KR930005369Y1 - Lens - Google Patents

Abstract

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Description

Hybrid Optics

1a to d is a conceptual diagram of the present invention.

2a to c are explanatory views showing a first embodiment of the present invention.

Explanatory drawing which shows the state which expands resin.

FIG. 4 is a cross-sectional view of a part of the composite optical component that is molded when the groove part of the mold shown in FIG. 2 is formed in a rectangular shape. FIG.

5a to c are explanatory views showing a second embodiment of the present invention.

FIG. 6 is a cross-sectional view of a portion of the composite optical component formed when the groove portion of the substrate shown in FIG. 5 is formed in a rectangular shape. FIG.

7a to c are explanatory views showing a third embodiment of the present invention.

FIG. 8 is a cross-sectional view in which a part of the composite optical component formed when the block portion of the mold shown in FIG. 7 is formed in a rectangular shape is omitted. FIG.

9a to c are explanatory views showing a fourth embodiment of the present invention.

FIG. 10 is a cross-sectional view in which a part of the compound optical component is omitted in the case where the shape of the block portion of the substrate shown in FIG. 9 is formed and shaped in a U shape. FIG.

* Explanation of symbols for main parts of the drawings

A: Optical part 1: Lens base

2: resin layer 3: mold

20: resin

The present invention relates to a composite optical component comprising a glass or transparent plastic substrate and a curable resin formed on the surface of the substrate.

The lens, which is a conventional optical component, has been mostly formed of glass, and in particular, when processing an aspherical lens, the processing cost is much higher than that of a spherical lens. Thus, there is a method of manufacturing a so-called plastic lens which is molded by injecting a transparent thermoplastic resin into a mold in order to solve this drawback. However, this method does not need to be polished and can be mass-produced at low cost. However, compared with glass materials, shrinkage cavities are more likely to occur during cooling after molding, and thus, the focal length is shifted.

Complementing the above-mentioned drawbacks, the so-called composite photosynthesis part which forms an optical part composed of a resin layer having an optical surface of the glass substrate and the mold by curing the resin between the mold and the glass substrate having the desired optical shape. There is a manufacturing method. According to this method, since the resin layer is a thin film, the change in refractive index due to thermal expansion or heat is also small. In addition, the deformation can also suppress the occurrence of shrinkage cavities.

The manufacturing procedure of the conventional composite optical component is "(a) resin is discharged on the resin layer formation surface of a lens or a plastic base material. (b) The mold having a desired shape is removed from the substrate on which the resin is discharged and pressed to expand the resin to form a thin resin layer. (c) The resin layer is cured. (d) The mold is separated. ”

As a general compound optical component and a manufacturing method, the invention described in Unexamined-Japanese-Patent No. 60-56544 can be mentioned.

In the molding process of the conventional composite optical component described above, when the discharge position of the resin to the base material is shifted from the center of the base, or the roundness of the discharged resin is poor (the phenomenon is not circular). Pressing the resin into the mold and spreading the resin layer spreads out of the substrate center or spreads out in an oval shape. Therefore, the displacement of the resin position after the discharge or the roundness of the discharged resin needs to be reduced to several tens of micrometers or less, and it is difficult to derive such precision in a composite optical component requiring a resin amount of several tens to several hundred cubic mm. In addition, the resin is unevenly spread due to the nonuniformity of the wettability of the substrate surface and the mold surface.

As a method of avoiding the above-mentioned drawbacks, conventionally, a substrate and a mold having a diameter larger than necessary have been dealt with, but it is too large as an optical component to obtain a diameter having an optical surface required with the minimum required diameter. Not only is it high, but the product itself using this composite optical component also becomes large.

As another method, there is also a method of molding the resin out of the mold by using more than necessary resin, but this requires a step of removing the resin out of the manufacturing process.

The present invention, in view of the above problems in the prior art, has a resin layer having a good roundness with a minimum base diameter and a mold diameter required without affecting the positional displacement and the roundness of the discharged resin or the nonuniformity of the surface wetness. It is an object to provide a type optical component.

In the manufacture of the composite optical component according to the present invention, an annular recess having a width of 0.01 to 0.5 mm or more and 0.05 to 0.2 mm or more and a depth of 0.05 to 0.5 mm or more is formed on the outer circumference of the resin layer forming surface of the mold. In order to improve the roundness of the resin layer (the content refers to the shape when it is unfolded) by forming it, and to form the annular recessed groove having the same shape as the mold on the outer periphery of the resin layer forming surface of the substrate, To improve the roundness of the resin layer by forming an annular convex portion having a width of 0.1 to 0.5 mm or more and 0.05 to 0.2 mm or more and a desired resin layer or less on the outer circumference of the resin layer forming surface of the mold; In order to improve the roundness of the resin layer by forming an annular block portion having the same shape as that of the metal mold on the outer circumference of the resin layer forming surface of the substrate, the annular block portion or concave groove portion of the manufactured substrate is La be intended to provide a hybrid optical component formed by combining the outer periphery of the resin layer.

The concave groove portion or the block portion in the above constitution of the present invention utilizes the characteristic of the liquid agent that the resin layer which is elliptical or unevenly spread is expanded along the concave groove portion or the convex portion without being spread out to the outer periphery of the substrate at the position where the resin layer reaches the concave groove portion or the convex portion. Doing.

FIG. 1A shows a conceptual diagram of a composite optical component A formed by using a mold having an annular V-shaped groove formed on the outer circumference of the composite optical component according to the present invention, 1 is a lens substrate, and 2 is a resin layer. to be. On the outer circumference of the resin layer 2, a convex portion 2a in which the V-shaped groove portion of the mold is inverted is formed.

1B shows a conceptual diagram of the composite optical component A formed by using a lens substrate having an annular V-shaped groove formed on the outer periphery of the lens substrate among the composite optical components according to the present invention. It is a resin layer. The outer peripheral portion of the lens substrate 1 is formed with a V-shaped groove portion 11, and the resin is filled in the V-shaped groove portion 11, so that the outer peripheral portion 2b of the resin layer 2 is combined with the lens substrate 1 It shows the state.

Fig. 1C shows a conceptual diagram of the composite optical component A formed by using a mold in which the annular convex portion is formed on the outer circumference of the composite optical component according to the present invention, where 1 is a lens base material and 2 is a resin layer. . On the outer circumference of the resin layer 2, an inclined portion 2c in which the convex portion of the mold is inverted is formed.

1D shows a conceptual diagram of a composite optical component molded using a substrate having an annular block portion formed on the outer periphery of the lens substrate among the composite optical components according to the present invention, where 1 is a lens substrate and 2 is a resin layer. The convex part 12 is formed in the outer peripheral part of the said lens base material 1, and the outer peripheral part 2d of the resin layer 2 is couple | bonded along this convex part 12. As shown in FIG.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

Example 1

(A)-(c) of FIG. 2 is explanatory drawing for manufacturing the composite optical component which concerns on this invention.

In the drawing, 3 is a mold having a desired optical shape, and an annular v-shaped groove 31 is processed in the outer circumference of the resin layer forming surface of the mold 3.

1 is a lens substrate formed of an optical glass material, and 20 is an ultraviolet curable resin. However, the resin 20 discharged to the lens base material 1 has a precision of being discharged by manual operation without controlling the discharge position and the roundness of the discharged resin. The V-groove 31 of the metal mold | die 3 has a shape with a width of 0.1 mm square angle of 60 degrees (refer also FIG. 2A).

FIG. 2B shows a state in which the resin 20 is filled in the annular V-groove 31 while being pressed and unfolded by pressing the mold 3 close to the lens substrate 1. 2 shows the block portion 2a of the resin layer 2 filled in the V-shaped groove 9 of the mold 3.

After hardening the resin layer 2 in the manner described above, the mold 3 is removed, whereby the composite optical component A in which the resin layer 2 of the desired shape is formed on the lens substrate 1 is formed. do. The hardened convex part 2a of resin filled in the said V-groove 31 is formed in the outer peripheral part of this resin layer 2 (refer also to 2c).

(A)-(c) of FIG. 3 is explanatory drawing in case the effect of this invention was seen from the side of the lens base material 1. In this explanatory drawing, in order to easily understand explanatory drawing, the lens base material 1 is shown in FIG. Omitted.

3A shows the resin 20 discharged onto the glass substrate and the annular V-shaped groove 31 processed in the mold 3.

FIG. 3B shows the way of bringing the mold 3 close to the lens substrate, and shows the portion 28 where the resin 20 reaches and fills the V-groove 31.

When the mold 3 is brought closer to each other in the above-described state, the resin 20 expands along the annular V-shaped groove 31 (see part 3c in FIG. 3).

Table 1 below shows the results of comparing and measuring the shape of the resin layer of the composite optical part A molded by the above-described method and the shape of the resin layer of the optical part molded by the conventional method. Here, "A" in Table 1 represents the composite optical component molded by the present invention, and "B" represents the composite optical component molded by the conventional method. In addition, "deviation" shows the state where the center position of a lens base material and the center position of a resin layer are shift | deviated, and "roundness" shows the roundness of a resin layer.

TABLE 1

○: Available as an optical part

X: impossible as an optical part

In the comparison in Table 1 described above, all of the resins were UV curable urethane acrylate-based resins, except that in the embodiment of the present invention, an annular V-shaped groove was used for the outer peripheral part of the mold and a mold without a groove was used in the conventional product. The mold releasing treatment and the coupling treatment to the glass substrate were carried out in the same manner.

The mold release process was performed by baking a 10% by weight diluent of toluene into the mold using a silicone baking mold release agent KS-701 (manufactured by Shinwol Chemical Co., Ltd.) at 200 ° C for 1 hour, and the coupling treatment was methacrylate. The silicic coupling agent KBM-503 (manufactured by Shinwol Chemical Co., Ltd.) was subjected to an aging treatment at 80 ° C. for 20 minutes with a dilution of 1% by weight of ethanol.

As a result, in the conventional processed product, the resin layer is unevenly unfolded to partially protrude from the mold, or the resin layer is not expanded beyond the optically necessary diameter, and the center of the lens substrate and the center of the resin layer are not expanded. The position was greatly displaced and the roundness was also poor, which was not enough to be used as an optical component. On the other hand, in the present invention, the resin is unfolded in the same shape as the annular V-groove processed in the mold to form a resin layer having an outer diameter smaller than that of the lens base, and the outer periphery protrudes in a shape corresponding to the shape of the concave groove or the convex portion. By the minute, the shift of the center position with respect to the resin layer and the roundness defect could not be recognized.

In addition, in the above embodiment, the shape of the groove is V-shaped, but may be a U-shaped groove or a rectangular groove (see Fig. 4), or may be molded on the convex surface side of the lens substrate.

In FIG. 4, 1 is a lens base material, 2 is a resin layer, and 2e shows the convex part formed by the rectangular groove part of a metal mold | die.

Example 2

5A to 5C are explanatory views showing a second embodiment of the composite optical component according to the present invention. Hereinafter, the manufacturing method of the second embodiment will be described in detail with reference to the drawings.

3 is a metal mold | die with a desired optical shape. Reference numeral 1 denotes a plastic lens base material formed by injecting a thermoplastic resin into a mold, and an annular V-shaped groove 11 is machined on the outer circumference of the resin layer forming surface of the plastic lens base material 1.

The annular V-shaped groove 11 may be directly machined to a plastic lens or a method of forming a V-shaped groove by forming a V-shaped annular convex portion in a mold during molding process. Was carried out. The V-shaped groove 11 of the plastic lens base material 1 has a shape having a width of 0.1 mm and a right angle of 60 degrees. Since the following procedure is the same as in Example 1, the description of FIG. 5b, which has not been described, shows that the resin layer 2 is made of a plastic lens substrate (3) by pressing the resin 20 close to the plastic lens substrate 1 and pressing it out. A resin layer having a desired shape is formed in the plastic lens substrate 1 by performing a mold release process to remove the mold 3 by filling the magnetic groove 11 of 1) and forming the outer peripheral portion 2b. The state which the composite optical component A in which (2) was formed was shape | molded is shown.

In the composite optical part A molded according to the above embodiment, the resin was unfolded in the same shape as the V-shaped groove formed in the plastic lens as in the first embodiment, so that the shift of the center position or the occurrence of roundness failure could not be recognized. .

In this embodiment, an ultraviolet curable urethane acrylate resin was used, and the mold releasing treatment was performed in the same manner as in the first embodiment. The plastic lens base was a plastic lens molded from polycarbonate, and the surface of the polycarbonate lens was surface-treated by irradiating the surface of the polycarbonate lens for 60 seconds with ultraviolet light having a short wavelength to improve the adhesion with the resin.

In addition, in the above embodiment, the shape of the groove is V-shaped, but may be a U-shaped groove or a rectangular groove (see FIG. 6), or may be molded on the convex surface side of the lens substrate.

In FIG. 6, 1 is a lens base material, 2 is a resin layer, and 2f shows the outer peripheral part formed by the rectangular groove part of the lens base material 1. As shown in FIG.

Example 3

7A to 7C are explanatory views showing a third embodiment of the composite optical component according to the present invention. EMBODIMENT OF THE INVENTION Hereinafter, the manufacturing method of 3rd Example is demonstrated in detail based on drawing.

3 is a metal mold | die of a desired optical shape, and the annular convex part 32 is processed in the outer peripheral part of the resin layer formation surface of this metal mold | die 3. As shown in FIG.

The convex part 32 of the metal mold | die 3 is made into the shape whose height is 0.2 degree square angle 60 degrees (refer also FIG. 7a).

7B shows the resin layer 2 along the annular block portion 32 in which the resin 20 is formed in the mold 3 by pressing and unfolding the mold 3 close to the lens substrate 1. This shows a state in which the inclined portion 2c is formed. Since the curing of the resin layer 2 and the mold releasing process of the mold are the same as those in the first embodiment, the description thereof is omitted, but FIG. 7C shows the composite optical component A obtained by the embodiment of the present invention.

The resin, the mold release process, the coupling process, and the result in this embodiment are the same as in the first embodiment.

In addition, in the said Example, although the shape of the convex part was made into V shape, it may be made into a U shape or rectangular shape (refer FIG. 8), and also may shape | mold to the convex surface side of a base material. In FIG. 8, 1 is a lens base material, 2 is a resin layer, and 2g represents the outer peripheral part formed by the convex part of the rectangular shape of (3) of a metal mold | die.

Example 4

9a to c are explanatory views showing a fourth embodiment of the composite optical component according to the present invention. EMBODIMENT OF THE INVENTION Hereinafter, the manufacturing method of 4th Example is demonstrated in detail based on drawing.

3 is a metal mold | die of a desired optical shape. Reference numeral 1 denotes a plastic lens substrate formed by molding a thermoplastic resin into a mold, and an annular convex portion 12 is formed on the outer circumference of the resin layer forming surface of the plastic lens substrate 1. The convex part 12 is obtained by forming and forming a convex groove part in a metal mold | die when forming a plastic lens.

The convex part 12 of this embodiment is a shape whose height is 0.2 mm and a right angle is 60 degrees.

9B shows the resin layer along the annular convex portion 12 formed in the plastic lens substrate 1 by pressing and unfolding the mold 3 close to the plastic lens substrate 1 to press and expand the resin 20. The state in which the outer peripheral part 2d of (2) is formed is shown. Since the curing of the resin layer 2 and the mold releasing process of the mold are the same as in the second embodiment, the description thereof is omitted, but FIG. 9C shows the composite optical component A obtained by the embodiment of the present invention.

In this embodiment, the resin, the mold releasing treatment, the material and the surface treatment method of the substrate, and the quality of the obtained composite optical component are the same as in the second embodiment.

In addition, in the said Example, although the shape of the convex part was V-shaped, you may make it U-shaped and you may shape | mold to the convex surface side of a base material.

The composite optical part A shown in FIG. 10 shows a case where the resin layer 2 is formed by joining the outer circumferential portion 2h along the cross-section U-shaped convex portion 12 'formed on the substrate 1.

According to the composite optical part of the present invention as described above, the resin layer is filled and molded into the annular recessed groove formed on the resin layer forming surface of the mold or the annular recessed groove formed on the resin layer forming surface of the substrate; Since the resin layer is formed by reaching the annular convex portion formed on the resin layer forming surface of the mold or the annular convex portion formed on the resin layer forming surface of the substrate, the resin layer expands along the concave groove portion or the convex portion. It is possible to obtain a composite optical component having not only good roundness but also a position where the resin layer does not deviate from the substrate.

Claims (1)

In the composite optical component A consisting of the lens base material 1 and the resin layer 2 formed of optical glass or optical receiving material, an annular convex portion 12 or concave on the outer circumference of the lens base material 1. The groove layer 11 is formed, and the outer circumferential portions 2b, 2d, 2f, and 2h of the resin layer 2 are coupled to the annular convex portion 12 or the concave groove portion 11 to form the resin layer 2. ) Is a composite optical component, characterized in that formed.