JPH03184813A - Manufacturing device for composite optical element - Google Patents

Abstract

PURPOSE:To clamp the outer diameter of a base, carry out centering and eliminate unevenness of resin wall thickness by providing a mold of desired optical shape vertically freely movably, providing a cylindrical support bed for supporting the base rotatably and a centering section for retaining the outer periphery of the base. CONSTITUTION:A base 28 composed of glass or plastic with its outer periphery processed to the desired accuracy is supplied on a base receiving surface 15a of a support bed 15 of a device 1. Cylinders 24 and 25 are installed at the center of a mold surface 28a of said base 28 and worked, and the proper quantity of resin 29 is applied from a resin feeding device 27. Then a chuck 20 driven by a motor 21 clamps the outer periphery of the base 28 and carries out centering. After that, a cylinder 5 is operated to lower a mold 12 which is stopped in a position just before being brought in contact with resin 29. While the support bed 15 is rotated by a motor 16, a stopper 7 is rotated by a pulse motor 8 and the mold 12 is lowered at low speed to be brought into contact with the resin 29, and the resin 29 is spread over a mold surface 28a. Then, UV beam is irradiated from below the base 28 by a UV irradiator 18 to cure the resin 29 spread into the shape of the mold 12.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an apparatus for manufacturing a composite optical element that forms an aspherical shape by coating the surface of glass or plastic with a resin.

[Conventional technology]

In recent years, aspherical lenses in which the surface of a glass or plastic base material is coated with resin are being used in some cases. The following invention has been disclosed as an apparatus for manufacturing this aspherical lens.

For example, in the invention described in Japanese Patent Application Laid-Open No. 62-227711, as shown in FIG.
Belyatoy 1 with a bell clamp structure that determines the center of the
01 and 106 are disposed facing each other, and a mold 105 having an aspherical molding surface is fitted into the Berya toy 106 and centered by the fitting. Also, Berya Toy 10
1 includes a UV light source 102 that emits UV light.

The conventional device having the above configuration is capable of measuring the amount of resin 104
is placed on the molding surface of the mold 105, and the spherical glass lens 1 is placed on the molding surface of the mold 105.
Put 03 on it. Next, the spherical glass lens 103 is clamped and centered using Hellyatoys 101 and 106, and the resin 104 is spread to match the molding surface of the mold 105. An apparatus has been proposed in which UV light is emitted from the UV light source 102 to cure the resin.

[Problems to be Solved by the Invention] However, in the apparatus of the prior art, the spherical glass lens 103 (hereinafter referred to as the base material) is centered using a bell clamp structure, and therefore the base material has a large curvature compared to the outer diameter. This method was not applicable to materials, and there were restrictions on the shape of the base material. Furthermore, since the resin is clamped on the R surface of the base material, the resin diameter cannot be made larger than the Beryatoi diameter, which limits the resin diameter. Furthermore, since the mold is fixed, variations in resin wall thickness in the base material directly affect the finished product.

Therefore, the present invention was developed in view of the above-mentioned shortcomings in the prior art, and provides an apparatus for manufacturing a composite optical element, which performs centering by clamping the outer diameter of the base material, and solves the variation in resin wall thickness. For the purpose of providing.

[Means to solve the problem]

The present invention provides an apparatus for manufacturing a composite optical element that forms an energy-curable resin layer on a base material of an optical element, in which a mold having a desired optical shape is provided to be movable up and down, and a cylindrical shape for holding the base material is provided. The base is rotatably provided, and a centering portion for holding the outer periphery of the base material is provided.

[Function] The apparatus for manufacturing a composite optical element according to the present invention can perform centering without being influenced by the radius of curvature of the base material, and can keep the resin thickness constant.

[Example] Hereinafter, an example of an apparatus for manufacturing a composite optical element 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 a manufacturing apparatus for a composite optical element according to the present invention. FIG. 1 is a partially longitudinal side view, and FIG. 2 is a centering section. The plan view and FIG. 3 are partially enlarged sectional views.

Reference numeral 1 designates a device, in which a support 3 is erected on a lower heath 2, and an upper heath 4 is placed on the upper end of the support 3. A cylinder 5 is fixed to the center of the upper surface of the upper heath 4. A rod 6 is fitted into the fifth cylinder so as to be movable up and down, and a stopper 7 and a pulse motor 8 for controlling the position of the stopper 7 are provided at the upper end of the rod 6.

Further, a sliding base 9 is attached to the lower end of the roller. A portion of the sliding base 9 is slidably fitted to the support column 3, and is configured to be movable up and down using the support column 3 as a guide.

A column 10 is erected on the lower surface of the sliding base 9.
A mold base 11 is attached to the lower end of the mold base 1.
A mold 12 is fixed to the lower surface of the mold 1. Further, a cylinder 13 is fixedly installed at the center of the lower surface of the sliding base 9, and a mold head 11 and a mold 12 are configured to be movable up and down by a rod 14 from the cylinder 13 using a support 10 as a guide.

A cylindrical holding table 15 is loosely fitted into the lower base 2 coaxially with the mold 12, and a motor 16 attached to the lower surface of the lower base 2 is attached to the lower base 2.
It is rotatably provided via a belt 17.

Further, 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 extending vertically from the lower surface of the lower space 2.

Reference numeral 20 denotes a three-point chuck chuck that is fixed to the lower mousse 2 for centering. It is configured to be opened and closed by a motor 21 attached to the belt 22 via a belt 22.

At the top of the chuck 20, an abbreviated claw 23 is attached to the mold 1.
It is fixed so that it does not come into contact with 2.

A cylinder 24 that is movable back and forth is provided on the upper surface of the lower base 2, and a cylinder 25 is attached to the upper part of the cylinder 24. A resin discharging device 27 is attached to a vertically movable rod 26 fitted into the cylinder 25.

The profit receiving surface 15 of the holding stand 15 of the device 1 having the above configuration
A base material 28 made of glass or plastic whose outer periphery has been processed to a desired precision is supplied to a. The cylinders 24 and 25 are operated to apply an appropriate amount of resin 29 to the center of the molded surface 28a of the base material 28 from the resin discharging device 27. Next, the chuck 20 driven by the motor 21 clamps the outer periphery of the base material 28 and performs centering.

After that, the cylinder 5 is operated to lower the mold 12 and the resin 2
Stop at the position just before contacting 9.

Then, in order to spread the resin 29 evenly over the molding surface 28a, the motor 16 rotates the holding table 15, and the pulse motor 8 rotates the stopper 7, lowering the mold I2 at a low speed and bringing it into contact with the resin 29. is spread on the molding surface 28a. Next, the resin 29 spread into the shape of the mold 12 is cured by irradiating UV light from the lower side of the base material 28 using the UV irradiator 18 .

At this time, the resin 29 hardens and shrinks slightly. In order to make the mold 12 follow this contraction, the resin 2 is
Pulse motor 8 maintains the pressure applied to 9 at a constant value.
is rotated to lower the mold 12.

When releasing the mold 12, the mold 12 is raised by the cylinder 5, and the base material 28 is brought into contact with a mold release pawl 23 provided so as to have a slight gap between the base material 28 and the base material 28. As a result, cantilever stress is applied to the mold 12 and the resin 29, causing the base material 28 to be released from the mold.

According to this embodiment, by clamping the outer periphery of the base material 28, workability during molding of the composite optical element can be improved. Furthermore, by performing centering using the chuck 20, changes in the diameter of the base material 28 can be accommodated.

(Second Embodiment) FIG. 4 is a plan view of a centering section showing a second embodiment of the composite optical element manufacturing apparatus according to the present invention.

In this embodiment, instead of the centering chuck 20 in the first embodiment, a fixed V block 30 and a block 31 movable in the front and back direction toward the groove 30a of the block 30 are used. The configuration is different, and the other configurations are the same, so a description of the configuration will be omitted.

In this embodiment, centering is performed by supplying the base material 28 to the V groove 30a of a fixed V block 30 and pressing the block 31 against the base material 28. Hereinafter, the operation is similar to that of the first embodiment, and the explanation of the operation will be omitted.

According to this embodiment, by performing centering using block 30 and block 31, the centering portion can be manufactured at low cost. Furthermore, since the centering portion is flat, accurate centering can be performed.

In each of the above examples, the resin applied to the base material was U.
Although the V-curable resin was used and cured using a UV irradiation device, the present invention is not limited thereto, and a thermosetting resin was used and cured using a heating device. It goes without saying that an EB curable resin may be used and cured by alpha rays, gamma rays, X-rays, electromagnetic rays, or the like.

〔Effect of the invention〕

As explained above, according to the present invention, when manufacturing a composite optical element, it is not affected by the value of the radius of curvature of the base material, and the diameter of the resin applied to the base material can be expanded to near the outer diameter of the base material. In addition, the composite optical element can be manufactured extremely easily.

Furthermore, variations in thickness of the composite optical element after molding can be suppressed.

[Brief explanation of drawings]

1 to 3 show a first embodiment of a manufacturing apparatus for a composite optical element according to the present invention, in which FIG. 1 is a partially longitudinal side view, FIG. 2 is a plan view of the centering part, and 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. 1... Device 2... Lower base 3.10... Support column 4... Upper heirth 5.13, 24.25... Cylinder 6 14 26
...Rod 7...Stopper 8...Pulse motor 9...Sliding head 11...Mold hese 12...Mold 15...Holding base 16.21...Motor 1722... - Heald 18...UV irradiator l9...Frame body 20...Chuck 23...Claw 27...Resin discharge device 28...Base material 29...Resin 30...■Block 31 ···block

Claims (1)

[Claims] (1) In an apparatus for manufacturing a composite optical element that forms an energy-curable resin layer on a base material of an optical element, a mold having a desired optical shape is provided so as to be movable up and down, and a cylindrical holding table holds the base material. What is claimed is: 1. An apparatus for manufacturing a composite optical element, characterized in that the base material is rotatably provided, and a centering portion for holding the outer periphery of the base material is provided.