JP3184658B2 - Composite optical element and method of manufacturing the same - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a composite optical element and a method for manufacturing the same.

[0002]

2. Description of the Related Art In general, a composite optical element is known in which an energy-curable resin layer is formed on at least one surface (an optically functioning surface, a so-called optical surface) on a substrate of an optical element. ing. The composite optical element has an energy-curable resin placed on at least one surface of a substrate of the optical element and forms a desired resin layer by pressing an optical element molding die on the resin. It is obtained by curing the resin layer by irradiation of energy and then peeling the cured resin layer from the mold.

Conventionally, in the production of such a composite optical element, various methods have been known as methods for easily realizing separation of a resin layer from a mold. For example, JP-A-3-18
Japanese Patent No. 4813 proposes a method in which a releasing member is brought into contact with an outer peripheral portion of a surface (molding surface) of a base material on which a resin layer is formed, thereby separating a mold and a resin layer.

[0004]

However, according to the method described in the above publication, when the diameter of the base material is substantially equal to the diameter of the resin layer, or when the resin layer protrudes to the outer periphery of the base material,
It was not possible to secure an area where the peeling member was in contact with the surface of the base material on which the resin layer was formed. Further, when the mold and the resin layer were peeled off by bringing a peeling member into contact with the resin layer, the resin layer was damaged. For this reason, conventionally, in order to separate the mold and the resin layer with the separating member, the diameter of the base material has to be increased.

The present invention has been made in view of the above-mentioned conventional problems, and a composite which can easily realize the separation of a mold and a resin layer by using a member for separation without increasing the diameter of the base material. It is an object to provide a mold optical element and a method for manufacturing the same.

[0006]

In order to solve the above-mentioned problems, the present invention provides an optical element having an energy-curable resin mounted on at least one surface of a substrate of the optical element, and the resin for molding an optical element. Forming a desired resin layer by pressing a mold, curing the resin layer by irradiation of energy, and then peeling the cured resin layer from the mold; The entire periphery or a part of the side surface is provided with a contact portion that does not protrude from the side surface of the base material and is capable of contacting the peeling member. The layers were separated.

The present invention also relates to a composite optical element in which an energy-curable resin layer is formed on at least one surface of a substrate of an optical element. Has a contact portion that does not protrude from the side surface and that can be contacted by a peeling member, thereby enabling the above-described manufacturing method.

[0008]

According to the present invention having the above-described structure, a contact portion provided on the entire periphery or a part of the side surface of the base material and not protruding from the side surface of the base material and having a shape capable of contacting a peeling member is provided. By contacting the peeling member, the mold and the resin layer can be easily peeled off without increasing the diameter of the base material, and a desired composite optical element can be obtained.

[0009]

Embodiment 1 (Structure) FIG. 1 is a view showing one step of the manufacturing process of this embodiment. The mold 1 is held movably up and down. Below the mold 1, a glass base material 2 whose central axis is the same as the central axis of the mold 1 and whose both surfaces are concave is provided. Substrate 2
In the middle of the side surface, a V-shape having a width of 2 mm, which is axially symmetrical with respect to the central axis of the base material 2 and having a width of 60 degrees, so as not to affect the transmission of light rays necessary for image formation at the time of photographing. A contact portion 2a formed of a groove is provided. Further, a urethane acrylate-based ultraviolet-curable resin layer (hereinafter, referred to as a resin layer) 3 is interposed between the mold 1 and the base material 2.
The substrate 2 and the resin layer 3 are in close contact. At one location on the outer peripheral portion of the base member 2, a peeling member 4 that can contact the contact portion 2 a of the V-shaped groove by approaching the central axis of the base member 2.
Is provided.

(Operation) First, a required amount of resin 5 is discharged onto the upper surface of the substrate 2 (see FIG. 2). Next, the mold 1 is lowered, and the resin 5 is spread by approaching the base material 2, and the lowering of the mold 1 is stopped at a position where the resin 5 forms the resin layer 3 having a desired thickness. In this state,
The resin layer 3 is cured by irradiating ultraviolet rays from below the substrate 2 by means (not shown). As a result, an adhesive body in which the mold 1, the base material 2, and the resin layer 3 are integrated is formed (see FIG. 3). Next, the member for peeling is brought into contact with the contact portion 2a of the V-shaped groove of the substrate 2 by bringing the member for peeling 4 close to the center axis of the adhered body of the mold 1, the substrate 2, and the resin layer 3. 4 (see FIG. 4). Then, when the mold 1 is raised with respect to the above-mentioned close contact body, the base material 2 is easily and instantaneously moved from the mold 1.
The composite optical element 6 in which the and the resin layer 3 are integrated is peeled off (see FIG. 5).

(Effects) According to the present embodiment, a composite optical element can be manufactured continuously and easily using the peeling member 4 without increasing the diameter of the substrate 2.

In this embodiment, the contact portion 2a having a V-shaped groove having a width of 2 mm and 60 degrees is provided in a symmetrical shape with respect to the central axis. However, the present invention is not limited to this embodiment. The groove having an arbitrary shape such as a U-shape or a concave shape can be provided in an arbitrary range and an arbitrary number with respect to the central axis within a range that does not affect the transmission of light. Obtainable.

Further, in the present embodiment, the peeling member 4 for peeling the mold 1 and the resin layer 3 is provided at only one place, but the present invention is not limited to this embodiment. A contact portion 2a in which a member 4 for peeling is provided on a side surface of the substrate 2
May be provided at two places, three places, or the entire outer peripheral part of
The same effects as in the present embodiment can be obtained.

On the other hand, the contact portion 2a provided on the base material 2 in this embodiment can be used as a positioning means when the composite optical element manufactured by the above means is incorporated in a lens frame or the like. When incorporated in a mirror frame or the like, a convex portion having a shape corresponding to the groove shape is formed in the lens frame or the like, and the composite optical element is fixed to the lens frame or the like by fitting the convex portion and the groove portion. It can also be used as a means.

[0015]

Embodiment 2 (Structure) As shown in FIG. 6, this embodiment is different from Embodiment 1 in that first, both surfaces of the base material 2 are convex. Also, as shown in FIG. 7, a contact portion 2a formed of a U-shaped groove having a width of 2 mm within a range of 30 degrees with respect to the central axis is provided in the middle of the side surface of the base material 2, and the deepest portion of the groove is located at the central axis. It is provided so as to form a string. Other configurations are
This is the same as in the first embodiment.

(Operation) The same as in the first embodiment.

(Effect) In the present embodiment, the same effect as in the first embodiment is obtained, and since the linear groove is provided in the substrate 2, the groove is easily formed in the substrate 2 with a diamond tool or the like. It can be performed.

In this embodiment, the center axis is 30
The contact portion 2a formed of a U-shaped groove having a width of 2 mm in the range of degrees is provided such that the deepest portion of the groove forms a chord with respect to the central axis, but the present invention is not limited to such an embodiment. ,
Any number of grooves having an arbitrary shape such as a V-shaped or concave shape may be provided so that the deepest portion forms a chord within a range that does not affect light transmission in an arbitrary range with respect to the central axis. The same effect as that of the embodiment can be obtained.

[0019]

Embodiment 3 (Structure) This embodiment is different from Embodiment 1 in that
However, both sides are made of plastic having a convex surface. Then, as shown in FIGS. 8 and 9, in the middle of the side surface of the base material 2, a diameter of 1 mm and a depth of 2
There are provided four contact portions 2a each having a hole of mm. Further, peeling members 4 are provided at four locations on the outer peripheral portion of the base member 2 so as to be able to contact the four contact portions 2a, respectively. Other configurations are the same as in the first embodiment.

(Operation) The same as in the first embodiment.

(Effects) In this embodiment, the same effects as those of the first embodiment are obtained, and a uniform force is applied to the substrate 2 from four directions when the mold 1 and the resin layer 3 are separated. The position of the composite optical element is constant, and handling becomes easy.

In this embodiment, the diameter is 1 mm and the depth is 2 mm.
Although four contact portions 2a each having a hole of 90 mm are provided at every 90 degrees with respect to the central axis, the present invention is not limited to such an embodiment, and as long as it does not affect light transmission, Holes having an arbitrary shape such as a square or a triangle and having an arbitrary depth can be provided at an arbitrary position and an arbitrary number with respect to the center axis, and the same effect as that of the present embodiment can be obtained.

In each of the above embodiments, an ultraviolet curable resin is used. However, similar effects can be obtained by using another energy curable resin such as a thermosetting resin or an electron beam curable resin. it can.

[0024]

As described above, according to the composite optical element and the method of manufacturing the same according to the present invention, the composite optical element can be continuously and easily formed using the peeling member without increasing the diameter of the substrate. An optical element can be manufactured.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view showing a manufacturing process according to a first embodiment of the present invention.

FIG. 2 is a longitudinal sectional view showing a manufacturing process of the first embodiment of the present invention.

FIG. 3 is a longitudinal sectional view showing a manufacturing process of the first embodiment of the present invention.

FIG. 4 is a longitudinal sectional view showing a manufacturing process of the first embodiment of the present invention.

FIG. 5 is a longitudinal sectional view showing the manufacturing process of the first embodiment of the present invention.

FIG. 6 is a longitudinal sectional view showing a manufacturing process of the second embodiment of the present invention.

FIG. 7 is a plan view showing a base material of the example.

FIG. 8 is a longitudinal sectional view illustrating a manufacturing process according to a third embodiment of the present invention.

FIG. 9 is a plan view showing a base material of the example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Mold 2 Base material 2a Contact part 3 Resin layer 4 Peeling member 5 Resin

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Claims (2)

(57) [Claims] 1. An energy-curable resin is placed on at least one surface of a substrate of an optical element, and a mold for molding an optical element is pressed on the resin to form a desired resin layer. After the resin layer is cured by irradiation, in the method of manufacturing a composite optical element in which the cured resin layer is peeled from the mold, the entire periphery or a part of the side surface of the base is protruded from the side surface of the base. Manufacturing a composite optical element, comprising: providing a contact portion having a shape capable of contacting with a peeling member, and peeling the mold and the resin layer by contacting the peeling member with the contact portion. Method. 2. A composite optical element in which an energy-curable resin layer is formed on at least one surface of a substrate of an optical element, the entire circumference or a part of the side surface of the substrate protruding from the side surface of the substrate. A composite optical element, characterized in that it has a contact portion having a shape capable of contacting a peeling member without being provided.