JPS59218409A - Joining device of lens - Google Patents

Abstract

PURPOSE:To hold the capacity of lenses without either peeling-off of lenses or a considerable change of lens shapes by providing an elastically deformable holding part on the outside circumference of the first lens and holding the second lens directly or indirectly in this holding part. CONSTITUTION:The first lens 1a and the second lens 2a are constituted of plastics, and an elastically deformable ring-shaped holding piece 3 is provided along the direction of the optical axis on the outside circumference of the lens 1a, and detaining edges 4 are provided continuously on the inside edge of this holding piece 3 so that their sections are saw tooth-shaped. A jaw piece 6 where detaining edges 5 corresponding to said detaining edges 4 are provided continuously on the circumferential edge is provided on the outside circumference of the lens 2a. The elastic deformation is used to press the lens 2a into the holding piece 3 of the lens 1a, and detaining edges 4 and detaining edges 5 are engaged with each other to joint both lenses 1a and 2a, thus attaining a product A.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a plastic lens bonding device.

In the conventional lens system, as shown in FIG. 1, the cemented surfaces of the second lens b and the second lens b have the same radius of curvature, and adhesive 0 is used on the cemented surfaces to bond both lenses a and b. A structure in which two or more lenses are bonded to each other is used, such as a structure in which two or more lenses are bonded to each other.

For example, in the structure shown in FIG. 1, there is no problem if both the lens a and the second lens b are made of glass lenses, but if one or both of them are made of plastic lenses, then there is no problem. The following inconveniences occur.

That is, when the material of the second lens a is glass and the material of the second lens b is plastic, when trying to bond both lenses a and b with adhesive C, as the adhesive 0 hardens and shrinks, the second lens The cemented surface b changes significantly (such as a change in the radius of curvature), making it impossible to maintain the original objective of the lens performance. Furthermore, even if the change is within an allowable range in terms of design, the second lens b may peel off from each other, the change in the second lens b may become even greater and it may no longer function as a lens, or the adhesive may cause the second lens b to function as a lens. 2 lens b may also be affected.

This is the same thing even if the lens a is made of plastic and the second lens b is made of glass.

In addition, each of lenses a and b of No. 1.2 is made of plastic, and the contact surface is corroded by the adhesive C. Even if there is no such thing as an Since each lens a, b is bonded by the contact star and agent C, it is not possible to obtain a product with the opening radius as designed, or the bonded lens thread is not able to be obtained because the adhesive 12 is not cured evenly. This results in a large asperity on the lens, and there is also an I'lJ problem due to the difference in shrinkage of the lens, and as a matter of course, as mentioned above, peeling and lens damage occur. This resulted in large changes in the shape of the product, and it was not always possible to obtain a practical product.

The present invention was developed with attention paid to such points, with the aim of providing a cemented lens that is suitable for practical use.

The drawings show an actual example of the lens bonding device according to the present invention. The first embodiment shown in J and FIG.
The first lens 1a and the second lens 2& are made of plastic, and an annular holding piece 3 that can be elastically deformed is provided along the outer periphery of the second lens 1a in the optical axis direction,
On the inner edge of this holding piece 3, an appropriate number of receiving edges 4.4 with a serrated cross section are successively provided, and on the other hand, on the second lens 2& which is joined to the second lens 1&, this receiving edge 4.4. 4,...
The locking edges 5.5, . Using the elastic deformation of each member, push it into the holding piece 3 of the retaining edge 4.4.
, . . . and the locking edges 5.5, .
In place of the flange pieces 6 of the second lens 2&, as shown in FIG.
There is also a way to provide one. Of course, the holding piece 3 of the first runz 1a
The protruding piece 6a may have a shape similar to that of the protruding piece 6a, and does not need to be an annular body.

FIG. 5 shows a second embodiment, in which the second lens 1& is constructed in the same manner as in the attached @S1 actual drawing example, the material of the second lens 2b is made of crow, and the second lens 2b is engaged with the joint surface of the first lune 1a, a presser foot γ having locking edges 5.5, . This is referred to as product A. This presser foot I is made of metal, but it goes without saying that it may be made of plastic.

It should be noted that the holding piece 3 of the first lunion 1 & can be replaced with an annular body extending all the way around the outer periphery of the lubricant 1a and can be implemented with the same structure as the first embodiment described above. Receiving edge 4.4 in 3
, ... are not provided on the entire circumference, but are provided partially at required intervals in the outer circumferential direction, in addition, a corresponding locking ring 7 is provided continuously on the entire circumference. An example may be given in which the edges 5.5, .

In the third embodiment shown in FIG. 6, an elastically deformable holding piece 3' is provided on the outer periphery of the lune 1a as in the first embodiment, and an annular receiving piece is provided inside the tip of this holding piece 3'. On the other hand, an annular arm piece 9 that can be elastically deformed in the optical axis direction is provided on the outer periphery of the second lens 2a, and both lenses 1a and 2a are integrally formed. While expanding the holding piece 3' of the lens 1a outward, the arm piece 9 of the second lens 2& is contracted inward, and the second lens 2a is forcibly pushed inside the holding piece 3' of the second lunse 1a. By pressing the tip 9a of the arm piece 9 of the second lens 2& to the receiving edge 8 protruding from the holding piece 3' of the second lens 1a by the elasticity of the holding piece 3' and the arm piece 9, The lens 1 that processes the second lens 2a
Both lenses 1a are held within the holding piece 3' of a.

2a are joined to each other by t to obtain product A, and the shape of the holding piece 3' of the lunches 1& is the same as that of the holding piece 3 of the first embodiment.
Similarly, the second lens 2a, regardless of whether it is a thyroid gland or not.
It goes without saying that the arm piece 9 may be replaced by a plurality of protruding pieces protruding from each other at required intervals in the outer circumferential direction.In this embodiment, both lenses la and 2a are made of plastic. It is something.

The diagram shows the fourth embodiment of the present invention, and the holding piece 3'' of the lunches 1& is an annular holding piece that is elastically deformable and has a configuration similar to the holding piece 3 in the first embodiment. 3 “I.J.
・In place of the receiving edges 4.4, ・e in the first IM example, an annular protruding edge 11 is formed on the inner circumferential surface of this holding piece 3'', protruding in the circumferential direction. At the same time, an annular groove 10 corresponding to this protrusion 11 is provided on the outer circumferential surface of the other IN:2 lens 2a, and the second lens 2a is placed within the holding piece 3'' of the lens 1&. While pushing in, the concave groove lens 1as2b of the second lens 2a is joined to the arrow line 11 of the center/holding piece 3'' of the viewing lens 1a to obtain a product A.Furthermore, a fifth embodiment shown in FIG. In the example, a concave groove 10' is provided inside the holding piece 3, contrary to the fourth embodiment, and a protrusion 12 is provided in the concave groove 10' on the outer peripheral surface of the second lens 2b.
product A by fitting both lenses 1a and 2b to each other.
In these embodiments, the second lens 2b is made of glass, but it may also be made of plastic, and the projecting edges 11 and 12 are formed inside the holding piece 3''. Instead of the embodiment in which a plurality of engagement protrusions are provided on the entire circumference or the outer circumference of the second lens 2b, a plurality of engagement protrusions may be provided, or the grooves 10 and 10' may be provided partially. It may be a so-called engagement hole, and in short, it is sufficient if it is adapted to fit between the first and second lenses 1a and 2b.

It goes without saying that the cemented surfaces of both lenses have the same radius of curvature, and each embodiment takes the form of a cemented pair of lenses, but this departs from the gist of the present invention.
The present invention can also be applied to the case where three or more lenses are bonded to each other as long as C is possible.

Main departure! Since No. 11 has the above-mentioned configuration, it is possible to provide a product that is completely prevented from peeling off, changes in the radius of curvature, etc. due to the use of an adhesive.

Particularly, the second invention of the present invention is suitable for exchanging glass lenses and plastic lenses, and can be carried out without being restricted by the lens material. Since the lenses are joined while being held at the sides, there is an advantage that optical axis alignment between both lenses can be easily achieved. Since the two cemented lenses are bonded using their mutual elasticity, the vibration resistance between both cemented lenses can be improved.

[Brief explanation of drawings]

Figure 1 is a sectional view of a conventional lens bonding device, Figure 2-8
The figures show an embodiment of the lens bonding device according to the present invention, Fig. 2 is a ni-plane view of the first embodiment, Fig. 3 is a partially enlarged sectional view of Fig. 2, and Fig. 4 is the first embodiment. FIGS. 5 to 8 are front views showing modified examples of the second lens used in the embodiment, and sectional views showing each of the second to fifth embodiments, respectively. 1a... Second lens 2as2b... Second lens 3.3', 3II... Holding piece 4.800/Receiving edge 5... Locking edge 6... Flange piece 6a... Protruding piece 7. Fist presser ring 9 -- Arm piece 10.10' Concave groove 11.121" protrusion Patent applicant Olympus Optical Industry I'1.
Shikisha No. 1 - Fig. 2 Fig. 3 Fig. 4 Fig. 5 Fig. 6 Fig. 7 Fig. 8 Koito, 5 yen, IT official book (spontaneous) Mr. Kazuo Wakasugi, Commissioner of the Patent Office■ , Indication of the case 1988 FLJ58 Neheel '1 - Application No. 93170 2, Name of the invention Lens bonding device 3, Person making the amendment Relationship to the case Patent author Address 2-43 Hatagaya, Shibuya-ku, Tokyo No. 2 No. 4, Agent 6, “Detailed Description of the Invention” column 7 of the specification subject to amendment Contents of the amendment (1゛) Book 3111, page 8 ■ Line 2 r Viewed in the optical axis direction The description is 1 optical axis perpendicular direction -J overline I.

Claims (9)

[Claims] (1) An elastically deformable holding part is provided on the outer periphery of the first lun,
The holding part directly or indirectly holds the second lens,
A lens bonding device, characterized in that the second lens is bonded to the lens. (2) A [phase] C deformable holding part having an engaging or engaged part is provided on the outer periphery of the second lens, and a holding part or engaged part is provided on the outer periphery of the second lens. An engaged or engaged portion corresponding to the mating portion is provided, and the engaged or engaged portion is connected to the eleventh. The second lens is bonded to the second lens by engaging with an engaging part or a threaded engaging part provided in a holding part of the lens to hold the second lens in the holding part of the second lens. 1 nons joining device. (3) An elastically deformable holding part having an engaging or engaged part is provided on the outer periphery of the first lun, and a covering corresponding to the engaging or engaged part provided in the holding part of the first lun is provided on the outer periphery. An annular retainer ring provided with an engaging or engaging portion is provided on the outer periphery of the retaining portion of the first lun, and the retained or engaged portion is provided on the retaining portion of the first lun. The second lens, which is engaged with the second lens and bonded to the joint surface of the eleventh lens, is held in the second lens holding part via a presser ring that is engaged with the first lens holding part, thereby causing the second lens to be attached to the second lens. A lens bonding device characterized by bonding two lenses. (4) An elastically deformable holding part including an engaging part is provided on the outer periphery of the second lens, and an elastically deformable holding part is provided on the outer periphery of the second cotton lens to engage with the engaging part. The engaged portion of the holding portion is engaged with the engaging portion of the first lun, and the front T? +2nd lun's holding part, 21st lun's holding part
- A lens bonding device, characterized in that the second lens is bonded to the second lens by holding the lens through elasticity between the holding portion of the second lens and the holding portion of the second lens. (5) The holding portion of the first lun consists of an annular piece provided all around the outer periphery of the second lun, or a plurality of holding pieces provided at required intervals in the outer circumferential direction. 4. A lens bonding device according to item 1 or 4. (6) The engaged or engaged portion of the second lens is comprised of an annular collar piece provided around the entire outer periphery of the second lens or a plurality of protruding pieces provided at required intervals in the outer circumferential direction. A lens bonding device according to claim 2. (7) The secured or engaged portion of the presser foot is comprised of an annular flange provided around the entire outer periphery of the presser foot or a plurality of protruding pieces provided at required intervals in the outer circumferential direction. Range 3rd
Lens bonding device described in Section 1. (8) The holding portion of the second lens is composed of an annular piece provided all around the outer periphery of the second lens or a plurality of arm pieces provided at required intervals in the outer circumferential direction. Lens bonding device described in Section 1. (9) The retaining or locking engagement part provided in the first lunz holding part connects the receiving edge of the dispersion on the entire or partial inner circumference of the annular piece or on the inner side of each arm piece in a serrated cross-section. A lens bonding device according to claim 2 or 3, comprising: θ[)) The securing or engaged portion of the first lunz holding portion is
The lens bonding device according to claim 2 or 3, wherein an engaging convex portion or an engaged groove portion is provided on the entire or partial inner circumference of the annular piece or on the inner side of each arm piece. .