JP2886224B2 - Compound optical element manufacturing equipment - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for manufacturing a composite optical element that forms an aspherical shape by coating a glass or plastic substrate surface with a resin.

[Conventional technology]

In recent years, an aspherical lens in which a glass or plastic base material surface is coated with a resin has been used in part. The following invention is disclosed as an apparatus for manufacturing this aspheric lens.

For example, in the invention described in Japanese Patent Application Laid-Open No. 62-227711, as shown in FIG. 5, bell-toys 101 and 106 having a bell-clamp structure for determining the center of the spherical glass lens 103 are disposed to face each other. The molding surface is fitted with an aspherical mold 105 and is centered by the fitting. In addition, the Beruja Toy 101 has a U that emits UV light.
A V light source 102 is provided inside.

The conventional apparatus having the above configuration is used to
Is placed on the molding surface of the mold 105, and the spherical glass lens 103 is further placed thereon. Next, the spherical glass lens 1
03 is clamped and centered, and resin 104 is molded 105
Spread according to the molding surface of. An apparatus that emits UV light from the UV light source 102 to cure the resin has been proposed.

[Problems to be solved by the invention]

However, in the device according to the related art, since the centering of the spherical glass lens 103 (hereinafter, referred to as a base material) is performed by a bell clamp structure, the base material having a small curvature (large radius of curvature) compared to the outer diameter is used. The centering function did not work, and the shape of the substrate was limited. Further, since the resin diameter is clamped on the R surface of the base material, the resin diameter cannot be made larger than the Beruyer diameter, and the resin diameter is restricted. Furthermore, since the mold is fixed, the distance between the resin-formed surface of the base material 103 and the molding surface of the mold 105 is constant, so that the variation in the thickness of the base material is a molded product, that is, the composite optical element after molding. There was a disadvantage that affected the wall thickness.

Therefore, the present invention has been developed in view of the above-mentioned drawbacks in the prior art, and is a composite optical device that performs centering by clamping the outer periphery of a base material and solves the thickness variation in the composite optical element after molding. It is intended to provide a device manufacturing device.

[Means for solving the problem]

The present invention relates to a composite optical element manufacturing apparatus for forming an energy-curable resin layer on a substrate of an optical element, wherein a cylinder having a desired optical shape as a molding surface is vertically movable and a cylinder holding the substrate. A rotatable holding table is provided,
A centering portion for holding the outer periphery of the substrate is provided.

[Action]

ADVANTAGE OF THE INVENTION The manufacturing apparatus of the composite optical element which concerns on this invention can perform centering irrespective of the curvature radius of a base material, and can make the thickness in the composite optical element after shaping | molding constant.

〔Example〕

Hereinafter, an embodiment of a composite optical element manufacturing apparatus according to the present invention will be described in detail with reference to the drawings.

(First Embodiment) FIGS. 1 to 3 show a first embodiment of an apparatus for manufacturing a composite optical element according to the present invention. FIG. 1 is a partially longitudinal side view, and FIG.
The figure is a plan view of the centering portion, and FIG. 3 is a partially enlarged sectional view.

Reference numeral 1 denotes a device. The device 1 has a support 3 standing on a lower base 2, and an upper base 4 is mounted on an upper end of the support 3. A cylinder 5 is fixedly provided at the center of the upper surface of the upper base 4. A rod 6 is fitted to the cylinder 5 so as to be movable up and down. An upper end of the rod 6 is provided with a stopper 7 and a pulse motor 8 for controlling the position of the stopper 7.

A sliding base 9 is attached to the lower end of the rod 6. A part of the sliding base 9 is slidably fitted to the column 3 and is configured to be vertically movable using the column 3 as a guide. On the lower surface of the sliding base 9, a column 10 is erected.
A mold base 11 is attached to a lower end of the mold base 11, and a mold 12 having a desired optical shape as a molding surface is fixed to a lower surface of the mold base 11. A cylinder 13 is fixedly provided at the center of the lower surface of the sliding base 9, and a mold base 11 and a mold 12 are configured to be vertically movable by a rod 14 from the cylinder 13 with a support 10 as a guide.

The cylindrical holder 15 is loosely fitted on the lower base 2 coaxially with the mold 12, and is rotatably provided via a belt 17 by a motor 16 mounted on the lower surface of the lower base 2. Also,
The base material receiving surface 15a at the upper end of the holding table 15 is configured to be perpendicular to the axis of the mold 12. Below the holding table 15, a UV irradiator 18
Is installed on a frame 19 suspended from the lower surface of the lower base 2.

Reference numeral 20 denotes a centering three-point claw chuck fixed to the lower base 2. The claw 20 a of the chuck 20 is provided near the base material receiving surface 15 a at the upper end of the holding base 15, and is mounted at the lower portion of the lower base 2. It is configured to be opened and closed via a belt 22 by a worn motor 21.

A substantially L-shaped claw 23 is fixedly mounted on the upper portion of the chuck 20 so as not to contact the mold 12.

A cylinder 24 that can move back and forth is provided on the upper surface of the lower base 2, and a cylinder 25 is attached to an upper portion of the cylinder 24. Vertically movable rod fitted to cylinder 25
A resin discharge device 27 is attached to 26.

Base material receiving surface 15a of holding table 15 of apparatus 1 having the above configuration
Then, a substrate 28 made of glass or plastic whose outer periphery is processed to a desired accuracy is supplied. Molded surface of this substrate 28
The cylinders 24 and 25 are operated at the center of 28a to apply an appropriate amount of resin 29 from the resin discharge device 27. Next, the claws 20a of the chuck 20 driven by the motor 21 move toward the center of the base member 28, and each claw 20a clamps the outer periphery of the base member 28 to perform centering as shown in FIG.

Thereafter, the cylinder 5 is operated to lower the mold 12 and the resin 29
Stop at the position immediately before contact with. Then, the holding table 1 is rotated by the motor 16 so that the resin 29 is evenly spread on the molding surface 28a.
By rotating the stopper 7 with the pulse motor 8 while rotating 5 and changing the amount of protrusion of the stopper 7, the mold 12 is lowered at a low speed and brought into contact with the resin 29, and the resin 29 is molded.
Expand to 28a. Next, UV light is irradiated from below the base material 28 by the UV irradiator 18 to cure the resin 29 expanded in the shape of the mold 12. At this time, the resin 29 is slightly cured and reduced. In order to make the mold 12 follow this reduction, the cylinder 13
The pulse motor 8 is rotated and the mold 12 is lowered while keeping the pressure applied at a constant value.

When the mold 12 is released, the mold 12 is raised by the cylinder 5 and protrudes outward from the outer peripheral surface of the mold 12 (see FIG. 3).
The outer peripheral surface side of the base material 28 is brought into contact with a release claw 23 provided to have a slight gap with the base material 28 (see FIG. 2).
As a result, cantilever stress is applied to the mold 12 and the resin 29, and the substrate
Separate 28.

According to this embodiment, workability during molding of the composite optical element can be improved by clamping the outer periphery of the base material 28. Furthermore, by centering with the chuck 20,
It is possible to cope with a change in the diameter of the base material 28.

(Second Embodiment) FIG. 4 is a second embodiment of a composite optical element manufacturing apparatus according to the present invention.
It is a top view of the centering part which shows an Example.

This embodiment is different from the first embodiment in that the centering chuck 20 is replaced with a fixed V block 30 and a V block 30.
And a block 31 movably in the front-rear direction toward the V groove 30a. The other configuration is the same, and the description of the configuration is omitted.

In this embodiment, the substrate 28 is supplied to the V groove 30a of the fixed V block 30, and the block 31 is pressed against the substrate 28 to perform centering. Hereinafter, the operation is the first
The operation is similar to that of the embodiment, and the description of the operation is omitted.

According to the present embodiment, by centering the V block 30 and the block 31, the centering portion can be manufactured at low cost. Further, since the centering portion is a flat surface, accurate centering can be performed.

In each of the above embodiments, the resin applied to the substrate is
It was cured with a UV irradiation device using a UV curable resin,
The present invention is not limited to this, and is cured by a heating device using a thermosetting resin. In addition, it is needless to say that the EB curable resin may be cured by alpha rays, gamma rays, X rays, electromagnetic rays, or the like.

〔The invention's effect〕

According to the present invention as described above, in the production of a composite optical element, the value of the radius of curvature of the base material is not affected,
In addition, the diameter of the resin applied to the substrate can be increased to the vicinity of the outer diameter of the substrate, and the composite optical element can be manufactured extremely easily. Further, the thickness variation in the composite optical element after molding can be suppressed.

[Brief description of the drawings]

1 to 3 show a first embodiment of an apparatus for manufacturing a composite optical element according to the present invention. FIG. 1 is a partially longitudinal side view, FIG. 2 is a plan view of a centering portion, and FIG. 4 is a partially enlarged sectional view, FIG. 4 is a plan view of a centering portion showing the second embodiment, and FIG. 5 is a sectional view showing a conventional example. DESCRIPTION OF SYMBOLS 1 ... Device 2 ... Lower base 3,10 ... Column 4 ... Upper base 5,13,24,25 ... Cylinder 6, 14, 26 ... Rod 7 ... Stopper 8 ... Pulse motor 9 ... Sliding base 11 ... Mold base 12 ... Mold 15 ... Holding table 16,21 ... Motor 17,22 ... Belt 18 ... UV irradiator 19 ... Frame 20 ... Chuck 23 ... Claw 27 ... Resin discharge device 28 ... Base material 29 ... Resin 30 ... V block 31 ... Block

Claims (1)

(57) [Claims] In a composite optical element manufacturing apparatus for forming an energy-curable resin layer on a substrate of an optical element, a mold having a desired optical shape is provided so as to be movable up and down, and a cylindrical shape holding the substrate is provided. An apparatus for manufacturing a composite optical element, wherein a holding table is rotatably provided and a centering portion for holding an outer periphery of the base material is provided.