JPS58220107A - Lens holder and plastic lens - Google Patents

Abstract

PURPOSE:To simplify the constitution for holding plural lenses, to improve the workability for assembling and to prevent the influence on temp. resistance, by holding the lenses with a holding rod, interposing spacers among the lenses and maintaning the spacings between the lenses. CONSTITUTION:Holding edges 5, 6, 7, 8 are formed in one body over the entire circumference of lenses 1, 2, 3, 4 forming a lens system, and holding holes 9, 10, 11, 12 are provided in three places at equal intervals in the circumferential direction of the edges 5, 6, 7, 8. A holding rod 13 is inserted through the respective holes 9, 10, 11, 12 to hold the lenses 1, 2, 3, 4, and the spacer rings 14 mounted on the rod 13 are interposed among the lenses 1, 2, 3, 4, to maintain the required spacings between the lenses. The constitution for holding the lenses is thus simplified, the workability for assembling is improved and the influence on temp. resistance is prevented.

Description

[Detailed Description of the Invention] The present invention relates to a lens holding part and a plus deck lens.
In particular, the object is to simplify the holding structure of a lens system consisting of a plurality of lenses, improve workability such as assembly, and provide a lens holding Pvt whose temperature resistance characteristics are not affected by tV.

A conventional lens holding device is constructed by dropping a lens into a lens frame and fixing it with a holding ring.

For example, Utility Model Application No. 53-40254 (Utility Application No. 11151-3) fixes a lens to a lens barrel using a pressure contact member.
6575) or the lens holding device described in Japanese Utility Model Application Publication No. 55-57709 (Utility Application No. 142280-1981),
Utility Model No. 1989-54- which fixes the I-gil by tightening the lens to the lens barrel and screwing it to the 0x tube + J ring.
There is an old lens manufacturing and mounting system described in Publication No. 151253 (Utility Application No. IM353-48131).

However, these lens holding devices ζ;I +? r + Hold the lens to be held within the lens frame as described 2)
Therefore, it is no exaggeration to say that lens accuracy is determined by the dimensional accuracy of the inner diameter of the lens frame and the outer diameter of the lens.

Therefore, in order to obtain a highly accurate lens system, it is necessary to improve the machining accuracy of the lens frame, and to perform careful oil dissolution on the centering accuracy of the lens.

In addition, in the case of plastic lenses, they are very susceptible to thermal chromatic tubes due to the temperature atmosphere in which they are used, but thermal expansion in the frame number, -, and IIV M can have a negative effect on optical properties. Although each of the above-mentioned devices 6 has taken measures against these drawbacks, there is a difference in processing precision between the frame and the lens. <Resolve JRukoshichi is fast and not fast.

Furthermore, the lens is dropped into the lens frame, and is held in place using an elastic member or the like to hold it in place. In order to fully automate the work of the lens holding bag W1, the equipment becomes complicated and the work becomes unavoidable.

Therefore, the present invention was developed in view of these drawbacks of the conventional lens holding device, and it uses a holding rod to hold the lens to be held. The lens is characterized in that it is constructed by interposing a spacer between each lens held by a rod to maintain the distance between each lens.

DESCRIPTION OF THE PREFERRED EMBODIMENTS The lens holding device of the present invention will be described below along with specific illustrated embodiments.

FIG. 1 is a partially longitudinal side view showing a first embodiment of the device of the present invention, FIG. 2a is a partially cutaway side view, and FIG. It's a gift.

In the first embodiment shown in Fig. 1.2, the lens system is configured 1.
Each lens 1.2.3.4 corresponds to each lens 1.2.3.
The lenses 1, 2.3.
A spacing ring 14 as a spacer is attached to the holding rod 13 and is interposed between each of the holding holes 9.10.11.12 of the lenses 1.2. It is composed by holding.

In addition, 1. When holding each lens 1, 23, 4 by the holding rod 13, a set screw 16 equipped with a washer 15 is screwed onto one end of the holding rod 13 in advance, and the lens 1. After inserting the holding hole 9 into the holding hole 9, attach the spacing ring 14, and then attach the next lens 2 and the spacing ring 14, then the lens 3 and the outgoing spacing ring 14, and then the lens 4 to the holding rod 13. After mounting, a set screw 16 with a washer 15 attached thereto is screwed onto the other end of the holding rod 13 to assemble it.

Additionally, a retaining hole 9.10.11.12 provided in the retaining edge 5.6.7.8 is provided on the outer periphery of each lens 1.2.3.4.
Similar to the structure of the lens 1, which is not shown in Figs. Rim 5
．． 6.7.8 The disease is caused by providing three holes at equal intervals in the circumferential direction, and each holding hole 9.10.11
．． It is constructed by attaching three holding rods 13 and a spacing ring 14 to 12 while inserting the thread.

Therefore, the retaining edge 5.6.7 of each lens 1.2.3.4.
The holding holes 91o111.12 provided in the lens 8 are formed in correspondence so that the optical axes of the respective lenses 1.2.3.4 can be aligned.

At this time, the concentric seats of each holding hole 9.10, 11.12 and the variation in hole diameter are between it<b, but in a molded product that can be used as a lens, the variation in molding is 0.05 to 0.1%.
It is possible to achieve a precision machining accuracy of 0.01 to 0.1% for molds and machining. do not.

It is clear from the above description that additional lenses 1.2.
3. In holding a lens system consisting of 4 lenses, each lens 1
．． In 2.3.4, drill the holding holes 9.10.11.12 into which the holding rods 13 that hold this are inserted, and insert the holding rods 13 into each of the holding holes 9.10.11.12. Each lens 1.2.3.4 is held and each spacing ring 14 attached to the holding rod 13 is interposed between each holding hole 9.10.11.12 of each lens 1.2.3.4. By doing so, each lens 1.2.3.4G is constructed by ensuring the distance between each lens 1.2.3.4 required for the lens system, and the above-mentioned conventional lens. 1ν holding device V1
This is how it became possible to hold each lens without using a lens frame, and it became possible to construct a lens system without a lens frame.

Therefore, the φ3 diagram is the lens holding device fVt of the present invention (
All the examples are shown, and the 41st sentence [a and b are partial vertical cross-sectional side views of the lens 21 used in Example G]! - and a front view.

The spacing ring 14 in the first embodiment is for each lens 1.2.3.
4 and attached to the holding rod 13, it is interposed to maintain the required distance between each lens 1.2.3.4. In this embodiment, a spacing protrusion 24.25.26.27 corresponding to the spacing ring 14 is provided on each lens 20.21.22.
．． 23. It is constructed by forming and shaping the body.

That is, as shown in Section 3.4 Figure 1, a plurality of lenses 2
0.21.27.23, the lens body 20a of each lens 20.21.22.23
, 21a, 22a.

Retaining edge 28.29.30 around the entire outer circumference of 23a
．． 31 is F” and the name retaining edge 28.29.30.
31 is a holding hole 32.3 into which the f [holding hole 13 is installed]
3.34.35 people - provided with protrusions for one interval 24.25.2
6.2 γ 4H protrusion ''' each lens 20.2
1.22.23 in each holding hole 32.23 as in the first embodiment.
1 on 33.34.35. The holder 13 is used to hold each lens 20, 21, 22, and 23.

Therefore, each lens has a phase power of 20.71, '2:2.23...
1 interval is established by fixing the retaining edges 2B, 29, 30, 31, and the protrusions 24, 25, 26, 27 for each interval. This is what I did.

In addition, each holding edge 28. of the famous lens 20.21.22.23.
Each spacing protrusion 24.25.29.30.31.
26.27 is the distance required between each lens 20, 21, 22, 23 phase M by 4% (i!f). 25
A spacing protrusion 24 capable of maintaining a necessary spacing between both lenses 20 and 21 is provided protrudingly on the right side in FIG.
In addition to the spacing protrusion 25 provided on the lens 21 and the lens 20 on the left side in FIG. 26, and in the same way, a spacing protrusion 27 protruding from the lens 22 and a spacing protrusion 27 protruding from the left side of the lens 23. I have shown the case, but I have limited it to 11 actual cases.
For example, a protrusion for spacing (not shown) of the required length between the lenses 20 and 21 is inserted between the lenses 20 and 21.
．． By protruding only on either one of the lenses 21, 21, and 21, 21, the protrusions for spacing required for the distance between the lenses 21, 22 and the lenses 22, 23, respectively. , and an embodiment in which the grooves between the lenses 22 and 23 are protruded only on one side, and therefore, depending on the capsule embodiment, this is formed on both the left and right sides of the holding edge. ffl on both left and right sides of the lens
If a protrusion for spacing of the required length is provided between each lens that corresponds to t-' + 7, only a holding hole is provided on the holding edge of each lens to be held on both the left and right sides of this lens. In other words, the first
Group 1 from the lens having the configuration of the example and the configuration of the second example
Examples of combinations of famous lenses such as 7r, b r c, and lens holding equipment can be mentioned.
1, there is one space on the right side of the holding edge 28 of the lens 20 (3) on the right side of the holding edge 28 of the lens 20, and three spaces protruding on the left side of the holding edge 29 of the lens 21. The spacing protrusions 24 corresponding to the protrusions 25 were provided protrudingly at two locations, and the spacing protrusions 24 having the length shown in the third figure were protrusively provided at two locations, and the other locations were
The length of the spacing protrusion 25 on the side of the lens 21 corresponding to kneading is made longer by the length necessary for the length of the spacing protrusion 24 in each of the lenses constituting the L-lens system. : The plan can be modified to maintain the necessary spacing.

That is, whether spacing protrusions are provided on either the left or right side of the lens holding edge or on both sides, and the number and length of the spacing protrusions will depend on the glaze configuration between each lens of the lens system to be constructed. It is possible to implement.

Figure 5 shows a third embodiment of the lens attachment device fjI of the present invention, and Figures 6a and b are partially longitudinal side views of a 1/2 lens equipped with a holding rod for holding the lens, used in this embodiment. Figure 2 shows a front view and a front view, respectively.

Now, in this third embodiment, the left lens 40 among the lenses 2.3.4.40 constituting the lens system is provided with a holding edge 41 around the entire outer periphery of its lens body 40a. At the same time, on the right side of this holding edge 41, three holding rods 42 for holding the lens are integrally installed.
It is 1.

Also, the other lens 2.3.4 is the front tiL! It has the same structure as Lens 2.3.4 in the m1 embodiment.

After attaching the spacing ring 14 required between the lenses 3 to each holding rod 42 of the lens 40, insert each holding hole 11 of the lens 3 into each holding rod 42 to hold the 1ξ lens 3, and hold the 1ξ lens 3 in the same manner. A bale holding the lens 2.4 in groups while attaching the spacing ring 14 4.7 times, a hooker 15 is interposed at the end of each holding rod 42 of the lens 40, and the end portion 42a is
It is constructed by shimming and stopping.

Of the lenses that make up the lens system, the left side o) +,
An example of a firefly M'li with a holding rod 42 protruding in place of the holding rod required in Embodiment 1.2 is given below.
However, according to this, it is also possible to push the holding rod and place the lens on the right side. -1,-
At the same time, the lens system is configured 1'? l/'・At least one of the multiple lenses has a holding rod at 79
(It is possible to implement it separately, however, the 12th example is
In the case of attaching a holding rod to one of lenses 2, 3, and 4 in the lens shown in the figure, the length that can hold the other lens is placed on both the left and right sides of the holding edge of the lens. It is necessary to install a retaining rod protruding from the washer 1.
Needless to say, the end portions of each holding rod are caulked by intervening 5 and crimping I4.

Furthermore, regarding the spacing ring 14, according to the first embodiment,
Now that the third embodiment has been constructed, the lens system is constructed by interposing a lens formed separately from the lens 2.3.4.40. However, according to the second embodiment, the required distance tI' is maintained between each lens 2.3.4.40, and ? ! ) It is also possible to implement this by installing a spacing protrusion on each lens 2.3.4.40.

FIG. 7 shows a fourth embodiment of the lens holding device of the present invention; in this embodiment, a lens mirror is used.

It is constructed by holding each lens 1.2.3.4 in the first embodiment while using a holding rod 51 with a length of 1lt1' in the frame 50, and there is a space between each lens 1.2.3.4. This is constructed by interposing the spacing ring 14 of the first embodiment, and is the same as the other configuration 1111 embodiment, so the same two
Set the number to 1 and omit its explanation.

Note that a washer 15 is interposed between the ends 5 of each holding rod 51.
It is constructed by caulking 1a.

In addition, a lens barrel 50 equipped with a holding rod 51 is used, and each lens 2 is equipped with a spacing section 24, 25, 26, 27.
0.21, 22, and 23 with the same configuration, and it is of course also possible to implement it by combining a lens provided with a spacing protrusion with a lens that does not have this.

Furthermore, in each of the above embodiments, the holding edge is provided all around the outer periphery of the lens. It is also possible to configure the retaining hole in each embodiment by an edge, and the retaining hole in each embodiment is
Regarding the number of holding rods, it is possible to obtain the desired effect by providing at least two or more holding rods.

As is clear from the above explanation, the present invention has the following advantages: 1. When maintaining a lens system consisting of a plurality of lenses, a holding rod is inserted into a holding hole provided in each lens to hold each lens. At the same time, a spacing ring as a spacer attached to the holding rod is interposed between the holding holes of each lens to maintain the distance between the lenses. Lens accuracy is determined by the dimensional accuracy between the inner diameter of the lens frame and the outer diameter of the lens in a lens holding device that can hold the lens without using a lens frame, and the lens is dropped into the lens frame and fixed with a presser ring. The problems of can be solved.

In addition, by using the plastic lens of the present invention, the holding rod can be inserted through the holding hole provided in the plastic lens, and the distance between each lens can also be adjusted in relation to the attachment of each lens to the holding rod. As a result, it can be held by a spacing ring or a spacing protrusion provided on the lens itself, resulting in a very ff1I lens system. It can perform the assembly of holding equipment and facilitate the automation of this divine work.

Furthermore, according to the lens holding device of the present invention, since the lens is held without using the lens φ or frame in traditional Japanese lens holding devices, the disadvantages of plastic lenses that are easily affected by temperature resistance can be solved at once. In addition to being able to solve the problem, the present invention has been described above.
By making the spacing protrusion with the holding hole made of the same resin material as the lens, it can be made into a temperature pot. Therefore, the influence of the optical characteristics of each lens 8' constituting the lens system on the temperature I can be minimized.

[Brief explanation of the drawing]

1 is a partially longitudinal side view showing a first embodiment of the lens holding cage of the present invention; FIGS. 2a and 2b are partially longitudinal side views and front views of the plastic lens used in the same embodiment; FIG. 3 is a partially longitudinal side view showing a second embodiment of the lens holding device of the present invention, and FIGS. Fig. 5 is a partially longitudinal side m1 view showing a third embodiment of the lens holding device of the present invention, and Figs. FIG. 7 is a front view of Cape Kan in the eastern part of the fourth embodiment of the lens holding device fft of the present invention. 1.2.3.4.20.21.22.23.40...
Plastic lens 5.6.7.8.28.29.30.31.41...
Retaining edge 9.10.11.12.32.33.34.35...
Holding hole 13.42.51... Holding rod 14Φ... Spacing ring 24.25.26.27... Spacing protrusion 15... Washer 16... Stop screw 50... Lens frame special #' [Applicant: Olympus Optical Industry Co., Ltd. No. 1
Figure 3 Figure 5 Figure 1 Figure 6 (a) (b)

Claims (1)

[Claims] (1) Lens retention percentage of lens system consisting of WIN lenses
fff, a holding rod is passed through a holding hole provided in each lens of the lens system to hold each lens, and a spacer attached to the holding rod is interposed between the holding holes of each lens, and each of the above-mentioned 1. A lens holder, characterized in that it is constructed by maintaining a distance between lenses. (In a lens holding device 11 for a lens system consisting of lenses of 20 g!IQ, a holding rod provided for at least one lens of the lens system is inserted into a holding hole provided for each lens of the lens system, and a spacer attached to the holding rod is interposed between the holding holes of each lens to maintain the distance between the lenses. <3) In a lens holding device for a lens system consisting of a plurality of lenses, a holding hole provided in each lens of the lens system includes:
By inserting a holding rod to hold each lens and interposing a spacing protrusion provided in the holding hole of each lens in the holding hole m1 of each lens to maintain the distance between the lenses. (Lens system σ consisting of 4HGl lenses) In the lens holding device, at least one lens of the lens system is inserted into a holding hole inserted into each lens of the lens system. A holding rod is inserted through the holding rod to hold each lens, and a spacing protrusion provided in the holding hole of each lens is interposed between the holding hole of each lens to maintain the distance between the lenses. (5) A plastic material characterized by having a holding edge around the outer periphery of the lens body and a holding hole provided in the holding edge. Lens. (6) A plastic lens characterized in that a holding edge is provided on the outer periphery of the lens body, and a spacing protrusion with a holding hole is formed on this holding edge with a small number of holes. A plastic lens characterized in that it has an L-shaped configuration in which a holding edge is provided and a holding rod for holding the lens is provided on the holding edge. (8) The front d1j holding hole is composed of at least two or more holding holes. , characteristic #'l' 1itl search range 5th Tt*,
Plastic lens on Wi1. (9) The plus deck lens according to claim 6, in which the spacing protrusion comprises at least two or more spacing protrusions. The plastic lens described in item 7, the range of the special FFL'f required by the holding rod.