JPS5931914A - Lens holder - Google Patents

Abstract

PURPOSE:To hold a lens in a lens frame without any play and to prevent the shape alteration of the lens due to temperature variation, by providing a means of absorbing size variation in the radial direction and/or thrust direction of the lens between the lens frame and lens, and interposing a deformation absorbing sleeve which absorbs radial size variation between radial directions. CONSTITUTION:A deformation absorbing frame 37 is fitted around the plastic lens 50 and a disk sleeve 33 is fitted around the deformation absorbing frame 37; and then the outer circumferential abutting back surface 50a of the plastic lens 50 is allowed to abut on a lens barrel joining part 31, the disk sleeve 33 is fitted in a fitting part 34, and a presser ring 36 is engaged threadably with a screw part 35 to press the frame body 40 of the deformation absorbing frame 37 with the pressure surface 36a of the ring. When the plastic lens 50 fixed as mentioned above is placed in a high temperature state, it starts expanding, but variations in the thrust and radial directions are absorbed by the elastic deformation of the thrust deforming beam 41 and radial deforming beam 42 of the deformation absorbing frame 37.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a lens holding device that holds a lens in a lens frame, and in particular, the lens holding device that holds a lens in a lens frame, particularly has a surface J that has low temperature resistance (a plastic lens does not change shape even when the temperature changes). By fixing it in the lens frame, it maintains the lens performance and has strong temperature resistance (・Provides lens thread, and also provides plastic lenses and other non-temperature resistant lenses.・Expands the temperature range in which the lens can be used. That is.

Conventionally, when a lens, for example a plastic lens 7, is mounted 71if in the lens frame 2, the lens frame 2 is mounted as shown in FIG. 1a.
The plastic lens 7 is fitted into the lens frame fitting part 5 while the rear outer peripheral edge 7a of the plastic lens 7 is in contact with the lens frame body attachment 4 of the lens frame, and the lens frame is screwed onto the inner periphery of the lens frame 2. A threaded portion 6f screwed onto the outer periphery of the presser ring 1 on the threaded portion 3
While screwing together, the presser ring 1 is screwed into the inside of the lens frame 2, and the contact line 1a with the plastic lens 7 formed on the inner circumferential edge of the presser ring 1 is pressed against the outer circumferential edge 7blC of the front side of the plastic lens 7, It is constructed by fixing the plastic lens 7 within the lens frame 2.

Now, after assembling the plastic lens 7 to the lens frame 2, which has a fragile structure, at room temperature, if it is exposed to a warm atmosphere, the coefficient of linear expansion of the molding material of the plastic lens 7 or the mirror The linear expansion coefficient of the molding material of the frame 2 and the presser ring 1 is thicker (because of this, the lens frame fitting portion 5 of the lens frame 2
clearance becomes smaller.

Furthermore, this effect f is most noticeable at the contact area 8 between the lens 7 and the presser ring l in Figure 1a (see the enlarged view β shown in Figure 1A), and this area is affected when the parts are assembled at room temperature. The clearance is already zero in the above-mentioned high-temperature atmosphere (in other words, the difference in linear expansion coefficient of the molding moon between the lens 7 and the presser ring l may directly affect the surface shape. V
C becomes.

That is, there is a dent in the abutment edge 1a of the presser foot #!1 or the outer peripheral edge 7b on the front side of the lens 7 that is in pressure contact with the lens 7 and the presser ring 1, and the presser ring 1 contact edge 1
Due to a, the lens 7 is regulated to have zero clearance.

Once, as the temperature becomes crystalline (9), the plastic lens 7 begins to expand in the radial direction, or the deformation of the plastic lens 7 in the radial direction is regulated by the control by the holding ring IK. , the lens 7
Thermal stress occurs internally.

Then, the thermal stress generated inside the plastic lens 7 concentrates on deformation in the direction of the optical axis at °C, which is not subject to regulation.
The plastic lens 7 will be deformed in the optical axis direction.

Considering the cross section of the plastic lens 7 in the axial direction including the optical axis, since the length of the chord AB in cK in FIG. radius becomes smaller.

Approximate to

Conversely, when the plastic lens 7 and lens frame 2 assembled together at room temperature are exposed to a low temperature atmosphere, the linear expansion coefficient of the molding materials of the plastic lens 7, lens frame 2, and presser ring 1 will be Due to the difference in In this case, the outer peripheral edge 7b on the front side of the plastic lens 7, which is fixed in temperature by the pressure contact of the abutment edge 1a of the presser ring 1, receives the force, and as a result, as in the case of the above-mentioned high temperature, the plastic lens 7 The contraction cannot be more than the contraction of the presser ring lσ), and thermal stress is generated inside the plastic lens 7, and this thermal stress is not restricted by the presser ring 1.
It concentrates in the original axis direction and deforms the plastic lens 7 in the optical axis direction.

Therefore, considering the Ifr plane in the axial direction including the optical axis of the plastic lens 7 shown in FIG. 1d, it becomes the 1st chord AB.

Now, the length of the arc σ) at room temperature is AB, and the length of the arc at t°C lower than room temperature is A'B'5.If the r4 expansion coefficient of the molding material of the plastic lens 7 is α, then after n 3. (l-αt
) is approximated.

Therefore, for the above reasons, when the plastic lens 7 is mounted in the lens frame 2 having a conventional structure using the presser ring l, the radius of curvature of the plastic lens 7 changes due to temperature changes. In other words, it is clear that it is small at high temperatures and becomes large at low temperatures, and it also causes a large shift in the focus position and worsens each of the four aberrations compared to at room temperature.

In addition, in the conventional lens and lens frame configuration, the first
As shown in FIG. A composite lens configured to reduce the frictional resistance between the two lenses 21, 22 which are adjacent to each other by their outer peripheral edges, and to prevent misalignment of the lenses between the two lenses 21, 22. It was proposed by the invention of Utility Model Application Publication No. 55-138606.

However, in the case of this configuration, the friction between the two lenses 21° and 22 is only reduced, and the configuration in which the lens 21° and the 22 ft fitting part 26 are fixed by the presser ring 25 is not possible.
There is no change in the conventional structure to the thin tubes, and the lenses 21 and 22 have their outer diameters regulated by the fitting ring 26 of the lens holding member 23 or the inner diameter of the holding ring 25. It is impossible to prevent changes in the radius of curvature of the lenses 21 and 22 due to temperature changes, and it is impossible to avoid deviations in the focus position and aggravation of aberrations due to temperature changes.

Therefore, +; iJ lens σ for a conventional lens frame)
The shoulder-mounted structure prevents changes in the radius of curvature θ due to temperature changes, and maintains the lens without causing aggravation of each aberration due to bit/bit position deviation. There was an urgent need to develop appropriate countermeasures, such as one or other appropriate countermeasures.

Therefore, the present invention solves the various drawbacks of the conventional lens holding device described above, and in response to the above requests, a lens holding device according to the present invention is proposed. Each embodiment of the holding device will be specifically described.

FIG. 2 shows a first embodiment of the present invention, in which 30 is a lens frame, 31 is a lens barrel mounting portion provided at 1I (Ij) of this lens frame 30, and 32 is a lens fitting portion, which is attached to the lens frame 30. The fitting part 32 includes an inner diameter part 32a having a larger diameter than the outer diameter of the plastic lens 50 that is housed in contact with the outer peripheral back surface 50af of the lens body mounting part 31, and a disk sleeve for deformation absorption having a larger diameter than the inner diameter part 32a. A fitting portion 34 of 33 is provided.Furthermore, this fitting portion 34 is provided with a body attachment portion 34aft of the disc sleeve 33.

35 is a threaded portion into which a retaining ring 36 provided inside the lens frame 30 is screwed; 37 is a deformation absorbing frame;
Three thrust deformations are caused in the direction parallel to the optical axis from the inner periphery of the annular frame 40, which has an outer diameter corresponding to the inner diameter of the deformation absorbing arm 39 that protrudes perpendicularly to the inner periphery of the annular main body 38. Beam 4
1 and three radially deformed beams 42 in the direction orthogonal to the optical axis.
It is integrally formed with an elastic member by providing a protruding portion.

In addition, the inner diameter between each thrust deformation beam 41 is made to correspond to the outer diameter of the plastic lens 50.
A plastic lens 50 is formed on the outer periphery of each thrust deformation beam 41 so that it can be shaped like an outer ["'J'".
The radially deformable beam 42 is formed so that it can come into contact with a pressing edge 50b, which is a flat surface provided on the outer periphery of the plastic lens 50, when the radially deformable beam 42 is fitted around the outer periphery of the plastic lens 50.

Further, the width of the frame body 40 of the deformation absorbing frame 37 is wider than the width of the deformation absorbing sleeve 33σ).

In order to store and hold the plastic lens 50 in the lens fitting part 32 of the lens frame 30, which consists of one or more structures, first, the deformation absorbing frame 37 is fitted around the outer periphery of the plastic lens 50, and the deformation After fitting the disk sleeve 33 around the outer periphery of the absorption frame 37, the plastic lens 5
The outer periphery R 50a of 0 is applied to the lens barrel attachment part 31, and the disk sleeve 33 with an outer ω By pressing the frame 40 of the deformation absorbing frame 37 fitted around the outer periphery of the plastic lens 50 with the surface 36a, the plastic lens 50 housed in the lens frame 30 is moved between the inner periphery of the lens frame 30 and the deformation absorbing frame 37. Disc sleeve 3
Fix it with 3 interposed.

When the plastic lens 50 fixed as described above is left in a high temperature state, it will start to expand, but changes in the thrust direction and radial direction will be absorbed by the elastic deformation of the thrust deformation beam 41 and the radial deformation beam 42 of the deformation absorption frame 37. can do.

Further, the expansion of the deformation absorbing frame 37 can be absorbed by the deformation absorbing yoke 39 of the disk sleeve 33 fitted around the outer periphery of the deformation absorbing frame 37.

/Fj K, the change in the radial direction of the plastic lens 50 is absorbed by the elastic deformation of the radial deformation beam 33 of the deformation absorption frame 37, and if it cannot be absorbed completely within this elastic deformation, the deformation absorption arm 39 of the disk sleeve 33 , supplements the deformation absorption, and can be completely absorbed by the absorption action of both.

Once, the deformed absorption frame 37 and the disc sleeve 3
By changing the elastic modulus of the molded material 3, the effect of absorbing changes in the radial direction of the plastic lens 50 can be further improved.

On the other hand, when the plastic lens 50 is exposed to a low temperature, it starts to shrink, but when assembling it at room temperature, the thrust of the deformation absorbing frame 37 and the protruding direction of the radial deformation beams 41 and 42 are set in advance in the low temperature direction. By forming the plastic lens 50 by deforming it to
It can be held without wobbling.

According to the lens holding age in this embodiment, it is possible to prevent the plastic lens 50 held in the lens frame 30 from changing its shape due to temperature changes (as long as the shape r does not change drastically). .

Note that the deformation absorbing sleeve (f) has the following characteristics: The present invention is not limited to the illustrated embodiment, but can be implemented with a configuration that can exhibit the effects of the J9R period and does not cause shifts or tilts in the lens.

FIG. 3 shows a second embodiment, in which the lens frame 3 in the first embodiment is
The difference is that the structure of the disk sleeve 33 is integrated with the structure of the lens fitting part 32 of 0.

The rest is the same as the first embodiment.

In other words, a deformation absorbing beam 43 corresponding to the deformation absorbing arm 39 of the disk sleeve 33 in the first embodiment is constructed by protruding from the inner periphery of the lens fitting portion 3':L of the lens frame 31. As shown in FIG. 3, the deformation absorbing beam 43 has a neck (.
The inner diameter of each deformation absorbing beam 43 is formed to correspond to the outer diameter of the deformation absorbing frame 37, and each deformation absorbing beam 43 is individually protruded.
A notch 44 is provided in the opposing portion of the lens barrel mounting portion 31.

Then, the outer peripheral back surface 508 of the plastic lens 50 is placed against the lens barrel attachment part 31 in the lens frame 30, and the plastic lens 50 is dropped into the lens frame 30.
By rotating and holding the deformation absorbing parts 43 between the deformation absorbing parts 43 of 0 and fixing the deformation absorbing frame 37 with the presser ring 36 screwed onto the threaded part 35, the deformation absorbing parts 43 and The plastic lens 50 is held via the deformation absorbing frame 37'f.

Even with the plastic lens 5o in the lens holding device having the above configuration, the deformation absorbing portion 43 and the deformation absorbing frame 37 exhibit the same effect as in the first embodiment, and the plastic lens 5o is prevented from changing due to temperature changes. 50 can be maintained while preventing the shape from changing.

Next, FIG. 4 shows a third embodiment, and a lens peripheral deformation absorbing section 45 corresponding to the deformation absorbing arm 39 and deformation absorbing section 43 of the disk sleeve 33 in the first and second embodiments is projected onto the outer periphery of the plastic lens 50. At the same time, a self-deformation absorbing lens 51 formed by providing an engagement edge 46 with the thrust deformation beam 41 of the deformation absorbing frame 37 on the outer periphery of the deformation absorbing portion 45 is attached to the outer periphery of the lens frame 3o. It is constructed by interposing a diamond-shaped absorption frame 37 and identifying it with a presser ring 36, and the other constructions are the same as in the first embodiment.

In addition, the outer diameter of the engaging edge 46 provided in the lens peripheral deformation absorbing portion 45 of the self-deforming absorbing lens 51σ is made to correspond to the inner diameter of each thrust deforming beam 41 of the deforming absorbing frame 37, and is fitted between each thrust deforming beam 41. The deformation absorbing portion 45 is formed to have a thickness that is lower than the minimum thickness of the plastic lens 50.

Further, the inner diameter of the lens lowering portion 32 is formed to correspond to the outer diameter of the deformation absorbing frame 37.

The lens holding device VC66L of the unstable embodiment or the lens periphery deformation absorbing section 45 provided in the self-deformation absorbing lens 51 provides the same effect as the deformation absorbing arm 39 of the disk sleeve 33 in the first embodiment, and also absorbs deformation. It is possible to obtain a synergistic effect with frame 37.

The shape of the lens peripheral deformation absorbing portion 45 is similar to that of the deformation absorbing frame 37.
Plastic lens 50 due to the relationship between the shape and the molded moon
It suffices to absorb the dimensional change in the radial direction (a), and the example shown in Fig. 4-77 is not limited to one example.

FIG. 5 shows a fourth embodiment (σ), which is the same as the third embodiment except for which structure of the self-deforming lens 51 is different.

・A lens anchor 52 is provided protrudingly on the outer periphery of the plastic lens 5o, and a foam layer 5 is attached to the outer periphery of the plastic lens 5o via this lens anchor 52.
3.Self-deformable absorbing lens 5
After fitting the deformation absorbing frame 37 around the outer periphery of the self-deforming absorbing lens 51 constituting 1, the back surface 53a of the foam layer 53 is applied to the lens part 31 and dropped. Outer circumference σ) Fit the deformation 1 and accommodation frame 37 into the lens fitting 32 ('f
- The lens frame 3 is fixed by pressing the presser ring 36 a which is screwed onto the screw portion 35 together with the E-ro.
A plastic lens 50 is held within the lens.

Therefore, due to the elastic deformation effect of the foam 53 of the self-deformation absorbing lens 51, the dimensional change due to warming of the plastic lens 50 corresponding to the lens peripheral deformation absorbing portion 4-1 in the third embodiment is suppressed. It is possible to prevent the shape from changing due to the synergistic effect with the deformable absorbing frame 37.

The foam layer 53 is made by mixing a foaming agent with a necessary synthetic resin n-phase material and forming the plastic lens 50 by a foam molding method or the like.
The deformable absorbing frame 37 can be integrally formed on the outer periphery of the deformable absorbing frame 37.
By freely selecting and combining the material percentage properties (2 poles σ due to the relationship with the molding material), other embodiments can be obtained (・5# is used to simulate the effect of t4, so a lens with a better quality This can be expected to have the effect of preventing d2 from changing its shape.

FIG. 6 shows a fifth embodiment, in which the thrust and radial deformation beams 41 and 42 of the deformation absorbing frame 37 in the other embodiments are formed on the presser ring 36.
It is constructed so that the same effect can be obtained while omitting the deformation absorption frame 37.

1- That is, the holding ring 47 in the above embodiment is formed by protruding the thrust 'r-shaped beam 4B and the radially deformable beam 54 from the inner periphery of the cylindrical main body 48.

Further, the arrangement of the thrust beam 49 and the radial deformation beam 54 is also performed at tHt4. +z, second 1b deformed absorption frame 37
Each thrust and radial deformation is constructed in accordance with 41.42 (Torsional angle - (-J1□ is Fig. 2 1)). 0 screw part 3
5 is provided with a threaded portion that can be screwed into 2) to form the presser ring 47 of this embodiment. However, each radial direction gap 54 is as shown in FIG. Pressing part 54 of R50b
It is formed by the shape provided with af.

So, is the lens frame 3oσ) the outer circumferential back surface 50a of the lens part 31? The self-deformation absorbing lens 51 housed in the fitting part 32 of the lens 1 is fitted onto the outer periphery of the foam layer 53 with the thrust deformation beam 49 provided in the holding ring 47 screwed onto the threaded part 35 to form a radial deformation beam. By pressing and fixing the front surface of the foam layer 53 at 54, the self-deforming absorption lens 51 can be held in the lens frame 30 through the thrust of the holding ring 47 and the radial deformation angle 54. can.

In particular, the thrust and radial deformation beam 4 is integrated with the retaining ring 47 by integrating the deformation absorbing frame 37.
It is possible to obtain a stroke in the thrust direction of 9.54 and realize a more effective beam σ) shape.

In addition, regarding the arrangement of the thrust and radial deformation beams 49 and 54 in the holding ring 47, their condition and shape are based on the configuration example of the deformation absorbing frame 37 shown in Fig. 6 and Fig. 4.2.・Although not limited to these,
Alternatively, it can be implemented with a configuration suitable for absorbing thrust and radial deformations of the plastic lens 5°.

Therefore, the holding device g in this embodiment is similar to the other embodiments due to the thrust and radial deformation strips 49° 54 of the presser ring 47 and the structure of the foam layer 53 provided in the self-deformation absorbing lens 51. In addition, compared to other embodiments, the deformation absorbing frame 37 is omitted, and the configuration ft.
In addition to being simple, the thrust and radial deformation beams 49 and 54 are integrally provided in the presser ring, allowing for easier strokes in the thrust direction (even the first two beams 49,54σ
) Expect more effective effects 1- Rokotoka can do it.

Also, perhaps because they did not show a specific example in the drawings, instead of the self-deforming absorbing lens 51 shown in the holo diagram, the self-deforming absorbing lens 51 shown in the fourth figure was fixed to the presser ring 47 of the example. The lens holding device 4, or the second
, 3 for the deformed absorbing frame 37 and presser ring 36 in the example of a>1,2 center force envelope in FIG.

Even with the lens holding device tK that uses the holding bar 47 of the 18th example, it is possible to implement the function and utility of the inventive place 1υJ in a fourth manner.

It is clear from the above explanation]tt, Lens Holder 4 of the Invention
According to the shield, when fixing the lens housed in the lens frame with a holding ring, means for absorbing dimensional changes in the lens frame and lens It-1j in the radial direction O.5 and/or thrust direction is provided. At the same time, a deformation absorbing sleeve that absorbs the dimensional change f in the radial direction is interposed between the radial direction, so that the lens can be held in the lens frame without looseness, and the shape change of the lens due to temperature change can be held as described above. This can be prevented by the action of both the means and the tube 17, as well as by their synergistic action.

As a result, the operating temperature range of a lens system using a plastic lens can be expanded.

Furthermore, it is not limited to plastic lenses, and the lens holding device of the present invention can be applied to conventional lens fixing methods due to temperature changes and lens solidification methods. It is possible to maintain the same σ) performance as in the case of medium-quality products.

It is possible to achieve the design quality of the lens system.

[Brief explanation of the drawing]

Figures 1a-e show four main groups of conventional lens holding devices,
Figure 1a is a side sectional view 1. Figure 1 is an enlarged sectional view of Figure 1a, Figures 1c and d are explanatory diagrams showing changes in the radius of curvature of the lens due to temperature changes in the lens holding device of Figure 1a, and 1fae is an enlarged sectional view of Figure 1a. Figures 2 to 6 are side sectional views showing a different embodiment from Figure a, and Figures 2 to 6 show first to fifth actual flow examples of the present invention; Figures 2a and 3a; Figures 4 to 6 show all examples 7r<-t I
Figure 2 is a cross-sectional front view of the first embodiment.
FIG. 30φφ writing frame 31... Lens force attaching part 32... Lens lower coupling part 33... Disc sleeve 34... Uta coupling part 35-9-threaded part 36.47Φ・11 holding ring 37... Deformation absorbing frame 38, main body 39... deformation absorbing lever U 40... 1 ring 41.490-, thrust cylindrical hook 42.54, pot, radial deformation beam 43...e deformation absorption beam 44... ... Notch portion 45 ... Lens peripheral deformation absorbing section 46 ... Firefly engaging edge 48 ... Main body 50 ... - Flasdic lens 51 - Self-deformation absorbing lens 52 ... Lens anchor 53 ... Foam layer・、ノ4、-Q4:z Figure 1 (Q) (b) Figure 1 (C) (d) Figure 3 Figure 4 Figure 5 Procedural Amendment (Auto-A) October 1982 3011 Kazuo Wakasugi, Commissioner of the Japan Patent Office, Showa 5141 Patent Application No. 142479@2, Title of Invention Lens Holding Device 3, ? Ministry to do Ili +I 7Jl ri,! :Relationship Patent applicant (1) Follow the scope of the claims on the attached sheet. (2) “With,” on the 3rd negative line 20 of the specification
``It is -4゛, that is.'' (3) Line 14.20 of member 10 of the specification, line 16 of the same
jj line 5.6, line 19 of the 18th shell, line 2.16 of the 19th shell, and line 3 of the 20th shell, respectively.
"Thrust" is corrected to "Radial". (4) Specification 1, 10th line, 15th line, 11th line, 1st line
-2nd line, 18th negative line, 20th line, 19th line, 17th line, and 20th line, 3rd to 4th lines, respectively. (5) Meikan 11) Ig5 to 1st line t “1
Delete the content. (6) Details! *Described in the 6th line of the 12th line and the 18th line of the 13th line. [Deformed beam 41J is corrected to be "deformed beam 42." (Force written in the 12th negative line 6th to γb' of the specification, the 1st negative line 13th line, and the 13th shell line 19th [quake-shaped beam 42
" is corrected as "deformed beam 41." (8) "Radially deformed beam 41.42" written in Specification J, No. 13, line 6, No. 18, No. 14, line 4, and Page 19, line 4, respectively, is replaced by "Radially deformed beam 42. .41''. (9) The statement ``1 (as long as the shape r does not change drastically)'' on page 13, lines 14-15 of Specification 1 Iwa is corrected to ``(change in shape r to !h)''. [0] Insert humanities ¥ between lines 17 and 18 of the 14th negative line of Meikan J Utsu. [The number and gutter shape of the bent elbow absorbing beams 43 and the torso support portions 30 are not limited to these, but may be as long as they can hold the lens 50, absorb deformation in the radial direction of the deformation absorbing frame, and position the deformation absorbing frame. do. (11) The statements in lines 12 to 18 of the 15th chapter of the specification are amended as follows. [Next, FIG. 4 shows a third embodiment. A self-deforming absorbing lens 51 having a lens peripheral deformation absorbing portion 45 thinner than the lens minimum thickness on the outer periphery of the lens 50, and an engaging edge 46 that engages with the radially deformable beam 41 of the shank-shaped absorbing frame 37.'' (12) “Deformed absorption frame 37” on page 16, line 16 of the specification
1 deformation absorption frame 37, radially deformed beam 4
1 and ``1''. (13) Details'! The ``i@16@line 18th line 18th lens'' is corrected to ``(repeat the lens).'' (14) Page 19, line 20 of the specification, line 20 of the same. Teidai T~
"Thrust and radially deformed beams" written in line 8, line 16 of the same page, and line 1 of page 21 are corrected to "radial and thrust I-shaped beams." (]5) In the specification [Cao 2F, page 23, line 3, the description "cross-sectional view in a thousand planes" is corrected to read "cross-sectional view along line rA-A". (16) Drawing allowance 21 yen la, figure 3 a is corrected on the attached sheet. 9. Attached + 1 document list (1) Attachment 1 copy (2)
Supplementary Figure 117 IM7 1 s Separate Ozu (2, Claims (1) In a lens holding device that fixes the lens housed in the lens frame by means of a screw, the lens is attached to the lens frame and the outer periphery of the lens. radial and thrust =
1. A lens holding device characterized in that a means for absorbing J-direction changes is provided, and a deformation absorbing sleeve for absorbing dimensional changes in the radial direction is interposed between the radial directions. (2) In addition to the lens fixing mechanism, which is fixed by a lens holding ring housed in the lens frame, +1', l; means for absorbing dimensional changes in the radial direction and thrust direction of the lens with 3% holding salt. A lens 1 holding device whose signature is good quality. (3) Lens holding g f? that holds the lens housed in the lens frame firmly with a holding ring. In 7! (A self-deformation absorbing lens that serves as a means for absorbing dimensional changes in the radial direction of the fJ'nr2 lens, and a deformation absorbing sleeve that absorbs dimensional changes in the radial and thrust directions interposed in the radial direction 11 of this self-deformation absorbing lens. (4) In the lens holder g+b for fixing the lens housed in the lens frame with a holding ring, a mechanism for absorbing dimensional changes in the radial direction and thrust direction of the lens; A lens holding device equipped with a retaining ring that holds a means for absorbing the dimensional changes in the radial and thrust directions of the deformation grade lens and the nfl +tL lens. The means for absorbing dimensional changes in the direction consists of a variable absorbing frame in which a radial deformation beam and a thrust deformation beam are provided in an annular frame; Soft lens holding arm. (6) The deformation absorbing sleeve is 5R away from the disc sleeve that supports the deformation absorbing arm.
J+ or Section 2 d Self-mounted lens holder -0 (7) The self-deforming absorbing lens has a plastic lens on the outer periphery,
Claim 3: A lens peripheral deformation absorbing portion is provided to form an engaging edge with the f-shaped beam.
Jl or lens holding drawing described in Section 4. (81F7iJ Nt self-transforming 3f) Absorption lens, consisting of a foam layer provided on the outer periphery of a plastic lens.
'Fs * Range 3rd term or skin 4th term axis lens holding device. (9) The holding ring is a lens holding device according to item 2 or 4 of the study scope, in which the holding ring is formed by protruding a radial L/variable jh beam and a sluth f-shaped beam. U(υ) The lens holding mechanism according to claim 1, characterized in that the lens frame is provided with a deformation absorbing beam. (Q)

Claims (1)

[Claims] (1) In a lens holding device that fixes a lens housed in a lens frame with a holding ring, there is a dimensional change in the radial direction and/or thrust direction of the lens between the outer periphery of the lens. A lens holding device characterized by being constructed by providing means for absorbing dimensional changes in the radial direction and interposing a deformation absorbing sleeve in the radial direction to absorb dimensional changes in the radial direction. (2) A lens holding device that fixes the lens housed in the lens frame with a holding ring, and the valve ring is provided with means for absorbing dimensional changes of the lens in the radial direction and thrust direction, and the radial direction A lens holding device characterized by being constructed by interposing a deformation absorbing sleeve in the radial direction to absorb dimensional changes. (3) A self-deformation absorbing lens that fixes the means for hardening the lens housed in the lens frame with a clamp, and a deformation absorber that absorbs dimensional changes in the radial and thrust directions that are interposed between the self-deformation absorbing lens in the radial direction. A lens holding device comprising a sleeve. (4) A self-deformation absorber that serves as a means for absorbing dimensional changes in the radial direction and/or thrust direction of the front NO lens on the lens holding tooth that fixes the lens housed in the lens frame with a holding ring. A lens holding device comprising a lens and a retaining ring for absorbing dimensional changes in the radial and thrust directions of the lens. (5) Means for absorbing dimensional changes in the radial and thrust directions of the lens. (6) The deformation-absorbing sleeve comprises a deformation liquid storage frame in which a radial deformation beam and a thrust deformation beam are provided in an annular frame. The lens holding device according to claim 1 or 2, comprising a disk sleeve extending south of the absorbing arm. The lens holding device according to claim 3 or 4, further comprising a lens periphery deformation absorbing portion that forms an engaging edge of the lens. The lens holding device according to item 3 or 4, comprising: (9) The holding ring is formed by protruding a radial cedar beam J6 and a thrust deformation beam. Or special lens maintenance equipment listed in Section 4-81 -4°