is a process explanatory view showing the manufacturing process of the resin film cemented lens.

FIG. 5 is a sectional view of a resin film cemented lens showing another embodiment of the present invention.

FIG. 6 is a schematic configuration diagram of an apparatus for manufacturing a resin film cemented lens according to a conventional technique.

FIG. 7 is an operation explanatory view showing a process in which a resin is cured in a manufacturing process of a resin film cemented lens according to a conventional technique.

[Explanation of symbols]

1,100 lens 1a, 100a lens surface 2 Resin film 2a Minimum film thickness part 3 Resin film cemented lens 10 core 10a Transfer surface 10aP Annular protrusion 10b Chamfer 11 Guide member 11a Lens guide part 11b Core guide part 12 core lifting member 13 step wall 14 Overflow part 15 Pressurizing member 16 Light guide opening 17 Ultraviolet irradiation means 18 resin 102 diffraction grating

─────────────────────────────────────────────────── ─── Continuation of front page (51) Int.Cl. ⁷ Identification code FI theme code (reference) // B29K 105: 20 B29K 105: 20 709: 08 709: 08 B29L 9:00 B29L 9:00 11:00 11:00 (72) Inventor Yasuo Iizuka 700 Konaka-cho, Sano-shi, Tochigi Prefecture S-term Fuji Foki Co., Ltd. F-term (reference) 2H049 AA03 AA18 AA39 AA43 4F202 AD04 AF01 AG03 AG05 AG26 AH74 AH75 CA09 CB01 CB12 CK11 CK52 CL02 CQ01 4F204 AA36 AA44 AD04 AF16 AG03 AG05 AH74 AM32 EA03 EA04 EB01 EB11 EF05 EF36 EK10 EK24

Claims (10)

[Claims] 1. A device for bonding a transparent resin film to one surface of a glass lens as a resin film bonding surface so that the lens has predetermined characteristics. A core having a transfer surface for transferring a predetermined shape onto the surface of the resin bonded to the resin film bonding surface of the lens, a core guide portion into which the core is fitted, and a direction facing the transfer surface of the core. A guide member having a lens guide portion into which the outer periphery of the lens is inserted and guided; and to press the resin interposed between the resin film bonding surface of the lens and the transfer surface of the core. A pressing member that presses a surface of the lens opposite to the resin film bonding surface; and a lens holding unit that is provided in the lens guide portion of the guide member and that can hold the lens at a predetermined position, In front of the core A resin film-bonded lens comprising: a core positioning unit that holds the lens between the transfer surface and the lens in a non-contact state over the entire surface while the lens is held by the lens holding unit. Manufacturing equipment. 2. The apparatus for manufacturing a resin film cemented lens according to claim 1, wherein the lens is a spherical lens, and the resin film makes the spherical lens surface aspherical. . 3. The apparatus for manufacturing a resin film cemented lens according to claim 1, wherein the resin film is a diffraction grating cemented to a spherical lens surface of the lens. 4. The minimum distance between the lens when held by the lens holding means and the transfer surface of the core held by the core positioning means is 0.2 μm.
The resin film cemented lens manufacturing apparatus according to claim 1, wherein the resin film cemented lens has a thickness of about 300 μm. 5. The apparatus for manufacturing a resin film cemented lens according to claim 1, wherein the lens holding means is a step wall formed in the lens guide portion. 6. The core positioning means has a first position where the core passes through the lens guide portion of the guide member and projects from the surface of the guide member, and the lens is held by the lens holding means. In this state, the transfer surface is in a non-contact state over the entire surface of the lens, and a second position for ensuring the minimum film thickness of the resin film, and the second position with respect to the lens 2. The resin film cemented lens manufacturing apparatus according to claim 1, which is a core elevating means that can be positioned at a third position where it is separated by a predetermined distance. 7. The pressure member applies self-weight to the lens, and the pressure member is rotatably fitted to the guide member so that the resin supplied to the core is 2. The apparatus for manufacturing a resin film cemented lens according to claim 1, wherein the film thickness is made uniform. 8. The ring-shaped space in which resin overflows is formed between the outer peripheral portion of the transfer surface and the inner peripheral portion of the guide member in the core. Manufacturing equipment for resin film cemented lenses. 9. A resin-film-bonded lens comprising a glass lens and a transparent resin film having a concavo-convex surface formed on the lens surface of the resin film in order to provide the lens with predetermined characteristics. The portion of the minimum film thickness is defined by the minimum distance between the lens surface and the transfer surface of the molding member for transferring the uneven shape of the resin film onto the lens surface. A resin film cemented lens characterized in that the minimum interval is made to coincide with the minimum interval through which the resin forming the resin film can flow. 10. The minimum film thickness is 0.2 μm to 300 μm.
The resin film cemented lens according to claim 9, wherein m is m.