JPH0857976A - Production of composite optical element - Google Patents

Abstract

PURPOSE: To prevent the deterioration of appearance caused by the mixing with an air bubble in the projection part outside the effective diameter of a resin layer by preventing the protrusion of a resin even when special processing is not applied to a base material and irregularity is generated in a resin supply amt. CONSTITUTION: The outermost peripheral part of the optical surface 1c of an inner mold 1a and the innermost peripheral part of the optical surface 1d of an outer mold 1b are pressed in a flush state. Before the thickness of a resin layer becomes a desired value, both parts are further pressed while the outer mold 1b and a base material 2 are separated.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing a composite optical element in which a resin layer is formed on an optical element base material.

[0002]

2. Description of the Related Art Conventionally, as a method for manufacturing a composite optical element, for example, there is an invention described in JP-A-5-337959. In the above invention, as shown in FIG. 1, a groove having an axially symmetric shape with respect to the central axis is provided outside the effective diameter of the optical surface (surface that presses the resin layer) of the mold 1, or FIG. As shown in FIG. 2, by providing a groove having an axisymmetric shape with respect to the central axis to the outside of the effective diameter of the molding surface (surface on which the resin layer is placed) of the base material 2, the optical surface of the mold 1 When the space formed by the molding surface of the base material 2 is widened and variations in the resin supply amount occur, variations in the resin supply amount are absorbed in the recessed grooves and the outermost peripheral portion of the resin 3 protrudes from the molding space. It's a way not to.

[0003]

However, in the method of the prior art described above, in the step of pressing the resin 3 placed on the molding surface of the base material 2 to form a desired resin layer, as shown in FIG. When a concave groove is provided outside the effective diameter of the optical surface of the mold 1, when the resin 3 is filled in the concave groove, the deepest of the groove,
Moreover, the air in the portion close to the central axis does not escape, and as shown in FIG. 3, the resin 3 is not completely filled in the concave groove. Therefore,
There is a problem that the air remains as the bubbles 4 in the protrusion (the shape obtained by inverting the concave groove) outside the effective diameter of the resin layer of the composite optical element that has been manufactured. Here, the bubbles 4 mixed in the resin layer are outside the effective diameter and are not directly related to the optical performance, but if they can be visually confirmed, they cannot be used as a product, leading to a reduction in product yield.

On the other hand, as shown in FIG. 2, when a concave groove is provided outside the effective diameter of the molding surface of the base material 2, there is no problem that the appearance of the resin layer such as air bubbles 4 is deteriorated. However, since the processing cost of the base material increases, there is a problem that the manufacturing cost of the composite optical element also increases as a result. There is also a method of preventing resin from squeezing out of the base material by increasing the diameter of the base material without providing a concave groove in the mold or the base material. If you lose the benefits of the product.

The object of claim 1 is that when a base material slightly larger than the effective diameter of the resin layer is used, the resin supply amount varies even if no special processing such as providing a groove is formed in the base material. However, the resin does not protrude from the space formed by the optical surface of the mold and the molding surface of the base material, and the appearance does not deteriorate due to the inclusion of bubbles in the protrusions outside the effective diameter of the resin layer. It is to provide a method of manufacturing a mold optical element.

According to the second aspect of the present invention, when a base material having a diameter slightly larger than the effective diameter of the resin layer is used, the resin supply amount varies even if special processing such as providing a groove on the base material is not performed. However, the resin does not protrude from the space formed by the optical surface of the mold and the molding surface of the base material, and even when the resin has a high viscosity, air bubbles are mixed in at the protrusions outside the effective diameter of the resin layer. It is an object of the present invention to provide a method for manufacturing a composite optical element that does not deteriorate its appearance due to

[0007]

DISCLOSURE OF THE INVENTION The present invention provides a mold in which an inner mold having an effective surface for forming a desired resin layer surface and an outer mold fitted to the inner mold are formed so as to be vertically movable, and energy. In the manufacturing method for obtaining a composite type optical element, the curable resin is brought into close proximity to the substrate, the resin layer is formed by pressing and spreading the resin, and then the resin layer is cured by irradiation of energy. When the outermost peripheral portion of the resin in contact with the mold moves from the optical surface of the inner mold to the optical surface of the outer mold, the outermost peripheral portion of the optical surface of the inner mold and the innermost peripheral portion of the optical surface of the outer mold. Of the composite optical element characterized in that the outer mold and the base material are relatively separated before the thickness of the resin on the central axis reaches a desired value while pressing the resin in a state where there is no step. It is a manufacturing method. When the viscosity of the energy curable resin is 3000 cps or more, the outer mold and the base material are relatively separated from each other at a relative separation speed of 1 mm / sec or less. is there.

[0008]

The action of claim 1 is, as shown in FIG. 4, the optical surface of the die 1 and the substrate 2 which are divided into an inner die 1a and an outer die 1b which are vertically movable outside the effective diameter. When the resin 3 is pressed and spreads outward from the center by making the molding surface of the resin relatively close to each other, the outermost peripheral portion of the resin 3 extends along the optical surface 1c of the inner mold 1a and the molding surface of the base material 2. When the distance between the optical surface 1c of the inner mold 1a and the molding surface of the base material 2 is gradually reduced toward the outside, the outermost peripheral portion of the resin 3 eventually reaches the optical surface 1d of the outer mold 1b.

At this time, the optical surface 1d of the outer die 1b is more than the outermost peripheral portion (the portion farthest from the central axis) of the optical surface 1c of the inner die 1a.
If the innermost peripheral portion (the portion closest to the central axis) of the is far from the base material 2 (the fitting portion has a step), the optical surface 1d of the outer mold 1b.
The air in the vicinity of the innermost peripheral portion, the side surface of the inner mold 1a, and the portion surrounded by the resin 3 cannot escape. This is similar to the case where a groove is provided outside the effective diameter of the optical surface of the mold 1 as shown in FIG. 3, and even if the resin layer is cured as it is to manufacture the composite optical element, The air causes bubbles 4 in the resin layer.
Will remain as.

However, when the outermost peripheral portion of the resin 3 moves from the optical surface 1c of the inner mold 1a to the optical surface 1d of the outer mold 1b,
As shown in FIG. 5, when the outermost peripheral portion of the optical surface 1c of the inner mold 1a and the innermost peripheral portion of the optical surface 1d of the outer mold 1b are set in a tritch (no step), the innermost portion of the outer mold 1b is formed. Resin 3 around the periphery
The bubbles 4 do not mix in the inside. However, even after the outermost peripheral portion of the resin 3 reaches the optical surface 1d of the outer mold 1b, the inner mold 1
When the die 1 is continuously lowered until the thickness on the central axis of the resin layer reaches a desired value while the outermost peripheral portion of a and the innermost peripheral portion of the outer die 1b are in a tlitche state, the resin supply amount Is larger than a preset value, the resin 3 will overflow from the space formed by the optical surface of the mold 1 and the molding surface of the base material 2.

Therefore, after the outermost peripheral portion of the resin 3 reaches the optical surface 1d of the outer mold 1b and before the thickness of the resin layer on the central axis reaches a desired value, as shown in FIG. By relatively separating the mold 1b and the base material 2, the space formed by the molding surface of the base material 2 and the optical surface of the mold 1 is widened. At this time, since the resin 3 is always in contact with the vicinity of the innermost peripheral portion of the optical surface 1d of the outer mold 1b, the bubbles 4 are not mixed in the resin layer. Then, after the separation of the outer mold 1b and the base material 2 is started,
Alternatively, at the same time when the outer mold 1b and the base material 2 start to separate from each other, the inner mold 1a and the base material 2 are brought close to each other until a desired resin layer is obtained. Therefore, even if the resin supply amount increases, the outermost peripheral portion of the desired resin layer does not protrude from the space formed by the optical surface of the mold 1 and the molding surface of the base material 2.

As shown in FIG. 4, the function of the second aspect is that the optical surface of the mold 1 and the substrate 2 divided into an inner mold 1a and an outer mold 1b that can move up and down relative to each other outside the effective diameter. When the resin 3 is pressed and spreads outward from the center by making the molding surface of the inner surface 1a relatively close to the molding surface, the outermost peripheral portion of the resin 3 is the optical surface 1 of the inner mold 1a.
c and the molding surface of the base material 2 are spread outward, and when the distance between the optical surface 1c of the inner mold 1a and the molding surface of the base material 2 is gradually reduced, the outermost peripheral portion of the resin 3 is eventually separated from the outer mold. The optical surface 1d of 1b is reached.

At this time, if the innermost peripheral portion of the optical surface 1d of the outer mold 1b is farther from the base material 2 than the outermost peripheral portion of the optical surface 1c of the inner mold 1a, the innermost periphery of the optical surface 1d of the outer mold 1b. Area and inner mold 1
The air in the portion surrounded by the side surface of a and the resin 3 cannot escape. This is similar to the case where a concave groove is provided outside the effective diameter of the optical surface of the mold 1 as shown in FIG.
Even if the resin layer is cured as it is to manufacture a composite optical element, the air remains as bubbles 4 in the resin layer.

However, when the outermost peripheral portion of the resin 3 moves from the optical surface 1c of the inner mold 1a to the optical surface 1d of the outer mold 1b,
As shown in FIG. 5, when the outermost peripheral portion of the optical surface 1c of the inner mold 1a and the innermost peripheral portion of the optical surface 1d of the outer mold 1b are set in a tritch (no step), the innermost portion of the outer mold 1b is formed. Resin 3 around the periphery
The bubbles 4 do not mix in the inside. However, even after the outermost peripheral portion of the resin 3 reaches the optical surface 1d of the outer mold 1b, the inner mold 1
If the die 1 is continuously lowered until the thickness on the central axis of the resin layer reaches a desired value while the outermost peripheral portion of a and the innermost peripheral portion of the outer die 1b are in a tritch state, the resin supply amount Is larger than a preset value, the resin 3 will overflow from the space formed by the optical surface of the mold 1 and the molding surface of the base material 2.

Therefore, after the outermost peripheral portion of the resin 3 reaches the optical surface 1d of the outer mold 1b and before the thickness of the resin layer on the central axis reaches a desired value, as shown in FIG. By relatively separating the mold 1b and the base material 2, the space formed by the molding surface of the base material 2 and the optical surface of the mold 1 is widened. At this time, since the resin 3 is always in contact with the vicinity of the innermost peripheral portion of the optical surface 1d of the outer mold 1b, the bubbles 4 are not mixed in the resin layer. In addition, since the relative separation speed between the outer mold 1b and the base material 2 is set to 1 mm / sec or less, in the step of separating the outer mold 1b and the base material 2 even when the high viscosity resin 3 is used, as shown in FIG. As shown, the resin 3a near the optical surface 1d of the outer mold 1b and the resin 3b near the molding surface of the substrate 2 are not separated. Then, after the separation of the outer mold 1b and the base material 2 is started, or at the same time as the separation of the outer mold 1b and the base material 2 is started, the inner mold 1a and the base material 2 are brought close to each other. Therefore, even if the resin supply amount increases, the outermost peripheral portion of the desired resin layer does not protrude from the space formed by the optical surface of the mold 1 and the molding surface of the base material 2.

[0016]

Example 1 First, as shown in FIG. 8, a required amount of ultraviolet curable resin 11 is supplied to the molding surface of a glass substrate 2 having concave surfaces on both sides. Here, a large amount is set in advance so that the outermost peripheral portion of the resin 11 reaches the outside of the effective diameter even when the resin supply amount varies. The base material 2 has a molding surface with a radius of curvature of 18 mm and an outer diameter of 25 mm.
At the outermost peripheral portion of the molding surface, an end surface 2a perpendicular to the central axis and having a radial width of 1.5 mm is provided so as to be axially symmetrical with respect to the central axis of the base material 2.

Next, as shown in FIG. 9, a desired resin layer 12 is formed.
Have an optical surface for forming the same, the central axis is the same as the central axis of the base material 2, and the outer diameter of the surface of the resin layer 12 (the surface pressed by the mold 1) is pressed to each other. Vertically movable inner die 1a (diameter 19 mm) and outer die 1b (inner diameter D1 =
Mold 1 divided into 19 mm and outer diameter D2 = 22 mm)
The resin 11 is spread by lowering the fitting portion of the inner die 1a and the outer die 1b in a tlitche state to bring it closer to the base material 2, and the outermost peripheral portion of the resin 11 reaches the optical surface 1d of the outer die 1b. Let

Here, when the die 1 is lowered, when the resin supply amount is the same as a preset value, the outermost peripheral portion of the resin 11 is the outer die 1b.
It is performed until the position of the diameter D1 + (D2-D1) / 2 of the optical surface 1d is reached. Therefore, even if the resin supply amount varies, the outermost peripheral portion of the resin 11 enters inside the fitting portion of the inner mold 1a and the outer mold 1b, or the outermost peripheral portion of the resin 11 and the mold 1 and the base material. It does not protrude from the space formed by 2 and. Further, since there is no step in the fitting portion between the inner mold 1a and the outer mold 1b, no bubbles are mixed into the resin 11 when the resin 11 is transferred from the inner mold 1a to the outer mold 1b.

The optical surface 1c of the inner mold 1a has a radius of curvature of 16 mm.
The outer surface of the outer die 1b has a planar shape perpendicular to the central axis. In addition, the thickness of the desired resin layer 12 on the central axis before irradiation with energy is 0.1 m.
m, the distance between the outermost mold 1b and the base material 2 in the direction parallel to the central axis in the innermost peripheral portion is 0.6 mm, and the mold 1 is lowered by the resin 3 formed by the mold 1 and the base material 2. Inner optical surface 1 on the central axis in order to prevent it from protruding from the space
It stops when the distance between c and the molding surface of the substrate 2 is 0.15 mm. Therefore, the distance in the direction parallel to the central axis of the substrate 2 and the innermost peripheral portion of the outer die 1b at this time is 0.45 mm.

Next, as shown in FIG. 10, the outer mold 1b is separated from the substrate 2 by 0.15 mm in the opposite direction. Outer mold 1 at this time
The relative separation speed between b and the substrate 2 is 6 mm / sec. Then, the distance between the innermost peripheral portion of the outer die 1b and the substrate 2 becomes a desired value (0.6 mm). At this time, the space formed by the outer mold 1b and the base material 2 is wider than that in the case where there is no step in the fitting portion of the inner mold 1a and the outer mold 1b, so that the variation in the resin supply amount at this portion. It is possible to absorb the resin and prevent the resin 11 from protruding from the space. Also, the outer mold 1
Immediately after the separation of b and the base material 2 is started, the inner mold 1a is adjusted so that the relative approach speed between the inner mold 1a and the base material 2 is 2 mm / sec.
Is resumed, and the thickness of the resin layer 12 on the central axis is set to a desired value (0.1 mm).

Here, the separation of the outer mold 1b from the base material 2 has a function of returning the outermost peripheral portion of the resin 11 to the central axis side.
Since the approach between the base material 2 and the base material 2 serves to expand the outermost peripheral portion of the resin to the outside, by performing both steps simultaneously, the resin 11
The outermost peripheral part of the above does not enter the inside of the fitting part of the inner mold 1a and the outer mold 1b, and does not protrude from the space formed by the mold 1 and the base material 2. After that, when the resin layer 12 is cured by irradiating ultraviolet rays from below the base material 2 by means not shown,
A contact body in which the mold 1, the base material 2 and the resin layer 12 are integrated is formed.

Next, as shown in FIG. 11, when the contact member is raised, the peeling member 13 previously provided above a part of the end surface 2a of the base material 2 is removed from the end surface 2a of the base material 2. Make surface contact with. Here, the lower surface of the peeling member 13 is formed with a flat surface 13a parallel to the end surface 2a of the base material 2. And
The load is first concentrated on a portion of the end surface 2a of the base material 2 where the flat surface 13a of the peeling member 13 is in contact, and then the load is applied to the base material 2
Disperse throughout. Here, as the contact body continues to rise, as shown in FIG. 12, the composite optical element 14 in which the base material 2 and the resin layer 3 are integrated is separated from the mold 1 easily and instantly.

According to this embodiment, the resin layer 12 does not interfere with the optical surface of the mold 1 even if the resin supply amount varies even if no special processing such as forming a groove in the base material 2 is performed. It does not protrude from the space formed by the molding surface of the material 2, and the appearance of the resin layer 12 outside the effective diameter does not deteriorate due to the inclusion of air bubbles.

[0024]

[Embodiment 2] First, as shown in FIG. 13, a necessary amount of the ultraviolet curable resin 11 is supplied to the molding surface of the glass base material 2 having convex surfaces on both sides. Here, the viscosity is 3000 cps so that the resin 11 supplied onto the molding surface of the base material 2 does not easily flow out.
The above resins are used, and the resin supply amount is set in advance so that the outermost peripheral portion of the resin 11 reaches the outside of the effective diameter even if variations occur. The base material 2 has a molding surface with a radius of curvature of 50 mm and an outer diameter of 30 mm.
A V-shaped groove 2b having a width of 3 mm and a depth of 2 mm is provided on the side surface of the base material 2
It is provided so as to have an axially symmetric shape with respect to the central axis of.

Next, as shown in FIG. 14, the desired resin layer 1
2 has an optical surface for forming 2, and the central axis is the base material 2
Of the inner mold 1a (diameter 2
2 mm) and outer mold 1b (inner diameter D1 = 22 mm, outer diameter D2 =
The mold 1 divided into 26 mm) is divided into an inner mold 1a and an outer mold 1b.
The fitting portion is lowered in a tlitchi state to approach the base material 2 to spread the resin 11, and the outermost peripheral portion of the resin 11 reaches the optical surface of the outer mold 1b.

Here, when the die 1 is lowered, the outermost peripheral portion of the resin 11 is located at the position of the diameter D1 + (D2-D1) / 2 of the optical surface 1d of the outer die when the resin supply amount is the same as the preset value. Do it until you reach it. Therefore, even when the resin supply amount varies, the outermost peripheral portion of the resin 11 is located at the inner mold 1a and the outer mold 1.
It does not enter the inside of the fitting part of b or the outermost peripheral part of the resin 11 protrudes from the space formed by the mold 1 and the base material 2. Further, since there is no step in the fitting portion between the inner mold 1a and the outer mold 1b, air bubbles are not mixed in the resin 11 when the resin 11 is transferred from the inner mold 1a to the outer mold 1b.

The optical surface 1c of the inner mold 1a has a radius of curvature of 54 mm.
The optical surface 1d of the outer mold 1b has a planar shape perpendicular to the central axis. Further, the thickness on the central axis of the desired resin layer 12 before irradiation with energy is 0.5 m.
m, the distance from the innermost peripheral portion of the outer die 1b to the base material 2 in the direction parallel to the central axis is 0.3 mm, and the mold 1 is lowered by the resin 11 formed by the die 1 and the base material 2. In order to prevent the optical surface 1c having the inner diameter 1a on the central axis from the molding surface of the base material 2, it stops at a point of 0.1 mm in order to prevent it from protruding from the space. Therefore, the distance in the direction parallel to the central axis of the substrate 2 and the innermost peripheral portion of the outer die 1b at this time is 0.15 mm.

Next, as shown in FIG. 15, the outer mold 1b is separated from the substrate 2 by 0.15 mm in the opposite direction. Outer mold 1 at this time
The relative separation speed between b and the substrate 2 is 0.75 mm / sec. Then, the distance between the innermost peripheral portion of the outer die 1b and the base material 2 becomes a desired value (0.3 mm). At this time, the space formed by the outer mold 1b and the base material 2 is wider than that in the case where there is no step in the fitting portion of the inner mold 1a and the outer mold 1b, so that the variation in the resin supply amount at this portion. It is possible to absorb the resin and prevent the resin 11 from protruding from the space.

Further, since the relative separation speed between the outer mold 1b and the base material 2 is extremely slow, such as 0.75 mm / sec, even when the resin 11 having a high viscosity is used, the outer mold 1b and the base material 2 are used. The resin 1 between the outer mold 1b and the base material 2 when separating the
There is no possibility that air bubbles are mixed in the resin 11 by dividing 1 in the middle. Immediately after the separation between the outer mold 1b and the base material 2 is started, the relative approach speed between the inner mold 1a and the base material 2 is 0.25 mm / s.
The lowering of the inner mold 1a is restarted so as to be ec, and the thickness of the resin layer 12 on the central axis is also set to a desired value (0.05 mm).

Here, the separation between the outer mold 1b and the base material 2 has a function of returning the outermost peripheral portion of the resin 11 to the central axis side, and the inner mold 1a.
Since the approach between the base material 2 and the base material 2 serves to expand the outermost peripheral portion of the resin 11 to the outside, the outermost peripheral portion of the resin 11 can be moved from the fitting portion of the inner die 1a and the outer die 1b by performing both steps at the same time. It does not enter the inside or protrude from the space formed by the mold 1 and the base material 2. Then, the resin layer 12 is cured by irradiating ultraviolet rays from below the base material 2 by means (not shown) to form a contact body in which the mold 1, the base material 2 and the resin layer 12 are integrated.

Next, as shown in FIG. 16, the tip portion 13b is provided in advance on the outer peripheral portion of the side surface of the base material 2, and the tip portion 13b is formed by inverting the V-shaped groove 2b on the side surface of the base material 2 for peeling. The member 13 is moved closer to the central axis, and the tip portion 1 of the peeling member 13 is
3b is brought into contact with the V-shaped groove 2b on the side surface of the base material 2. Here, the position of the peeling member 13 is adjusted so that the tip portion 13b of the peeling member 13 can be inserted into the v-shaped groove 2b on the side surface of the base material 2.

Then, when the contact member is raised, the load is first concentrated on a portion of the side surface of the base material 2 where the peeling member 13 of the V-shaped groove 2b contacts, and then the load is dispersed over the entire base material 2. . Here, as the contact body continues to rise, as shown in FIG. 17, the base material 2 and the resin layer 1 are easily and instantly removed from the mold 1.
The composite optical element 14 in which 2 and 1 are integrated is peeled off.

According to this embodiment, the resin layer 12 and the optical surface of the mold 1 can be formed on the base surface of the mold 1 without any special processing such as providing a groove on the base material 2 even if the resin supply amount varies. There is no protrusion from the space formed by the molding surface of the material 2, and there is no deterioration of the appearance due to the inclusion of bubbles in the protrusions outside the effective diameter of the resin layer 12. Further, even when the viscosity of the resin 11 is high, bubbles are not mixed in the resin 11, and the same effect can be obtained even when the molding surface is convex and the radius of curvature is small.

[0034]

[Embodiment 3] First, as shown in FIG. 18, the ultraviolet curable resin 11 is applied to the molding surface of a glass base material 2 having a concave molding surface and a convex non-molding surface (the surface on which the resin layer is not placed). Supply the required amount. Here, the resin supply amount is set to a large amount in advance so that the outermost peripheral portion of the resin 11 reaches the outside of the effective diameter even if variations occur. The base material 2 has a molding surface with a radius of curvature of 18 mm and an outer diameter of 25 mm, and the outermost peripheral portion of the molding surface of the base material 2 has an end surface perpendicular to the central axis and having a radial width of 1.5 mm. 2a is provided so as to have an axially symmetrical shape with respect to the central axis of the base material 2.

Next, as shown in FIG. 19, the desired resin layer 1
2 has an optical surface for forming 2, and the central axis is the base material 2
The center axis of the inner mold 1a (diameter 19 mm) and the outer mold 1b (inner diameter D1) are vertically movable at a position that presses the outside of the effective diameter of the surface of the resin layer 12 (the surface pressed by the mold 1).
= 19 mm, outer diameter D2 = 22 mm), and the resin 11 is spread by lowering the mold 1 with the fitting portion of the inner mold 1a and the outer mold 1b being in the state of tritch to approach the base material 2. The outermost peripheral portion of the resin 11 reaches the optical surface 1d of the outer mold 1b. Further, the die 1 is lowered until the outermost peripheral portion of the resin reaches the position of the diameter D1 + 2 (D2-D1) / 3 of the optical surface 1d of the outer die 1b when the resin supply amount is the same as the preset value. .

Therefore, even when the variation in the resin supply amount is large, the outermost peripheral portion of the resin 11 enters inside the fitting portion of the inner mold 1a and the outer mold 1b, or the outermost peripheral portion of the resin 11 and the mold 1 are the same. It does not protrude from the space formed by the material 2. Further, since there is no step in the fitting portion between the inner mold 1a and the outer mold 1b, no bubbles are mixed into the resin 11 when the resin 11 is transferred from the inner mold 1a to the outer mold 1b. here,
The optical surface 1c of the inner die 1a has a convex shape with a radius of curvature of 16 mm, and the optical surface 1d of the outer die 1b has a planar shape perpendicular to the central axis.

The thickness of the desired resin layer 12 on the central axis before irradiation with energy is 0.1 mm, and the distance from the base material 2 in the direction parallel to the central axis in the innermost peripheral portion of the outer die 1b. Is 0.6 mm, and in order to prevent the resin 11 from falling out of the space formed by the mold 1 and the base material 2 when the mold 1 descends, the optical surface 1c of the inner mold 1a on the central axis is Base material 2
It stops when the distance from the molding surface is 0.15 mm. Therefore, the distance in the direction parallel to the innermost peripheral portion of the outer die 1b and the central axis of the base material 2 at this time is 0.45 mm.

Next, as shown in FIG. 20, the outer mold 1b is separated from the base material 2 by 0.15 mm in the opposite direction. Outer mold 1 at this time
The relative separation speed between b and the substrate 2 is 6 mm / sec.
Then, the distance between the innermost peripheral portion of the outer mold 1b and the base material 2 becomes a desired value (0.6 mm). At this time, the space formed by the outer mold 1b and the base material 2 is wider than that in the case where there is no step in the fitting portion of the inner mold 1a and the outer mold 1b, so that the variation in the resin supply amount at this portion. It is possible to absorb the resin and prevent the resin 11 from protruding from the space. Immediately after the separation between the outer mold 1b and the base material 2 is started, the inner mold 1a is adjusted so that the relative approach speed between the inner mold 1a and the base material 2 becomes 2 mm / sec.
The descent of “a” is restarted to set the thickness of the resin layer 12 on the central axis to a desired value (0.1 mm).

Here, the separation of the outer mold 1b from the base material 2 has a function of returning the outermost peripheral portion of the resin 11 to the central axis side.
Since the approach between the base material 2 and the base material 2 serves to expand the outermost peripheral portion of the resin 11 to the outside, the outermost peripheral portion of the resin 11 can be moved from the fitting portion of the inner die 1a and the outer die 1b by performing both steps at the same time. It does not enter the inside or protrude from the space formed by the mold 1 and the base material 2. Next, the resin layer 12 is cured by irradiating ultraviolet rays from below the base material 2 by means (not shown) to form a contact body in which the mold 1, the base material 2 and the resin layer 12 are integrated.

Next, as shown in FIG. 21, when the contact member is raised, the peeling member 13 previously provided above a part of the end surface 2a of the base material 2 is removed from the end surface 2a of the base material 2. Make surface contact with. Here, the lower surface of the peeling member 13 is formed with a flat surface 13a parallel to the end surface 2a of the base material 2. And
The load is first concentrated on a portion of the end surface 2a of the base material 2 where the flat surface 13a of the peeling member 13 is in contact, and then the load is applied to the base material 2
Disperse throughout. Here, as the contact body continues to rise, as shown in FIG. 22, the composite optical element 14 in which the base material 2 and the resin layer 12 are integrated is easily and instantly peeled off from the mold 1.

According to the present embodiment, the resin layer 12 and the optical surface of the mold 1 are not affected by the resin layer 12 even if the resin supply amount varies even if the substrate 2 is not lowered, for example. There is no protrusion from the space formed by the molding surface of the material 2, and there is no deterioration of the appearance due to the inclusion of bubbles in the protrusions outside the effective diameter of the resin layer 12.

[0042]

The effect of the present invention is that even if the resin is not supplied with a special process such as forming a groove, the resin is not mixed with the optical surface of the mold and the substrate even if the resin supply amount varies. It is possible to manufacture a composite optical element that does not protrude from the space formed by the molding surface and does not deteriorate in appearance due to inclusion of air bubbles in the protrusions outside the effective diameter of the resin layer.

The effect of claim 2 is that, even if no special processing such as forming a groove in the base material is performed, even if the resin supply amount varies, the resin is used as the optical surface of the mold and the molding surface of the base material. It is possible to manufacture a composite type optical element that does not protrude from the space formed by and does not deteriorate in appearance due to inclusion of bubbles in protrusions outside the effective diameter of the resin layer even when the resin has high viscosity. Is.

[Brief description of drawings]

FIG. 1 is a half cross-sectional view showing a conventional example.

FIG. 2 is a half sectional view showing a conventional example.

FIG. 3 is a half sectional view showing a conventional example.

FIG. 4 is a half sectional view showing the present invention.

FIG. 5 is a half sectional view showing the present invention.

FIG. 6 is a half sectional view showing the present invention.

FIG. 7 is a half sectional view showing the present invention.

FIG. 8 is a cross-sectional view showing the first embodiment.

FIG. 9 is a cross-sectional view showing the first embodiment.

FIG. 10 is a cross-sectional view showing the first embodiment.

FIG. 11 is a cross-sectional view showing the first embodiment.

FIG. 12 is a cross-sectional view showing the first embodiment.

FIG. 13 is a cross-sectional view showing a second embodiment.

FIG. 14 is a cross-sectional view showing a second embodiment.

FIG. 15 is a cross-sectional view showing a second embodiment.

FIG. 16 is a cross-sectional view showing a second embodiment.

FIG. 17 is a cross-sectional view showing a second embodiment.

FIG. 18 is a cross-sectional view showing a third embodiment.

FIG. 19 is a cross-sectional view showing a third embodiment.

FIG. 20 is a cross-sectional view showing a third embodiment.

FIG. 21 is a cross-sectional view showing a third embodiment.

FIG. 22 is a cross-sectional view showing a third embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Mold 2 Base material 3,11 Resin 4 Bubble 12 Resin layer 13 Member for peeling 14 Composite optical element

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Claims (2)

[Claims] 1. A mold in which an inner mold having an effective surface for forming a desired resin layer surface and an outer mold fitted to the inner mold are vertically formed, and an energy curable resin is supplied. In the manufacturing method for obtaining a composite type optical element by forming a resin layer by bringing the resin close to the base material and pressing and spreading the resin, the resin in contact with the mold in the manufacturing method for curing the resin layer by irradiation of energy When the outermost peripheral part of the inner mold optical surface transitions from the outer mold optical surface to the outer mold optical surface of the inner mold and the outermost optical part of the outer mold optical surface without a step A method for manufacturing a composite-type optical element, characterized in that the outer die and the base material are relatively separated from each other while being pressed and before the thickness of the resin on the central axis reaches a desired value. 2. The energy-curable resin has a viscosity of 3
The method for producing a composite optical element according to claim 1, wherein, in the case of 000 cps or more, the outer mold and the base material are relatively separated from each other at a relative separation speed of 1 mm / sec or less.