WO2017022500A1 - Method for adhesion fixing of optical assembly, and optical assembly - Google Patents

Abstract

This method for adhesion-fixing an optical assembly comprises forming an optical assembly by adhesion-fixing a plurality of assembly constituent components including an assembly constituent component having an optical component, the method for adhesion-fixing an optical assembly including: interposing an ultraviolet-curing adhesive and a thermosetting adhesive between components to be fixed to each other among the plurality of assembly constituent components and assembling the components to be fixed to each other; retaining the plurality of assembly constituent components so that the components can move relative to each other in an uncured state of the ultraviolet-curing adhesive and the thermosetting adhesive, and adjusting the relative positions of the plurality of assembly constituent components; curing the ultraviolet-curing adhesive in a state in which the plurality of assembly constituent components are retained in the adjusted positions; retaining one of the plurality of assembly constituent components after the ultraviolet-curing adhesive is cured and releasing retention of the remainder of the plurality of assembly constituent components; and curing the thermosetting adhesive in a state in which one of the plurality of assembly constituent components is retained.

Description

Adhesive fixing method of optical assembly and optical assembly

The present invention relates to a method of adhesively fixing an optical assembly and an optical assembly.
Priority is claimed on Japanese Patent Application No. 2015-154446, filed Aug. 4, 2015, the content of which is incorporated herein by reference.

Conventionally, when an optical assembly including an optical component such as a lens is formed, the assembly components constituting the optical assembly may be adhesively fixed to each other.
In the case where the assembly components are adhesively fixed to each other, the assembly components can be adjusted in position by holding the assembly components by the movable fixture. For this reason, bonding and fixing may be used in the manufacture of a lens unit that requires lens position adjustment.
As an adhesive used for adhesion | attachment of an optical assembly, an ultraviolet curing adhesive, a thermosetting adhesive, etc. are mentioned, for example.
For example, Patent Document 1 discloses an indirect bonding structure in which a first member holding a lens and a second member holding an imaging device are bonded using an ultraviolet curing adhesive via a fixing member. An imaging device is described, which is joined by a filled adhesive structure filled with a thermosetting adhesive.

Japanese Unexamined Patent Publication No. 2010-263606

However, the prior art as described above has the following problems.
UV curing adhesives are suitable for high precision adhesive fixing of optical components since they do not need to be heated. However, the UV curable adhesive has a problem that the adhesive strength is inferior to that of the thermosetting adhesive.
On the other hand, thermosetting adhesives need to be heated in order to cure. At that time, there is a possibility that the relative position after curing may differ from the position at the time of adjustment due to the difference in the thermal expansion coefficient of the assembly components and the holding jig for holding these.
Patent Document 1 describes that an ultraviolet curing adhesive and a thermosetting adhesive are used in combination in an adhesive structure.
However, in the technology described in Patent Document 1, since the ultraviolet curing adhesive is applied to the fixing member disposed between the lens cell and the substrate, the lens cell and the substrate are indirectly bonded. . On the other hand, the thermosetting adhesive is directly applied and cured between the lens cell and the substrate.
When heated at the time of heat curing, a curing portion and a fixing member by the ultraviolet curing adhesive between the lens cell and the substrate and a holding jig for holding the lens cell and the substrate are thermally deformed. As a result, there is a possibility that the position at the time of adjustment may change.
In particular, in the case where the lens is adhesively fixed to the holding frame after the eccentricity adjustment of the lens is performed, even a slight positional deviation is often unacceptable. The use of a thermoset adhesive may result in less than desirable optical properties.

In order to avoid such a problem due to adhesion and fixation, it is also conceivable to use a spacer for adjusting the position of assembly components. However, in this case, the measurement of the adjustment position and the arrangement of the spacer can not be performed simultaneously, so it is necessary to alternately repeat the measurement operation of the adjustment position and the attachment and detachment operation of the spacer. For this reason, there is a problem that much time is required for position adjustment and fixation.

The present invention has been made in view of the above problems, and a method and apparatus for bonding and fixing an optical assembly capable of fixing each assembly component of the optical assembly with high strength and high accuracy. Intended to provide.

In order to solve the above problems, the method for adhesively fixing an optical assembly according to the first aspect of the present invention is an optical method by adhesively fixing a plurality of assembly components including an assembly component having an optical component. A method of adhesively fixing an optical assembly forming an assembly, comprising: assembling a UV curable adhesive and a thermosetting adhesive between parts of the plurality of assembly components to be fixed to each other And holding the plurality of assembly components relatively movably in the uncured state of the ultraviolet curing adhesive and the thermosetting adhesive, and adjusting the relative positions of the plurality of assembly components. And curing the UV curable adhesive in a state where the plurality of assembly components are held in the adjusted position, and after the UV curable adhesive is cured, the plurality of assembly components. Holding one of the plurality of assembly components and holding the other of the plurality of assembly components, and curing the thermosetting adhesive while holding one of the plurality of assembly components And to include.

An optical assembly according to a second aspect of the present invention is an optical assembly in which a plurality of assembly components including an assembly component having an optical component are adhesively fixed via an adhesive curing unit, The first assembly component and the second assembly component which are adhesively fixed to each other among the assembly components of the above each have a holding portion at a portion that can be held and released independently of each other The adhesive curing portion is fitted with a relatively movable gap in an uncured state, and the adhesive curing portion between the first assembly component and the second assembly component is An ultraviolet curing adhesive cured portion formed by curing of an ultraviolet curing adhesive filled in a first region between the first assembly component and the second assembly component; Said first assembly component Containing a thermosetting adhesive hardened portion formed by the thermosetting adhesive filled in the second region is cured between the second assembly components.

According to the adhesive fixing method of the optical assembly and the optical assembly of the present invention, each assembly component is held to cure the ultraviolet curing adhesive and to cure the thermosetting adhesive. Since one can be held and the other can be released, there is an effect that each assembly component of the optical assembly can be fixed with high strength and high accuracy.

It is a typical sectional view showing an example of the optical assembly of a 1st embodiment of the present invention. It is the A view in FIG. 1A. It is a BB sectional view in FIG. 1A. It is a flowchart which shows the flow of the adhesion fixation method of the optical assembly of 1st Embodiment of this invention. It is process explanatory drawing at the time of hardening an ultraviolet curing adhesive in the adhesion fixing method of the optical assembly of the 1st Embodiment of this invention. It is process explanatory drawing at the time of hardening a thermosetting adhesive in the adhesive fixing method of the optical assembly of the 1st Embodiment of this invention. It is a typical sectional view showing an example of the optical assembly of a 2nd embodiment of the present invention. It is CC sectional drawing in FIG. 5A. It is a typical sectional view showing an example of the 1st assembly component used for the optical assembly of a 2nd embodiment of the present invention. It is a typical sectional view showing an example of the 2nd assembly component used for the optical assembly of a 2nd embodiment of the present invention. It is process explanatory drawing at the time of hardening an ultraviolet curing adhesive in the adhesive fixing method of the optical assembly of the 2nd Embodiment of this invention. It is process explanatory drawing at the time of hardening a thermosetting adhesive in the adhesive fixing method of the optical assembly of the 2nd Embodiment of this invention. It is a typical sectional view showing an example of the optical assembly of a 3rd embodiment of the present invention. It is process explanatory drawing at the time of hardening an ultraviolet curing adhesive in the adhesive fixing method of the optical assembly of the 3rd Embodiment of this invention. It is process explanatory drawing at the time of hardening a thermosetting adhesive in the adhesive fixing method of the optical assembly of the 3rd Embodiment of this invention. It is a typical sectional view showing an example of the optical assembly of a 4th embodiment of the present invention. It is a typical sectional view showing an example of the optical assembly of a 5th embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described with reference to the attached drawings. In all the drawings, the same or corresponding members are denoted by the same reference numerals even if the embodiment is different, and the common description is omitted.

First Embodiment
An optical assembly according to a first embodiment of the present invention will be described.
FIG. 1A is a schematic cross-sectional view showing an example of an optical assembly according to a first embodiment of the present invention. FIG. 1B is a view A in FIG. 1A. FIG. 1C is a cross-sectional view taken along the line BB in FIG. 1A.
In the drawings, the dimensions and shapes are exaggerated or simplified because they are schematic diagrams (the same applies to the following drawings).

In the present specification, for example, when describing the relative position of an axial or cylindrical member capable of specifying an axis such as a central axis or a lens optical axis, “axial direction”, “circumferential direction”, “radial direction” May be used. "Axial" is the direction along the axis. The "circumferential direction" is a direction of rotation around an axis. The “radial direction” is a direction along a line intersecting the axis in a plane perpendicular to the axis. In particular, the direction along the lens optical axis may be referred to as the optical axis direction. In the radial direction, the side away from the axis may be referred to as the radially outer side, and the side approaching the axis may be referred to as the radially inner side.

As shown in FIG. 1A, an optical assembly 1 according to this embodiment includes a first component 2 (assembly component, first assembly component) and a second component 3 (assembly component, second assembly) The three-dimensional components are aligned with each other, and then adhesively fixed by the adhesive fixing method of the optical assembly of this embodiment described later.
The optical assembly 1 includes a first component 2, a second component 3, an ultraviolet curing adhesive curing unit 4, and a thermosetting adhesive curing unit 5.

The optical assembly 1 includes at least one optical component. The application of the optical assembly 1 is not particularly limited. When the optical assembly 1 includes a lens, it can be used, for example, as an appropriate optical lens unit used for a camera, a microscope, an endoscope and the like.
However, the optical components included in the optical assembly 1 are not limited to lenses. The optical components included in the optical assembly 1 may be optical components such as a cover glass, a mirror, a prism, a filter, and an optical fiber. Furthermore, the optical component included in the optical assembly 1 may be, for example, an imaging device, a light emitting device, or a light receiving device used for an imaging device.
The optical assembly 1 may be, for example, a form that itself constitutes a product, such as an interchangeable lens, or a part that is fixed to a part of the product. Furthermore, the optical assembly 1 may be a semi-finished product such as a replacement unit that constitutes a part of a product, or a subassembly that appears only in the manufacturing process of the product.

In the present embodiment, in the optical assembly 1, at least one of the first component 2 and the second component 3 includes an optical component. At least one of the first component 2 and the second component 3 is the optical component itself or consists of a subassembly comprising the optical component.
When at least one of the first component 2 and the second component 3 consists of a subassembly including an optical component, it may be a subassembly including a plurality of members in addition to the optical component.
When at least one of the first part 2 and the second part 3 consists of a subassembly, the members in the subassembly are fixed to each other by appropriate means so that the relative position of each other in the subassembly is constant. It is kept in a relationship.

As shown in FIGS. 1A and 1B, the first part 2 has a substantially cylindrical (including cylindrical) outer shape.
The outer peripheral surface 2a at one end of the first component 2 constitutes a holding portion 2A that can be held by a holding jig 9 (see FIG. 3) described later.
The holding portion 2A may be made of metal or resin as long as the holding portion 2A has a rigidity that does not deform by holding the holding jig 9. However, an optical surface (for example, a lens surface, a mirror surface, an element surface, etc.) in the optical component is not formed in the holding portion 2A.
The holding portion 2A may be formed on the entire circumference of the outer peripheral surface 2a. However, the holding portion 2A may be formed to be separated in the circumferential direction as long as positioning in the radial direction can be held by the holding jig 9 described later.

A second bonding surface 2C is formed on the outer peripheral surface 2a at an end opposite to the holding portion 2A in the axial direction, to which a thermosetting adhesive cured portion 5 described later adheres closely.
The second adhesive surface 2C may be a smooth surface or a rough surface as long as the necessary adhesive strength is obtained.
Furthermore, the second adhesive surface 2C may be an uneven surface. The material of the second bonding surface 2C may be, for example, metal or resin.
The second bonding surface 2C may be formed continuously in the circumferential direction, or may be formed spaced apart in the circumferential direction. Below, as an example, it explains by the example formed over the perimeter of peripheral face 2a.

On the outer peripheral surface 2a, a first adhesive surface 2B is formed between the holding portion 2A and the second adhesive surface 2C, to which an ultraviolet curable adhesive cured portion 4 described later adheres.
The first adhesive surface 2B may be a smooth surface or a rough surface as long as the necessary adhesive strength is obtained.
Furthermore, the first adhesive surface 2B may be an uneven surface. The material of the first bonding surface 2B may be, for example, metal or resin.
The first adhesive surface 2B may be formed continuously in the circumferential direction, or may be formed spaced apart in the circumferential direction. Below, as an example, it explains by the example formed over the perimeter of peripheral face 2a.
In the present embodiment, the outer shape of the first component 2 is described as an example having a substantially cylindrical shape. However, the outer shape of the first component 2 is not particularly limited as long as it can be inserted into the inner peripheral surface 3c of the cylindrical portion 3a of the second component 3 described later at least in the range excluding the holding portion 2A. For example, the outer shape of the first component 2 may be prismatic.

As shown in FIGS. 1A and 1C, the second part 3 has a substantially cylindrical (including the case of a cylinder) cylindrical portion 3a and a bottom 3b formed at one end in the axial direction of the cylindrical portion 3a. Equipped with

The inner diameter of the inner peripheral surface 3c of the cylindrical portion 3a has a size that allows the first component 2 to be inserted therein at least in a range excluding the holding portion 2A.
When the first component 2 is inserted into the tubular portion 3a, the dimension of the gap formed between the outer peripheral surface 2a of the first component 2 and the inner peripheral surface 3c of the second component 3 is the first It is larger than the positional adjustment amount of the component 2 and the second component 3 in the radial direction.

When the second component 3 includes an optical component, the optical component may constitute part or all of the bottom 3 b. Alternatively, in the bottom portion 3b, a through hole may be formed in the thickness direction, and an optical component such as a lens may be arranged to close the through hole.

The outer peripheral surface 3d of the second part 3 constitutes a holding portion 3A that can be held by a holding jig 10 (see FIG. 3) described later. The holding portion 3A may be formed on the entire outer peripheral surface 3d in the axial direction, or may be formed on only a part of the axial direction. In the present embodiment, the holding portion 3A is formed, for example, at an end portion of the outer peripheral surface 3d close to the bottom portion 3b.
The holding portion 3A may be made of metal or resin as long as the holding portion 3A has a rigidity that does not deform by holding the holding jig 10. However, an optical surface (for example, a lens surface, a mirror surface, an element surface, etc.) of the optical component is not formed in the holding portion 3A.
The holding portion 3A may be formed on the entire periphery of the outer peripheral surface 3d. However, the holding portions 3A may be formed to be separated in the circumferential direction as long as positioning in the radial direction can be held by the holding jig 10 described later.

On the inner peripheral surface 3c of the cylindrical portion 3a, at the end opposite to the bottom 3b in the axial direction, a second bonding surface 3C to which a thermosetting adhesive cured portion 5 described later adheres is formed.
The second adhesive surface 3C is formed at a portion that can face the second adhesive surface 2C of the first component 2 when the first component 2 is inserted into the inner peripheral surface 3c and positionally adjusted as described later. ing.
The second adhesive surface 3C may be a smooth surface or a rough surface as long as the required adhesive strength is obtained. Furthermore, the second adhesive surface 3C may be an uneven surface.
The material of the second bonding surface 3C may be, for example, metal or resin. However, when the second adhesive surface 3C is made of metal, the thermal conductivity is improved, and therefore, the thermal curing can be promoted.
The second adhesive surface 3C may be formed continuously in the circumferential direction or may be formed spaced apart in the circumferential direction. Below, as an example, it explains by the example formed over the perimeter of inner skin 3c.

A first bonding surface 3B to which an ultraviolet curing adhesive cured portion 4 to be described later adheres is formed on an end surface 3e of the cylindrical portion 3a and an inner peripheral surface 3c in the vicinity of the end surface 3e.
The first adhesive surface 3B is formed at a position that can face the first adhesive surface 2B of the first component 2 when the first component 2 is inserted into the inner circumferential surface 3c and positionally adjusted as described later. Ru.
The first adhesive surface 3B may be a smooth surface or a rough surface as long as the necessary adhesive strength is obtained. Furthermore, the first adhesive surface 3B may be an uneven surface.
The material of the first bonding surface 3B may be, for example, metal or resin.
The first adhesive surface 3B may be formed continuously in the circumferential direction, or may be formed spaced apart in the circumferential direction. In the following, as an example, an example in which the tip surface 3e and the inner circumferential surface 3c are formed over the entire circumference will be described.
In the present embodiment, the cylindrical portion 3a of the second part 3 is described as being substantially cylindrical. However, the cylindrical portion 3a of the second part 3 is not limited to a substantially cylindrical shape. For example, the cylindrical portion 3a of the second component 3 may have a rectangular cylindrical shape.

As shown in FIG. 1A, FIG. 1B and FIG. 1C, the ultraviolet curing adhesive curing portion 4 is between the second part 3 and the first part 2 inserted into the cylindrical portion 3a of the second part 3 It is formed by curing the UV curable adhesive filled in.
In the present embodiment, the ultraviolet curing adhesive curing portion 4 is formed by curing the ultraviolet curing adhesive filled between the first bonding surface 2B and the first bonding surface 3B. Thus, the region between the first adhesive surface 2B and the first adhesive surface 3B constitutes a first region between the first assembly component and the second assembly component.
The ultraviolet curing adhesive curing portion 4 may be formed over the entire circumference between the first bonding surface 2B and the first bonding surface 3B, or may be formed at a plurality of places separated in the circumferential direction. In the present embodiment, as an example, an example formed over the entire circumference will be described (see FIG. 1B).

The type of the UV curable adhesive forming the UV curable adhesive cured portion 4 is not particularly limited. As an example of the ultraviolet curing adhesive which forms the ultraviolet curing adhesive hardening part 4, an acrylic ultraviolet curing adhesive is mentioned, for example.

The thermosetting adhesive curing unit 5 cures the thermosetting adhesive filled between the second component 3 and the first component 2 inserted into the cylindrical portion 3 a of the second component 3. It is formed.
In the present embodiment, the thermosetting adhesive cured portion 5 is formed by curing the thermosetting adhesive filled between the second adhesive surface 2C and the second adhesive surface 3C. Thus, the region between the second adhesive surface 2C and the second adhesive surface 3C constitutes a second region between the first assembly component and the second assembly component.
The thermosetting adhesive cured portion 5 may be formed over the entire circumference between the second bonding surface 2C and the second bonding surface 3C, or may be formed at a plurality of places separated in the circumferential direction. In the present embodiment, as an example, an example formed over the entire circumference will be described (see FIG. 1C).

The type of the thermosetting adhesive forming the thermosetting adhesive cured portion 5 is not particularly limited. As an example of the thermosetting adhesive which forms the thermosetting adhesive hardening part 5, an epoxy-type thermosetting adhesive is mentioned, for example.

Next, a method of manufacturing the optical assembly 1 will be described focusing on the method of bonding and fixing the optical assembly of the present embodiment.
FIG. 2 is a flow chart showing the flow of the method for adhesively fixing the optical assembly according to the first embodiment of the present invention. FIG. 3: is process explanatory drawing at the time of hardening an ultraviolet curing adhesive in the adhesive fixing method of the optical assembly of 1st Embodiment of this invention. FIG. 4: is process explanatory drawing at the time of hardening a thermosetting adhesive in the adhesive fixing method of the optical assembly of 1st Embodiment of this invention.

In order to manufacture the optical assembly 1, after the first component 2 and the second component 3 are manufactured, steps S1 to S5 shown in FIG. 2 are performed according to the flow of FIG.

In step S1, as shown in FIG. 3, the ultraviolet curing adhesive 4L and the thermal curing are formed between the first part 2 and the second part 3 which are a plurality of assembly components and are parts to be fixed to each other. Assemble with the adhesive 5 L interposed.
This step can be performed, for example, as follows.
First, the holding portion 2A of the first component 2 is held by the holding jig 9, and the holding portion 3A of the second component 3 is held by the holding jig 10.
The configurations of the holding jigs 9 and 10 are not particularly limited as long as the holding portions 2A and 3A of the first component 2 and the second component 3 can be held, respectively. For example, as the holding jigs 9 and 10, a mechanical chuck mechanism may be employed, or a vacuum suction mechanism may be employed.

Next, the holding jigs 9 and 10 are moved relative to each other, and the first part 2 is inserted inside the cylindrical portion 3 a of the second part 3 held by the holding jig 10. The first component 2 is inserted to a position where the second adhesive surface 2C faces the second adhesive surface 3C of the second component 3. At this time, the first adhesive surface 2B of the first component 2 is located in the vicinity of the front end surface 3e of the second component 3, and the first adhesive surface 3B is located radially outside the first adhesive surface 2B.
Next, the thermosetting adhesive 5L is filled between the second adhesive surfaces 2C and 3C using, for example, a syringe (not shown) or the like.
Next, for example, using a syringe (not shown) or the like, the ultraviolet curing adhesive 4L is filled between the first adhesive surfaces 2B and 3B.
Above, step S1 is completed.

However, the above operation is an example of the operation of step S1. In step S1, an operation different from this may be performed.
For example, the thermosetting adhesive 5L may be applied to at least one of the second bonding surface 2C and the second bonding surface 3C, and then the first component 2 may be inserted into the second component 3. In this case, before the first component 2 is inserted, at least one of the first adhesive surfaces 2B and 3B may be coated with the ultraviolet curing adhesive 4L.
Furthermore, when the present step is performed, it is not essential to use the holding jigs 9 and 10. The first part 2 is inserted into the second part 3 without using the holding jigs 9 and 10, and the ultraviolet curing adhesive 4L and the thermosetting adhesive 5L are applied, and this assembly is subjected to the next step S2 , May be held by the holding jigs 9 and 10.

Next, step S2 is performed. In this step, the first part 2 and the second part 3 are held so as to be relatively movable in a state in which the ultraviolet curing adhesive 4L and the thermosetting adhesive 5L are uncured, and the first part 2 and the second part 3 Adjust the relative position of
The first part 2 is fitted in the cylindrical portion 3 a of the second part 3 with a gap. The first component 2 is relatively movable in the range of the gap between the first component 2 and the cylindrical portion 3 a of the second component 3.
In the present embodiment, since the first component 2 and the second component 3 are held by the holding jigs 9 and 10 in step S1, adjustment of the relative position between the first component 2 and the second component 3 is immediately performed. Can be started.

As adjustment of relative position, adjustment of suitable position and posture according to movement freedom of holding jigs 9 and 10 is possible.
For example, if the relative freedom of movement of the holding jigs 9 and 10 is 6 degrees of freedom, adjustment of the axial, radial and circumferential positions of the first part 2 with respect to the second part 3 and the second Adjustment of the inclined attitude is possible by tilting in a direction intersecting the central axis of the part 3.
The adjustment of the relative position may be performed only for the optical assembly 1.

In the adjustment of the relative position, the measuring means of the measurement of the reference adjustment amount is not particularly limited. For example, the relative positional deviation amount between the first part 2 and the second part 3 may be measured by an appropriate position sensor, length measuring means, or the like. Furthermore, when at least one of the first component 2 and the second component 3 includes a lens, the inspection light is made incident on the lens, optical measurement of transmitted light and reflected light of the inspection light is performed, and the optical measurement value is a target Adjustments may be made to reach values.
Examples of optical measurement include, for example, light intensity measurement, aberration measurement, focal position measurement, angle of view measurement, and the like.

When the relative position adjustment of the first part 2 and the second part 3 is completed, step S2 is ended.

Next, step S3 is performed. In this step, the ultraviolet curing adhesive 4L is cured in a state in which the first part 2 and the second part 3 are held at the adjusted positions.
Specifically, when the step S2 is completed, as shown in FIG. 3, the UV curable adhesive 4L is cured by irradiating the UV light L to the portion to which the UV curable adhesive 4L has been applied.
When the ultraviolet curing adhesive 4L is UV cured by the UV light L, the UV curing adhesive cured portion 4 is formed.
Above, step S3 is completed.

Next, step S4 is performed. In this step, one of the first part 2 and the second part 3 is held, and the other is held and released.
In the present embodiment, the holding portion 3A is formed on the outer peripheral portion of the cylindrical portion 3a of the second part 3, and the holding portion 2A protrudes outward of the cylindrical portion 3a of the second part 3. It is formed in the outer peripheral surface 2a. For this reason, the holding portions 2A and 3A are holding portions formed independently at portions that can be held and released. That is, holding one of the holding portions 2A and 3A does not prevent the other holding release.
Therefore, it is possible to release the holding of one of the first part 2 and the second part 3 while holding the other.
Either of the first part 2 and the second part 3 may be released from holding, but may be determined appropriately in consideration of, for example, the ease of heating in step S5 described later.
In the present embodiment, as shown in FIG. 4, as one example, holding of the holding portion 2A by the holding jig 9 is released.
Above, step S4 is completed.

Next, step S5 is performed. In this step, the thermosetting adhesive 5L is cured while holding one of the first part 2 and the second part 3.
Specifically, when step S4 is completed, as shown in FIG. 4, the portion to which the thermosetting adhesive 5L is applied is heated to cure the thermosetting adhesive 5L.
The heating means is not particularly limited.
For example, a heating means may be used which locally heats the back side of the second bonding surface 3C by blowing warm air from the radially outer side to the cylindrical portion 3a.
For example, in a state where the second component 3 is held by the holding jig 10, it may be carried into the heating tank to heat the first component 2 and the second component 3 entirely.
When the thermosetting adhesive 5L is thermally cured by heating, the thermosetting adhesive cured portion 5 is formed.
Thus, Step S5 is completed, and the first component 2 and the second component 3 are bonded and fixed by the ultraviolet curing adhesive curing unit 4 and the thermosetting adhesive curing unit 5.
Thus, the method for adhesively fixing the optical assembly of the present embodiment is completed.
When the holding jig 10 is released, the optical assembly 1 shown in FIG. 1A is manufactured.

According to the bonding and fixing method of the optical assembly of the present embodiment, when the ultraviolet curing adhesive 4L is cured, the first component 2 and the second component 3 are held by the holding jigs 9 and 10, respectively. , UV light L is irradiated, and the ultraviolet curing adhesive 4L is cured.
Therefore, even if curing shrinkage of the ultraviolet curing adhesive 4L occurs while the ultraviolet curing adhesive 4L is cured and the ultraviolet curing adhesive cured portion 4 is formed, the holding position by the holding jigs 9 and 10 does not change. The relative positions of the first part 2 and the second part 3 are the same as at the end of the position adjustment.
In this embodiment, after the ultraviolet curing adhesive curing portion 4 is formed and the relative position of the first part 2 and the second part 3 is fixed at the adjusted position, the thermosetting adhesive 5L is cured to perform thermosetting bonding. The agent curing portion 5 is formed.

When heating is performed in a state where the first part 2 and the second part 3 are held by the holding jigs 9 and 10 in order to cure the thermosetting adhesive 5L, a system including the holding jigs 9 and 10 is Thermal expansion. Since the first component 2, the second component 3, and the holding jigs 9 and 10 have different coefficients of thermal expansion, they are heated to cause anisotropic thermal expansion as a whole.
The first component 2 and the second component 3 receive a relative external force from the holding jigs 9 and 10 and are deformed, and the thermosetting adhesive cured portion 5 is formed in a state of being deviated from the relative position at the end of the adjustment. .
Therefore, the first component 2 and the second component 3 are fixed by the thermosetting adhesive curing unit 5 in a positional relationship different from that at the end of the adjustment.
Therefore, even if the holding jigs 9 and 10 are released after the heating is stopped, the relative position of the first part 2 and the second part 3 may deviate from the position at the end of the adjustment, or the first part 2 and the second 2 part 3 is distorted.

On the other hand, in the present embodiment, when the heating is performed, since the holding release of the holding jig 9 is performed, the first part 2 and the second part 3 bonded by the ultraviolet curing adhesive curing portion 4 Among them, only the second part 3 is held by the holding jig 10.
Even if the first part 2 and the second part 3 thermally expand due to heating, the first part 2 is not restrained by the holding jig 9. For this reason, if heating is complete | finished and temperature falls, the 1st components 2 will return to the state of the relative position before heating with respect to the 2nd components 3. FIG.
In particular, in the present embodiment, the ultraviolet curing adhesive 4L and the thermosetting adhesive 5L are applied close to the axially adjacent position. For this reason, even if the thermal expansion coefficient of the cylindrical portion 3a is different from the thermal expansion coefficient of the first component 2, the thermal expansion between the ultraviolet curing adhesive curing portion 4 and the thermosetting adhesive curing portion 5 The difference in quantity is minimal. Thereby, the positional offset by the difference of the thermal expansion coefficient of the 1st component 2 and the 2nd component 3 is suppressed.

In this way, in the optical assembly 1 to which the first component 2 and the second component 3 are adhesively fixed, the relative position at the time of position adjustment is maintained, so the first component 2 and the second component 3 have high accuracy with each other. It is fixed. Therefore, the relative position of the optical components included in the optical assembly 1 is adjusted with high accuracy.
Further, the optical assembly 1 is adhesively fixed by the ultraviolet curing adhesive curing portion 4 and the thermosetting adhesive curing portion 5. Since the thermosetting adhesive cured portion 5 has higher adhesive strength than the ultraviolet curable adhesive cured portion 4, the optical assembly 1 is bonded with high strength.
According to the bonding and fixing method of the optical assembly of the present embodiment and the optical assembly, each assembly component of the optical assembly can be fixed with high strength and high accuracy.

Second Embodiment
An optical assembly according to a second embodiment of the present invention will be described.
FIG. 5A is a schematic cross-sectional view showing an example of the optical assembly according to the second embodiment of the present invention. FIG. 5B is a cross-sectional view taken along the line CC in FIG. 5A. FIG. 6 is a schematic cross-sectional view showing an example of a first assembly component used for the optical assembly of the second embodiment of the present invention. FIG. 7 is a schematic cross-sectional view showing an example of a second assembly component used for the optical assembly of the second embodiment of the present invention.

As shown in FIGS. 5A and 5B, the optical assembly 11 of this embodiment is a first component 12 (in place of the first component 2 and the second component 3 of the optical assembly 1 in the first embodiment). It comprises an assembly component, a first assembly component), a second part 13 (an assembly component, a second assembly component). The first component 12 and the second component 13 are adhered and fixed to each other by the ultraviolet curing adhesive curing portion 4 and the thermosetting adhesive curing portion 5 as in the first embodiment except that the bonding position is different. .
Hereinafter, differences from the first embodiment will be mainly described.

As shown in FIG. 6, the first component 12 includes a first lens 15 (optical component) and a first lens frame 14.
The first lens 15 is a lens that constitutes an optical system that exhibits appropriate optical performance together with a second lens 17 of a second component 13 described later.
The lens configuration of the first lens 15 can adopt an appropriate lens configuration for realizing the optical performance necessary for the optical apparatus using the optical assembly 11.
For example, although the example in case the 1st lens 15 is a single lens is shown in figure by FIG. 6, the 1st lens 15 may be comprised by the lens group which consists of several lenses.
Although the biconvex lens is illustrated in FIG. 6 as the first lens 15, this is an example, and the first lens 15 is not limited to the positive lens. For example, when the first lens 15 is a single lens, the first lens 15 may be a convex lens such as a plano-convex lens or a positive meniscus lens, or may be various concave lenses. For example, when the first lens 15 is composed of a lens group, appropriate types of lenses may be combined as needed.

The material of the first lens 15 is not particularly limited. For example, the first lens 15 may be a glass lens or a resin lens.

The first lens frame 14 is a frame member which is formed in a cylindrical shape as a whole and holds the first lens 15 coaxially on the central axis O14.
The first lens frame 14 includes a disc portion 14a, a first cylindrical portion 14b, and a second cylindrical portion 14c.

A through hole 14 e having an inner diameter smaller than the outer diameter of the first lens 15 penetrates through the central portion of the disc portion 14 a.
The first cylindrical portion 14b is a cylindrical portion that extends coaxially with the central axis O14 from one surface of the disc portion 14a. The inner diameter of the first tubular portion 14 b is larger than the outer diameter of the first lens 15.
Inside the first cylindrical portion 14b, the disc portion 14a extended to the through hole 14e constitutes a lens receiving portion 14f for receiving the first lens 15.
A second adhesive surface 14C to which the same thermosetting adhesive cured portion 5 as in the first embodiment is adhered is formed on the outer peripheral surface on the tip end side in the projecting direction of the first cylindrical portion 14b.
The configuration of the second adhesive surface 14C is the same as that of the second adhesive surface 2C in the first embodiment.

The second cylindrical portion 14c is a cylindrical portion which protrudes from the outer peripheral portion of the disk portion 14a in the same direction as the first cylindrical portion 14b and extends coaxially with the central axis O14.
The protruding height of the second cylindrical portion 14c from the disc portion 14a is lower than the protruding height of the first cylindrical portion 14b from the disc portion 14a.
An inner circumferential surface on the tip end side in the protrusion direction of the second cylindrical portion 14c and a tip surface 14d in the protrusion direction are in close contact with the same ultraviolet curable adhesive cured portion 4 as in the first embodiment. An adhesive surface 14B is formed.
The configuration of the first bonding surface 14B is the same as that of the first bonding surface 2B in the first embodiment.
The first adhesive surface 14B is located radially outward of the second adhesive surface 14C.

A clearance is formed in the radial direction between the first cylindrical portion 14b and the second cylindrical portion 14c, and a cylindrical portion 16a of the second lens frame 16 described later is inserted with a clearance in the radial direction. It is possible.
A holding portion 14A similar to the holding portion 2A in the first component 2 of the first embodiment is formed on the outer peripheral surface of the second cylindrical portion 14c.

The material of the first lens frame 14 is not particularly limited as long as it can be adhered by the same ultraviolet curing adhesive 4L and thermosetting adhesive 5L as in the first embodiment. For example, the material of the first lens frame 14 may be metal or resin.
However, the material of the first lens frame 14 is more preferably metal. When the material of the first lens frame 14 is metal, the thermal conductivity is improved, so that the heating time or the amount of heat necessary for thermosetting the thermosetting adhesive 5L can be reduced.

In the first component 12, the first lens 15 is inserted into the first cylindrical portion 14 b of the first lens frame 14.
The first lens 15 is adhesively fixed to the inside of the first cylindrical portion 14 b via the adhesive cured portion 12 a in a state where the first lens 15 is positioned by the lens receiving portion 14 f of the first lens frame 14.
The adhesive curing portion 12a may be formed over the entire circumference between the outer peripheral portion of the first lens 15 and the lens receiving portion 14f, or may be formed at a plurality of places separated in the circumferential direction.
The material of the adhesive cured portion 12a is not particularly limited. The adhesive curing portion 12a can be formed by curing an adhesive such as an ultraviolet curing adhesive or a thermosetting adhesive, for example.

As shown in FIG. 7, the second component 13 includes a second lens 17 (optical component) and a second lens frame 16.
The second lens 17 together with the first lens 15 of the first component 12 is a lens that constitutes an optical system that exhibits appropriate optical performance.
The lens configuration of the second lens 17 can adopt an appropriate lens configuration for achieving the optical performance necessary for the optical device using the optical assembly 11.
For example, although the example in the case of a single lens is illustrated in FIG. 7, the 2nd lens 17 may be comprised by the lens group which consists of several lenses.
The schematic illustration in FIG. 7 is an example, and the second lens 17 can adopt various lens configurations as required, as the first lens 15 does.

The material of the second lens 17 is not particularly limited. For example, the second lens 17 may be a glass lens or a resin lens.

The second lens frame 16 is a frame member which is formed in a cylindrical shape as a whole and holds the second lens 17 coaxially on the central axis O16.
The second lens frame 16 includes a cylindrical portion 16a, a flange portion 16b, and a lens receiving portion 16f.

The cylindrical portion 16 a is a cylindrical portion that accommodates the second lens 17, and has a shape that can be inserted between the first cylindrical portion 14 b and the second cylindrical portion 14 c of the first lens frame 14.
The inner diameter of the cylindrical portion 16 a is larger than the outer diameter of the second lens 17 and the outer diameter of the first cylindrical portion 14 b of the first lens frame 14.
The outer diameter of the cylindrical portion 16 a is smaller than the inner diameter of the second cylindrical portion 14 c of the first lens frame 14.
The dimensional difference between the inner diameter of the cylindrical portion 16a and the outer diameter of the first cylindrical portion 14b of the first lens frame 14, and the outer diameter of the cylindrical portion 16a and the inner diameter of the second cylindrical portion 14c of the first lens frame 14. In both cases, the amount of positional adjustment between the first component 12 and the second component 13 in the radial direction is larger than that of the second component 13.

The flange portion 16 b protrudes radially outward from an outer peripheral surface 16 d at one end of the cylindrical portion 16 a over the entire circumference. In the present embodiment, the outer diameter of the flange portion 16 b is equal to the outer diameter of the second cylindrical portion 14 c of the first lens frame 14.
Between the outer peripheral surface 16d and the flange portion 16b, a step portion 16c formed of a plane orthogonal to the central axis O16 of the cylindrical portion 16a is formed.
A holding portion 16A similar to the holding portion 3A of the second component 3 in the first embodiment is formed on the outer peripheral surface of the flange portion 16b.
The lens receiving portion 16f is a plate-like portion which is extended radially inward in the cylindrical portion 16a. In the present embodiment, the lens receiving portion 16 f is formed at a position near the flange portion 16 b in the axial direction of the cylindrical portion 16 a.
A through hole 16e having an inner diameter smaller than the outer diameter of the second lens 17 penetrates through the central portion of the lens receiving portion 16f so as to be coaxial with the central axis O16.

A second adhesive surface 16C to which the same thermosetting adhesive cured portion 5 as in the first embodiment is adhered is formed on the inner peripheral surface on the tip end side of the cylindrical portion 16a in the projecting direction.
The configuration of the second adhesive surface 16C is the same as that of the second adhesive surface 3C in the first embodiment.
However, as shown in FIG. 5A, the second bonding surface 16C inserts the cylindrical portion 16a between the first cylindrical portion 14b and the second cylindrical portion 14c of the first lens frame 14 as described later. When adjusting the position of the first component 12, the first component 12 is formed at a portion that can face the second adhesive surface 14 </ b> C of the first lens frame 14.

As shown in FIG. 7, the ultraviolet curing adhesive cured portion 4 similar to that in the first embodiment is adhered to the outer peripheral surface on the proximal end side in the projecting direction of the cylindrical portion 16a and the step 16c. A first adhesive surface 16B is formed.
The configuration of the first adhesive surface 16B is the same as that of the first adhesive surface 3B in the first embodiment.
The first adhesive surface 16B is located radially outward of the second adhesive surface 16C. The position in the axial direction of the first bonding surface 16B is not particularly limited, but in the present embodiment, as an example, the first bonding surface 16B is formed at a position overlapping the formation range of the second bonding surface 16C.

The material of the second lens frame 16 is not particularly limited as long as it can be adhered by the same ultraviolet curing adhesive 4L and thermosetting adhesive 5L as in the first embodiment. For example, the material of the second lens frame 16 may be metal or resin.
However, the material of the second lens frame 16 is more preferably metal. When the material of the second lens frame 16 is metal, the thermal conductivity is improved, so that the heating time or the amount of heat required to thermally cure the thermosetting adhesive 5L is reduced.
Further, the material of the second lens frame 16 may be a material close to the thermal expansion coefficient of the first lens frame 14. Furthermore, as a material of the second lens frame 16, a material having a thermal expansion coefficient equal to that of the first lens frame 14 may be used.

In the second component 13, the second lens 17 is inserted into the cylindrical portion 16 a of the second lens frame 16.
The second lens 17 is adhesively fixed to the inside of the cylindrical portion 16 a via the adhesive cured portion 13 a in a state where the second lens 17 is positioned by the lens receiving portion 16 f of the second lens frame 16.
The adhesive curing portion 13a may be formed over the entire circumference between the outer peripheral portion of the second lens 17 and the lens receiving portion 16f, or may be formed at a plurality of places separated in the circumferential direction.
The material of the adhesive cured portion 13a is not particularly limited. The adhesive curing portion 13a can be formed, for example, by curing an adhesive such as an ultraviolet curing adhesive or a thermosetting adhesive.

As shown to FIG. 5A and FIG. 5B, the ultraviolet curing adhesive hardening part 4 in this embodiment is between the 1st components 12 and the 1st cylindrical part 14b in the 1st components 12, and the 2nd cylindrical part 14c. Is formed by curing the ultraviolet curing adhesive filled between the second part 13 into which the cylindrical portion 16a is inserted.
In the present embodiment, the ultraviolet curing adhesive curing portion 4 is formed by curing the ultraviolet curing adhesive filled between the first bonding surface 14B and the first bonding surface 16B. Thus, the region between the first adhesive surface 14B and the first adhesive surface 16B constitutes a first region between the first assembly component and the second assembly component.
The ultraviolet curing adhesive curing portion 4 may be formed over the entire circumference between the first bonding surface 14B and the first bonding surface 16B, or may be formed at a plurality of places separated in the circumferential direction. In the present embodiment, as an example, an example in which it is formed over the entire circumference will be described (see FIG. 5B).

The thermosetting adhesive curing portion 5 in the present embodiment has a cylindrical portion 16 a inserted between the first component 12 and the first cylindrical portion 14 b and the second cylindrical portion 14 c of the first component 12. The thermosetting adhesive filled between the two parts 13 is formed by curing.
In the present embodiment, the thermosetting adhesive cured portion 5 is formed by curing the thermosetting adhesive filled between the second adhesive surface 14C and the second adhesive surface 16C. Thus, the region between the second adhesive surface 14C and the second adhesive surface 16C constitutes a second region between the first assembly component and the second assembly component.
The thermosetting adhesive cured portion 5 may be formed over the entire circumference between the second adhesive surface 14C and the second adhesive surface 16C, or may be formed at a plurality of places separated in the circumferential direction. In the present embodiment, as an example, an example will be described in which it is formed over the entire circumference (see FIG. 5B).

Next, a method of manufacturing the optical assembly 11 will be described focusing on the method of bonding and fixing the optical assembly of the present embodiment.
FIG. 8 is a process diagram for curing an ultraviolet curing adhesive in the method for bonding and fixing an optical assembly according to the second embodiment of the present invention. FIG. 9 is a process diagram for curing a thermosetting adhesive in the method for bonding and fixing an optical assembly according to the second embodiment of the present invention.

After the optical assembly 11 manufactures the first component 12 and the second component 13, the optical assembly according to the first embodiment, the flow of which is shown in FIG. Manufactured by adhesively fixing by the adhesive fixing method of
Hereinafter, differences from the first embodiment will be mainly described.

Step S1 in the present embodiment is that the parts to be fixed to each other are the first part 12 and the second part 13 and, correspondingly, the portion where the ultraviolet curing adhesive 4L and the thermosetting adhesive 5L intervene The different point is different from step S1 in the first embodiment.
This step can be performed, for example, as follows.
First, the holding portion 14A of the first component 12 is held by the holding jig 9, and the holding portion 16A of the second component 13 is held by the holding jig 10.
Next, for example, the ultraviolet curing adhesive 4L is applied to the first adhesive surface 16B, and the thermosetting adhesive 5L is applied to the second adhesive surface 14C.
Next, as shown in FIG. 8, the holding jigs 9 and 10 are moved relative to each other, and the first cylindrical portion 14 b and the second cylindrical portion 14 c of the first component 12 held by the holding jig 9. The cylindrical portion 16a of the second part 13 is inserted between them.
When the first component 12 is inserted to a position where the second bonding surface 14C faces the second bonding surface 16C of the second component 13, the relative movement of the holding jigs 9 and 10 is stopped. At this time, the front end surface 14 d of the first component 12 contacts the thermosetting adhesive 5 L applied to the first adhesive surface 16 B of the second component 13.
As a result, the thermosetting adhesive 5L is filled between the second adhesive surface 14C and the second adhesive surface 16C. The ultraviolet curing adhesive 4L is filled between the first adhesive surface 14B and the first adhesive surface 16B.
Above, step S1 in this embodiment is completed.

However, the above operation is an example of the operation of step S1 in the present embodiment. In step S1 in the present embodiment, an operation different from the above may be performed.
For example, the thermosetting adhesive 5L may be applied to the second adhesive surface 16C instead of the second adhesive surface 14C.
For example, after the cylindrical portion 16a of the second part 13 is inserted between the first cylindrical portion 14b and the second cylindrical portion 14c of the first part 12 held by the holding jig 9, ultraviolet curing is performed. The adhesive 4L and the thermosetting adhesive 5L may be filled. In order to fill the thermosetting adhesive 5L, for example, an adhesive introducing hole (not shown) is provided at an appropriate position of the first lens frame 14 or the second lens frame 16 and the adhesive introducing hole is formed using a syringe or the like. The thermosetting adhesive 5L may be filled through the above.

After step S1, step S2 in the present embodiment is performed. In this step, the relative positions of the first part 12 and the second part 13 are adjusted in the same manner as step S2 in the first embodiment.
Since the cylindrical portion 16a of the second part 13 is in a state of being fitted with a gap between the first cylindrical part 14b and the second cylindrical part 14c of the first part 12, the relative position is within the range of the clearance. It is movable.
The adjustment in this step can also be performed in the same manner as in the first embodiment. In particular, in the present embodiment, since the first component 12 and the second component 13 respectively include the first lens 15 and the second lens frame 16, as an example of adjustment, for example, optical axis adjustment, eccentricity adjustment, lens interval adjustment An example is given.

After step S2, step S3 in the present embodiment is performed. In this step, as shown in FIG. 8, in a state in which the first part 12 and the second part 13 are held at the adjusted positions, in the same manner as step S3 in the first embodiment, the ultraviolet curing adhesive 4L Cure.
When the ultraviolet curing adhesive 4L is UV cured by the UV light L, the UV curing adhesive cured portion 4 is formed.
As a result, the first part 12 and the second part 13 are fixed to each other.

After step S3, step S4 in the present embodiment is performed. In this step, one of the first part 12 and the second part 13 is held, and the other is held and released.
In the present embodiment, the holding portions 14A and 16A are formed on the outer peripheral portions of the first component 12 and the second component 13 which are the outermost surfaces of the optical assembly 11, respectively. For this reason, the holding portions 14A and 16A are holding portions formed independently at portions that can be held and released.
That is, holding one of the holding portions 14A and 16A does not prevent the other holding release.
Therefore, it is possible to hold and release one of the first part 12 and the second part 13 while holding the other.
In this embodiment, as shown in FIG. 9, as one example, the holding of the holding portion 14A by the holding jig 9 is released.

After step S4, step S5 in the present embodiment is performed. In this step, in a state in which one of the first component 12 and the second component 13 is held, the thermosetting adhesive 5L is cured in the same manner as step S4 in the first embodiment.
For example, as shown in FIG. 9, warm air is blown to the first component 12 and the second component 13 from the outside in the radial direction corresponding to the portion to which the thermosetting adhesive 5L is applied, and the thermosetting adhesive 5L is filled. It may be possible to heat locally the vicinity of the site.
Alternatively, while holding the second part 13 by the holding jig 10, the second part 13 may be carried into the heating tank to heat the first part 2 and the second part 3 entirely.
When the thermosetting adhesive 5L is thermally cured by heating, the thermosetting adhesive cured portion 5 is formed.
Thus, Step S5 is completed, and the first component 12 and the second component 13 are bonded and fixed by the ultraviolet curing adhesive curing unit 4 and the thermosetting adhesive curing unit 5.
Thus, the method for adhesively fixing the optical assembly of the present embodiment is completed.
When the holding jig 10 is released, the optical assembly 11 shown in FIG. 5A is manufactured.

The bonding and fixing method of the optical assembly according to the present embodiment is different from the above in that the shapes of the members to be bonded and fixed are different, and the regions filled with the ultraviolet curing adhesive 4L and the thermosetting adhesive 5L are different accordingly. It is the same as the adhesive fixing method of the optical assembly of one embodiment.
For this reason, as in the first embodiment, the first component 12 and the second component 13 which are the assembly components of the optical assembly 11 can be fixed with high strength and high accuracy.

In particular, according to the optical assembly 11 of the present embodiment, the thermosetting adhesive 5L is thermally cured in a state in which the thermosetting adhesive 5L is filled in a range overlapping in the axial direction inward in the radial direction with respect to the ultraviolet curing adhesive cured portion 4 Ru. Therefore, even if the first lens frame 14 and the second lens frame 16 are thermally expanded in the axial direction by heating, the ultraviolet curing adhesive cured portion 4 and the thermosetting adhesive 5L on the back surface side are substantially the same in the axial direction. It is a position. Therefore, positional deviation in thermal expansion in the axial direction does not easily occur.
On the other hand, in the radial direction, since the first lens frame 14 and the second lens frame 16 are respectively cylindrical and coaxially disposed, the relative positional deviation due to the thermal expansion of each is reduced. In particular, if the thermal expansion coefficients of the first lens frame 14 and the second lens frame 16 are substantially the same, the thermal expansion is also substantially isotropic.

Third Embodiment
An optical assembly of a third embodiment of the present invention will be described.
FIG. 10 is a schematic cross-sectional view showing an example of an optical assembly according to the third embodiment of the present invention.

As shown in FIG. 10, the optical assembly 21 of the present embodiment is a first component 22 (an assembly component, a first, instead of the first component 12 of the optical assembly 11 of the second embodiment). An assembly component), and is configured by adding a third part 23 (an assembly component, a second assembly component).
The first component 22 and the second component 13 are adhered and fixed to each other by the ultraviolet curing adhesive curing portion 4A and the thermosetting adhesive curing portion 5A in the same manner as in the second embodiment.
The third component 23 is adhered and fixed to each other by the ultraviolet curing adhesive curing portion 4B and the thermosetting adhesive curing portion 5B in the same manner as in the second embodiment.
The ultraviolet curing adhesive curing portions 4A and 4B are formed by curing the same UV curing adhesive 4L in the second embodiment.
The thermosetting adhesive cured portion 5A, 5B is formed by curing the same thermosetting adhesive 5L as in the second embodiment.
Hereinafter, differences from the second embodiment will be mainly described.

The first part 22 includes a first lens frame 24 instead of the first lens frame 14 of the first part 12 in the second embodiment.
The first lens frame 24 is configured by adding a third cylindrical portion 24 b and a fourth cylindrical portion 24 c to the first lens frame 14.

The third cylindrical portion 24b is a cylindrical portion of the disk portion 14a that extends coaxially with the central axis O14 from the surface opposite to the surface on which the first cylindrical portion 14b is formed. The inner diameter of the third cylindrical portion 24 b is larger than the inner diameter of the through hole 14 e and smaller than the outer diameter of the third lens 27 described later.
A fourth bonding surface 24C to which the thermosetting adhesive cured portion 5B is in close contact is formed on the outer peripheral surface on the tip end side of the third cylindrical portion 24b in the protruding direction.
The configuration of the fourth bonding surface 24C is the same as that of the second bonding surface 14C.

The fourth cylindrical portion 24c is a cylinder that protrudes in the same direction as the third cylindrical portion 24b from the disc portion 14a radially outward of the third cylindrical portion 24b and extends coaxially with the central axis O14. Part of the
The outer diameter of the fourth cylindrical portion 24c may be different from that of the second cylindrical portion 14c, but in the example shown in FIG. 10, it is equal to the outer diameter of the second cylindrical portion 14c.
A holding portion 24A similar to the holding portion 14A of the first component 12 in the second embodiment is formed on the outer peripheral surface of the second cylindrical portion 14c and the fourth cylindrical portion 24c.

The protruding height of the fourth cylindrical portion 24c from the disc portion 14a is lower than the protruding height of the third cylindrical portion 24b from the disc portion 14a.
A third bonding surface 24B is formed on the inner peripheral surface on the tip end side in the protrusion direction of the fourth cylindrical portion 24c and on the tip end surface 24d in the protrusion direction, to which the ultraviolet curing adhesive cured portion 4B adheres.
The configuration of the third bonding surface 24B is the same as that of the first bonding surface 14B.
The third adhesive surface 24B is located radially outward of the fourth adhesive surface 24C of the fourth cylindrical portion 24c.

A gap is formed in the radial direction between the third cylindrical portion 24b and the fourth cylindrical portion 24c, and the cylindrical portion 26a of the third lens frame 26, which will be described later, is inserted with a gap in the radial direction. It is possible.
The material of the first lens frame 24 is the same as that of the first lens frame 14 in the second embodiment.

The third component 23 includes a third lens 27 (optical component) and a third lens frame 26.
The third lens 27, together with the first lens 15 of the first component 12 and the second lens 17 of the second component 13, is a lens that constitutes an optical system that exhibits appropriate optical performance.
The lens configuration of the third lens 27 can adopt an appropriate lens or lens group for achieving the optical performance required for the optical apparatus using the optical assembly 21. The schematic illustration in FIG. 10 is an example, and the third lens 27 may adopt various lens configurations and lens materials as necessary, as the first lens 15 and the second lens 17.

The third lens frame 26 is a frame member which is formed in a cylindrical shape as a whole and holds the third lens 27 coaxially on the central axis O24.
The third lens frame 26 corresponds to the cylindrical portion 16a, the flange portion 16b, and the lens receiving portion 16f of the second lens frame 16, respectively, the cylindrical portion 26a, the flange portion 26b, and the lens receiving portion 26f is provided.
The material of the third lens frame 26 may be different from that of the second lens frame 16, but in the present embodiment, the material is the same as that of the second lens frame 16 as an example.

The cylindrical portion 26 a is a cylindrical portion that accommodates the third lens 27, and has a shape that can be inserted between the third cylindrical portion 24 b and the fourth cylindrical portion 24 c of the first lens frame 24.
The inner diameter of the cylindrical portion 26 a is larger than the outer diameter of the third lens 27 and the outer diameter of the third cylindrical portion 24 b of the first lens frame 24.
The outer diameter of the cylindrical portion 26 a is smaller than the inner diameter of the fourth cylindrical portion 24 c of the first lens frame 24.
The dimensional difference between the inner diameter of the cylindrical portion 26a and the outer diameter of the third cylindrical portion 24b of the first lens frame 24, and the outer diameter of the cylindrical portion 26a and the inner diameter of the fourth cylindrical portion 24c of the first lens frame 24. In both cases, the amount of positional adjustment between the first component 22 and the third component 23 in the radial direction is larger than that of the second component 22.

The flange portion 26 b protrudes radially outward from the outer peripheral surface 26 d at one end of the cylindrical portion 26 a over the entire circumference. In the present embodiment, the outer diameter of the flange portion 26 b is equal to the outer diameter of the fourth cylindrical portion 24 c of the first lens frame 24.
Between the outer peripheral surface 26d and the flange portion 26b, a stepped portion 26c is formed which is a plane orthogonal to the central axis O26 of the cylindrical portion 26a.
A holding portion 26A similar to the holding portion 16A of the second component 13 is formed on the outer peripheral surface of the flange portion 26b.
However, while the holding portion 16A is a portion held by the holding jig 10, the holding portion 26A is different in that the holding portion 20A is held by the holding jig 20 described later.

The lens receiving portion 26f is a plate-like portion that extends radially inward from the inner peripheral surface of one end portion similar to the flange portion 26b formed in the cylindrical portion 26a.
A through hole 26e having an inner diameter smaller than the outer diameter of the third lens 27 penetrates through the center of the lens receiving portion 26f so as to be coaxial with the central axis O26.

A second bonding surface 26C to which the thermosetting adhesive cured portion 5B is closely attached is formed on the inner peripheral surface on the tip end side of the cylindrical portion 26a in the protruding direction.
The configuration of the second adhesive surface 26C is similar to that of the second adhesive surface 16C.
However, as described later, the second adhesive surface 26C inserts the cylindrical portion 26a between the third cylindrical portion 24b and the fourth cylindrical portion 24c of the first lens frame 24 to position the third component 23 When adjusting, it is formed in a portion that can face the fourth adhesive surface 24C of the first lens frame 24.

On the outer peripheral surface on the proximal end side in the protruding direction of the cylindrical portion 26a, and on the step portion 26c, a first bonding surface 26B to which the ultraviolet curing adhesive cured portion 4B is adhered is formed.
The configuration of the first adhesive surface 26B is similar to that of the first adhesive surface 16B.
The first adhesive surface 26B is located radially outward of the second adhesive surface 26C. The position in the axial direction of the first bonding surface 26B is not particularly limited, but in the present embodiment, as an example, the first bonding surface 26B is formed at a position overlapping with the formation range of the second bonding surface 26C.

In the third component 23, the third lens 27 is inserted into the cylindrical portion 26 a of the third lens frame 26.
The third lens 27 is adhesively fixed to the inside of the cylindrical portion 26a via the adhesive curing portion 13a similar to the example in the second component 13 in a state where the third lens 27 is positioned by the lens receiving portion 26f of the third lens frame 26. ing.

The UV curing adhesive curing portion 4A is formed by curing the UV curing adhesive filled between the first bonding surface 14B and the first bonding surface 16B, as in the second embodiment.
The ultraviolet curing adhesive curing portion 4B includes a third part 23 in which a cylindrical portion 26a is inserted between the first part 22 and the third cylindrical part 24b and the fourth cylindrical part 24c of the first part 22. Are formed by curing of the UV curable adhesive filled in between.
The ultraviolet curing adhesive curing portion 4B may be formed over the entire circumference as in the case of the ultraviolet curing adhesive curing portion 4A, or may be formed at a plurality of places separated in the circumferential direction.
The ultraviolet curing adhesive curing portion 4B is formed by curing of the ultraviolet curing adhesive filled between the third bonding surface 24B and the first bonding surface 26B. Thus, the region between the third bonding surface 24B and the first bonding surface 26B constitutes a first region between the first assembly component and the second assembly component.

The thermosetting adhesive cured portion 5A is formed by curing of the thermosetting adhesive filled between the second adhesive surface 14C and the second adhesive surface 16C, as in the second embodiment.
The thermosetting adhesive curing portion 5B includes a third component 23 in which a cylindrical portion 26a is inserted between the first component 22 and the third cylindrical portion 24b and the fourth cylindrical portion 24c of the first component 22. Is formed by curing the thermosetting adhesive filled in between.
Similarly to the thermosetting adhesive cured portion 5A, the thermosetting adhesive cured portion 5B may be formed over the entire circumference, or may be formed at a plurality of places separated in the circumferential direction.
The thermosetting adhesive cured portion 5B is formed by curing the thermosetting adhesive filled between the fourth adhesive surface 24C and the second adhesive surface 26C. Thus, the region between the fourth bonding surface 24C and the second bonding surface 26C constitutes a second region between the first assembly component and the second assembly component.

Next, a method of manufacturing the optical assembly 21 will be described focusing on the method of bonding and fixing the optical assembly of the present embodiment.
FIG. 11 is a process diagram for curing an ultraviolet curing adhesive in the method for bonding and fixing an optical assembly according to the third embodiment of the present invention. FIG. 12 is a process diagram for curing a thermosetting adhesive in the method for bonding and fixing an optical assembly according to the third embodiment of the present invention.

After the optical assembly 1 manufactures the first component 22, the second component 13, and the third component 23, the flow of the first component 22, the second component 13, and the third component 23 is shown in FIG. It manufactures by adhesively fixing by the adhesive fixing method of the optical assembly of said 2nd embodiment.
Hereinafter, differences from the second embodiment will be mainly described.

Step S1 in the present embodiment is that the parts to be fixed to each other are the three parts of the first part 22, the second part 13 and the third part 23, and correspondingly, the ultraviolet curing adhesive 4L and the heat curing The point of difference in the portion where the adhesive 5L is interposed is different from step S1 in the second embodiment.
In this step, similarly to the second embodiment, the ultraviolet curing adhesive 4L is interposed between the first adhesive surface 14B and the first adhesive surface 16B, and the second adhesive surface 14C and the second adhesive surface 16C. The second component 13 is assembled to the first component 22 with the thermosetting adhesive 5 L interposed therebetween.
In the present embodiment, the third part 23 has substantially the same configuration as the second part 13, and the third cylindrical part 24b and the fourth cylindrical part 24c can insert the cylindrical part 26a into the first part 22. Equipped with Therefore, as in the second embodiment, the ultraviolet curing adhesive 4L is interposed between the third adhesive surface 24B and the first adhesive surface 26B, and between the fourth adhesive surface 24C and the second adhesive surface 26C. The third component 23 can be assembled to the first component 22 by interposing the thermosetting adhesive 5 L on each of the first component 22 and the second component 22.

After step S1, step S2 in the present embodiment is performed. In this step, the relative positions of the first component 22, the second component 13, and the third component 23 are adjusted in the same manner as step S2 in the second embodiment.
Since the first component 22 and the second component 13 are in a state of being fitted with a gap as in the second embodiment, relative movement is possible within the range of the gap.
Similarly, since the first component 22 and the third component 23 are also in a state of being engaged with each other with a gap therebetween, relative movement is possible within the range of the gap.
In this step, as shown in FIG. 11, the holding part 24A of the first part 22 is held by the holding jig 9, the holding part 16A of the second part 13 is held by the holding jig 10, and the holding part 26A of the third part 23 is held. The holding jig 20 holds it.
As the holding jig 20, the same configuration as the holding jigs 9 and 10 can be adopted.
The adjustment in this step is performed by fixing one of the holding jigs 9, 10, 20 and moving the other as needed.

After step S2, step S3 in the present embodiment is performed. In this step, as shown in FIG. 11, in a state where the first part 22, the second part 13 and the third part 23 are held at the adjusted positions, in the same manner as step S3 in the second embodiment. , And cure the ultraviolet curing adhesive 4L.
When the UV curable adhesive 4L is UV cured by the UV light L, UV cured adhesive cured portions 4A and 4B are formed.
As a result, the second part 13 and the third part 23 are fixed to the first part 22.

After step S3, step S4 in the present embodiment is performed. In this step, one of the first part 22, the second part 13, and the third part 23 is held, and the other is held and released.
In the present embodiment, the holding portions 24A, 16A, and 26A are respectively formed on the outer peripheral portions of the first component 22, the second component 13, and the third component 23, which are the outermost surfaces of the optical assembly 21. For this reason, the holding portions 24A, 16A, 26A are holding portions formed independently at portions that can be held and released. That is, holding any one of the holding portions 24A, 16A, 26A does not prevent other holding release.
Therefore, it is possible to hold and release one of the first component 22, the second component 13, and the third component 23 while holding one of the first component 22, the second component 13, and the third component 23.
In the present embodiment, as shown in FIG. 12, as one example, the holding of the holding portions 16A, 26A by the holding jigs 10, 20 is released.

After step S4, step S5 in the present embodiment is performed. In this step, with one of the first part 22, the second part 13 and the third part 23 held, the thermosetting adhesive 5L is formed in the same manner as step S4 in the second embodiment. Cure.
For example, as shown in FIG. 11, while holding the first component 22 by the holding jig 9, the first component 22 is carried into the heating tank 30, and the first component 22, the second component 13, and the third component 23 are overall. It may be heated to
When the thermosetting adhesive 5L is thermally cured by heating, thermosetting adhesive cured portions 5A and 5B are formed.
Thus, Step S5 is completed, and the first component 22, the second component 13, and the third component 23 are adhesively fixed by the ultraviolet curing adhesive curing portions 4A and 4B and the thermosetting adhesive curing portions 5A and 5B. .
Thus, the method for adhesively fixing the optical assembly of the present embodiment is completed.
When the holding jig 9 is released, the optical assembly 21 shown in FIG. 10 is manufactured.

The present embodiment is different in that the number of assembly components of the optical assembly of the second embodiment is two while the number of assembly components is three.
Therefore, as in the second embodiment, the first component 22, the second component 13, and the third component 23, which are assembly components of the optical assembly 21, are fixed with high strength and high accuracy. be able to.

Fourth Embodiment
An optical assembly of a fourth embodiment of the present invention will be described.
FIG. 13 is a schematic cross-sectional view showing an example of an optical assembly according to the fourth embodiment of the present invention.

As shown in FIG. 13, an optical assembly 31 according to this embodiment is a first component 32 (assembly configuration instead of the first component 12 and the second component 13 of the optical assembly 11 in the second embodiment. A component, a first assembly component, an optical component), and a second component 33 (an assembly component, a second assembly component, an optical component). The first part 32 and the second part 33 are adhered and fixed to each other by the ultraviolet curing adhesive curing portion 4 and the thermosetting adhesive curing portion 5 as in the second embodiment.
Hereinafter, differences from the second embodiment will be mainly described.

The first component 32 includes a lens portion 32a, a flange portion 32b, a first cylindrical portion 32c, and a second cylindrical portion 32d.

The lens part 32a is a part which comprises a lens which has the same optical characteristic as the 1st lens 15 in the said 2nd Embodiment. However, even when the first lens 15 is composed of a lens group, the lens portion 32a is formed by a single lens having the same optical characteristic. Therefore, the lens surface configuration of the lens unit 32 a may be different from the lens surface configuration of the first lens 15.

The flange portion 32 b is a plate-like portion that extends radially outward from the outer peripheral portion of the lens portion 32 a. The outer diameter of the flange portion 32b is equal to the outer diameter of the disc portion 14a in the second embodiment.

The first cylindrical portion 32c is a cylindrical portion which is extended in the direction orthogonal to the flange portion 32b at the outer peripheral portion of the lens portion 32a. The central axis of the first tubular portion 32c is coaxial with the lens optical axis O32a of the lens portion 32a.
The inner diameter, the outer diameter, and the axial length of the first tubular portion 32c are the same as those of the first tubular portion 14b in the second embodiment. However, if the axial length of the first cylindrical portion 32c is equal to that of the first cylindrical portion 14b, the length to the tip surface of the first cylindrical portion 32c measured from the main surface of the lens portion 32a This means that the length of the first component 12 is equal to the length from the main surface of the first lens 15 to the tip surface of the first cylindrical portion 14b.

The second cylindrical portion 32 d is a cylindrical portion which is extended in the direction orthogonal to the flange portion 32 b at the outer peripheral portion of the flange portion 32 b. The central axis of the second cylindrical portion 32d is coaxial with the lens optical axis O32a of the lens portion 32a.
The inner diameter, the outer diameter, and the axial length of the second cylindrical portion 32 d are the same as those of the second cylindrical portion 14 c in the second embodiment. However, if the axial length of the second cylindrical portion 32d is equal to that of the second cylindrical portion 14c, the length measured from the main surface of the lens portion 32a to the tip end surface of the second cylindrical portion 32d This means that the length of the first component 12 is equal to the length from the main surface of the first lens 15 to the tip surface 14 d measured.

The first component 32 is integrally formed of resin or glass. The first part 32 may be formed by molding a resin or glass, or may be formed by removing a resin or glass base material.

With such a configuration, the first component 32 is a component in which the first lens 15 and the first lens frame 14 in the second embodiment are integrated.
Similar to the second cylindrical portion 14c in the second embodiment, a holding portion 14A and a first bonding surface 14B are formed in the second cylindrical portion 32d.
Similar to the second embodiment and the first cylindrical portion 14b, a second bonding surface 14C is formed on the first cylindrical portion 32c.

The second part 33 includes a lens portion 33a, a flange portion 33b, and a cylindrical portion 33c.

The lens portion 33a is a portion constituting a lens having the same optical characteristics as the second lens 17 in the second embodiment. However, even if the second lens 17 is formed of a lens group, the lens portion 33a is formed of a single lens having the same optical characteristics. Therefore, the lens surface configuration of the lens unit 33 a may be different from the lens surface configuration of the second lens 17.

The flange portion 33 b is a plate-like portion extended radially outward from the outer peripheral portion of the lens portion 33 a. The outer diameter of the flange portion 33b is equal to the outer diameter of the flange portion 16b in the second embodiment.

The cylindrical portion 33c is a cylindrical portion which is extended in the direction orthogonal to the flange portion 33b at the outer peripheral portion of the lens portion 33a. The central axis of the cylindrical portion 33c is coaxial with the lens optical axis O33a of the lens portion 33a.
The inner diameter, the outer diameter, and the axial length of the cylindrical portion 33c are the same as those of the cylindrical portion 16a in the second embodiment. However, that the axial length of the cylindrical portion 33c is equal to that of the cylindrical portion 16a means that the length from the main surface of the lens portion 33a to the tip end surface of the cylindrical portion 33c is the second part It means that it is equal to the length to the front end surface of the cylindrical part 16a measured in 13 from the main surface of the 2nd lens 17. FIG.

A stepped portion 33d similar to the stepped portion 16c in the second embodiment is formed between the flange portion 33b and the cylindrical portion 33c.

The second part 33 is integrally formed of resin or glass. The second part 33 may be formed by molding resin or glass, or may be formed by removing resin or glass base material.

With such a configuration, the second part 33 is a part in which the second lens 17 and the second lens frame 16 in the second embodiment are integrated.
Similar to the flange portion 16b in the second embodiment, a holding portion 16A is formed on the flange portion 33b.
The first bonding surface 16B is formed on the stepped portion 33d and the cylindrical portion 33c in the same manner as the stepped portion 16c and the cylindrical portion 16a in the second embodiment.
Similar to the cylindrical portion 16a in the second embodiment, a second adhesive surface 16C is formed in the cylindrical portion 33c.

The optical assembly 31 is manufactured by bonding and fixing the first component 32 and the second component 33 described above by the adhesive fixing method of the optical assembly similar to the second embodiment.
For this reason, as in the second embodiment, the optical assembly 31 fixes the first component 32 and the second component 33 which are the assembly components of the optical assembly 31 with high strength and high accuracy. Ru.
In particular, according to the optical assembly 31 of the present embodiment, since the first component 32 and the second component 33 are respectively configured as one component, the configuration is simplified, and the manufacturing cost can be reduced.

Fifth Embodiment
An optical assembly of a fifth embodiment of the present invention will be described.
FIG. 14 is a schematic cross-sectional view showing an example of an optical assembly according to the fifth embodiment of the present invention.

As shown in FIG. 14, an optical assembly 41 of this embodiment is different from the first component 32 of the optical assembly 31 of the fourth embodiment in a first component 42 (an assembly component, a first An assembly component, an optical component, and a third component 43 (an assembly component, a second assembly component, an optical component) are added.
The first component 42 is a component in which the first component 22 and the first lens 15 in the third embodiment are integrated.
The third component 43 is a component in which the third component 23 and the third lens 27 in the third embodiment are integrated.
The first part 42 and the second part 33 are adhered and fixed to each other by the ultraviolet curing adhesive curing portion 4A and the thermosetting adhesive curing portion 5A in the same manner as in the third embodiment.
The third component 43 is adhered and fixed to each other by the ultraviolet curing adhesive cured portion 4B and the thermosetting adhesive cured portion 5B in the same manner as in the third embodiment.
Hereinafter, differences from the third and fourth embodiments will be mainly described.

The first component 42 is configured by adding a third cylindrical portion 42 c and a fourth cylindrical portion 42 d to the first component 32 in the fourth embodiment.

The third cylindrical portion 42c is a cylindrical portion that is coaxially extended with the lens optical axis O32a from the surface opposite to the side where the first cylindrical portion 32c is formed in the outer peripheral portion of the lens portion 32a. .
The inner diameter, the outer diameter, and the axial length of the third cylindrical portion 42c are the same as those of the third cylindrical portion 24b in the third embodiment.
A fourth bonding surface 24C is formed on the third cylindrical portion 42c, as in the third embodiment.

The fourth cylindrical portion 42d is a cylinder that protrudes in the same direction as the third cylindrical portion 42c from the flange portion 32b radially outward of the third cylindrical portion 42c and extends coaxially with the lens optical axis O32a. Part of the
The inner diameter, the outer diameter, and the axial length of the fourth cylindrical portion 24c are the same as those of the fourth cylindrical portion 24c in the third embodiment.
Similar to the fourth cylindrical portion 24c in the third embodiment, the fourth cylindrical portion 42d and the second cylindrical portion 32d are formed with a holding portion 24A.
Similar to the fourth cylindrical portion 24c in the third embodiment, the fourth cylindrical portion 42d is formed with a third bonding surface 24B.

The first component 42 is integrally formed of resin or glass, similarly to the first component 32 in the fourth embodiment.

The third component 43 includes a lens portion 43a, a flange portion 43b, and a cylindrical portion 43c.

The lens portion 43a is a portion constituting a lens having the same optical characteristics as the third lens 27 in the third embodiment. However, even in the case where the third lens 27 is composed of a lens group, the lens portion 43a is formed by a single lens having the same optical characteristic. For this reason, the lens surface configuration of the lens unit 43a may be different from the lens surface configuration of the third lens 27.

The flange portion 43 b is a plate-like portion that extends outward in the radial direction from the outer peripheral portion of the lens portion 43 a. The outer diameter of the flange portion 43b is equal to the outer diameter of the flange portion 26b in the third embodiment.

The cylindrical portion 43c is a cylindrical portion which is extended in the direction orthogonal to the flange portion 43b at the outer peripheral portion of the lens portion 43a. The central axis of the cylindrical portion 43c is coaxial with the lens optical axis O43a of the lens portion 43a.
The inner diameter, the outer diameter, and the axial length of the cylindrical portion 43c are the same as those of the cylindrical portion 26a in the fourth embodiment. However, the axial length of the cylindrical portion 43c being equal to that of the cylindrical portion 26a means that the length from the main surface of the lens portion 43a to the tip end surface of the cylindrical portion 43c is the third part This means that the length 23 is equal to the length from the main surface of the third lens 27 to the tip surface of the cylindrical portion 26a.

A stepped portion 43d similar to the stepped portion 16c in the second embodiment is formed between the flange portion 43b and the cylindrical portion 43c.

Similar to the flange portion 26b in the third embodiment, a holding portion 16A is formed on the flange portion 43b.
The first bonding surface 26B is formed on the stepped portion 43d and the cylindrical portion 43c, similarly to the stepped portion 26c and the cylindrical portion 26a in the third embodiment.
The second bonding surface 26C is formed on the cylindrical portion 43c, similarly to the cylindrical portion 26a in the third embodiment.

The optical assembly 41 is manufactured by bonding and fixing the first component 42, the second component 33, and the third component 43 described above by the adhesive fixing method of the optical assembly similar to the third embodiment. Ru.
Therefore, as in the fourth embodiment, the optical assembly 41 has high strength for the first part 42, the second part 33, and the third part 43, which are assembly components of the optical assembly 41. And it is fixed with high precision.
In particular, according to the optical assembly 41 of the present embodiment, since the first component 42, the second component 33, and the third component 43 are each formed of one component, the configuration is simplified and the manufacturing cost can be reduced. it can.

In addition, although the example in the case where the number of assembly components in an optical assembly is 2 or 3 was demonstrated in description of said each embodiment, the number of objects of an assembly component is not limited to this. The number of assembly components in the optical assembly may be four or more.

In the description of each of the above embodiments, in the assembly components, the optical component such as the first lens 15 is adhesively fixed to the holding frame such as the first lens frame 14. However, when the assembly component comprises an assembly of an optical component and a non-optical component such as a holding frame, the method of fixing the optical component and the non-optical component is not limited to adhesive bonding.
For example, the optical component may be fixed using a member such as a pressing ring screwed to the non-optical component.
For example, the non-optical component and the optical component may be fixed to each other by providing the non-optical component and the optical component with engaging portions that engage with each other and engaging the respective engaging portions.
For example, the non-optical component and the optical component may be fixed to one another by pressing the optical component onto the non-optical component.
For example, the non-optical component and the optical component may be fixed to each other by deforming a part of the non-optical component and caulking the optical component.

In the description of the first embodiment, the example in which the ultraviolet curing adhesive curing portion and the thermosetting adhesive curing portion are formed at positions adjacent to each other in the axial direction of the assembly component is described.
In the description of the second to fifth embodiments, the ultraviolet curing adhesive curing portion and the thermosetting adhesive curing portion are substantially at the same position in the axial direction of the assembly component, and overlap in the radial direction. In particular, the UV-curable adhesive cured portion is formed on the outer peripheral side, and the thermosetting adhesive cured portion is formed on the inner peripheral side.
However, the positional relationship between the ultraviolet curing adhesive cured portion and the thermosetting adhesive cured portion is not limited to these positional relationships.
For example, the ultraviolet curing adhesive cured portion and the thermosetting adhesive cured portion may be formed on the same circumference.
For example, if it is a site | part which can irradiate UV light, an ultraviolet curing adhesive hardening part may be formed in an inner peripheral side, and a thermosetting adhesive hardening part may be formed in an outer peripheral side.

In the description of each of the above-described embodiments, the example in the case of forming the ultraviolet curing adhesive cured portion and the thermosetting adhesive cured portion respectively with the ultraviolet curing adhesive and the thermosetting adhesive has been described.
However, the UV curable adhesive curing portion and the thermosetting adhesive cured portion may be formed by one kind of adhesive capable of UV curing and thermal curing.

In the description of each of the above embodiments, an example in which the holding portion is formed by a smooth surface, a rough surface, and an uneven surface has been described, but the shape of the holding portion is not limited to these. The holding portion may have, for example, a protrusion, a recessed hole, a through hole, an appropriate engaging portion, and the like.

The preferred embodiments of the present invention have been described above, but the present invention is not limited to these embodiments. Additions, omissions, substitutions, and other modifications of the configuration are possible without departing from the spirit of the present invention.
Further, the present invention is not limited by the above description, and is limited only by the appended claims.

According to each of the above embodiments, it is possible to provide the adhesive fixing method and the optical assembly of the optical assembly capable of fixing each assembly component of the optical assembly with high strength and high accuracy.

1, 11, 21, 31, 41 Optical Assembly 2, 12, 22 First Part (Assembly Component, First Assembly Component)
2A, 3A, 14A, 16A, 24A, 26A Holding portions 2B, 3B, 14B, 16B, 26B first adhesive surfaces 2C, 3C, 14C, 16C, 26C second adhesive surfaces 3, 13 second components (assembly components , Second assembly components)
4, 4A, 4B UV curing adhesive curing part 4 L UV curing adhesive 5, 5 A, 5 B thermosetting adhesive curing part 5 L thermosetting adhesive 9, 10, 20 holding jig 12a, 13a adhesive curing part 14, 24 1st lens frame 15 1st lens (optical parts)
16 Second lens frame 17 Second lens (optical parts)
23 Third Part (Assembly Component, Second Assembly Component)
24B Third adhesive surface 24C Fourth adhesive surface 26 Third lens frame 27 Third lens (optical components)
30 heating tank 32, 42 first part (assembly component, first assembly component, optical component)
32a, 33a, 43a Lens part (optical parts)
33 Second Part (Assembly Component, Second Assembly Component, Optical Component)
43 Third Part (Assembly Component, Second Assembly Component, Optical Component)
L UV light O14, O16, O24, O26 central axis line O32a, O33a, O43a lens optical axis

Claims (2)

1. Adhesive bonding of an optical assembly to form an optical assembly by adhesively bonding a plurality of assembly components comprising an assembly component having an optical component, comprising:
   Interposing an ultraviolet curing adhesive and a thermosetting adhesive between parts of the plurality of assembly components to be fixed to each other;
   Holding the plurality of assembly components relatively movably in the uncured state of the ultraviolet curing adhesive and the thermosetting adhesive, and adjusting the relative positions of the plurality of assembly components;
   Curing the UV curable adhesive while holding the plurality of assembly components in the adjusted position;
   Holding one of the plurality of assembly components and releasing and holding the other of the plurality of assembly components after the UV curable adhesive has been cured;
   Curing the thermosetting adhesive while holding one of the plurality of assembly components;
   A method of adhesively fixing an optical assembly, including:
2. An optical assembly in which a plurality of assembly components including an assembly component having an optical component are adhesively fixed via an adhesive curing unit,
   Among the plurality of assembly components, a first assembly component and a second assembly component adhesively fixed to each other are:
   Each of the holding parts is provided at a part that can be held and released independently of one another, and the adhesive cured part is fitted with a clearance that allows relative movement in an uncured state,
   The adhesive cure between the first assembly component and the second assembly component is:
   A UV curable adhesive curing section formed by curing of a UV curable adhesive filled in a first region between the first assembly component and the second assembly component;
   A thermosetting adhesive cured portion formed by curing of the thermosetting adhesive filled in the second region between the first assembly component and the second assembly component;
   including,
   Optical assembly.

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