JPS5931910A - Lens holder - Google Patents

Abstract

PURPOSE:To reduce frictional resistance between a lens and a lens frame, and the lens and a presser ring and to vary the radial size of the lens freely, by interposing a friction reducing sheet between contacting surfaces of the lens and lens barrel joint part of presser ring. CONSTITUTION:The plastic lens 40 is held by a lens holder and the friction reducing sheet 37 made of, for example, ''Teflon'' or high-density polyethylene, etc., is interposed between the barrel jointing surface 31a of the lens abutting joint part 31 and the contacting surface 40b of the plastic lens 40 to reduce the frictional resistance between the plastic lens 40 and lens frame 30. Then, very free radial deformation of the plastic lens 40 is therefore realized. Fur this purpose, some clearance is provided between the external diameter of the lens and the internal diameter of the lens fitting part 33 of the lens frame 30 to prevent the plastic lens 40 from varying in shape with temperature.

Description

[Detailed Description of the Invention] A. Holding the lens in the lens frame [Regarding the lens holder IN, especially for plastic lenses with weak temperature resistance, 77n! The lens quality is maintained by fixing it in the lens frame so that its shape does not change even with changes in temperature. and other moisture resistance 1μ
The purpose of this is to expand the operating temperature range of non-toxic 1/L lenses.

When a lens, for example a plastic lens 7, is placed in the sewing machine 2, the first step is as shown in 1*i a; ++
< , Lens rot'+1 of the series frame 2) 11・I4 Attach the back outer peripheral edge γa of the plastic lens γ to the N part 4. At the same time, a threaded part 6 provided on the outer periphery of the holding ring 1 is screwed into the threaded part 3 of the holding ring 1 screwed on the inner periphery of the lens frame 2. Screw in this presser foot {; tl's inner side Ij'rl M, and place the abutting edge 1a with the plastic lens T on the outer peripheral edge γb on the front side of the plastic lens 7 at 14'. #L, .
It is constructed by fixing the plastic lens γ within the lens frame 2.

After assembling the plastic lens 7 to the lens frame 2 from the structure at room temperature,
{If B'<Ilj, in the air, plastic lens 7
Since the expansion rate of the molding material of lens frame 2 and presser foot Jv l is larger than the linear film +; J (rate of molding material of lens frame 2 and
The clearance of the lens frame fitting portion 5 becomes smaller.

Moreover, this effect is the most! 1'+: Written by i (, 7 Uke (Junogashin 1 Figure & contact part 8 of lens 7 and presser foot 1) (see the enlarged view shown in No. 1 Ib), The clearance is zero at the point G, which is assembled at the core temperature of the parts, and in the high temperature atmosphere, the molded elements in the lens 7 and the presser ring 1 are in a state of zero. The difference in the net expansion coefficient of will affect the shape of the i6 tangent surface il<.

That is, at the contact sounds 1 to 8 of the lens 7 and the presser ring 1, the presser ring 1 makes contact KI. ．． The front side of the lens 7 that is in pressure contact 1- (1) where the lens I has zero clearance due to the dented edge 1b of the presser foot 1 and the contact edge 1a of the presser foot 1)
I'm more concerned about being regulated by flies.

Therefore, the plastic lens 7 begins to expand in the radial direction q+!, but due to the regulation of the presser lx 1 c=, t:, the plastic lens 7 expands in the radial direction. Since the deformation of the lens 7 is restricted, thermal stress is generated inside the lens 7.

As a result, the thermal stress generated inside the plastic lens 7 concentrates on the unregulated deformation of the light in the ←11 direction, causing the plastic lens γ to warp in the optical axis direction.

Considering the axial cross section of the plastic lens 7 including the light H1, the chord A in FIG. 1C becomes smaller.

r) Now, the arc length QAB at low temperature is 1 of lens 7 than at room temperature.
f31 r! When i and the 4M rate are α, it approximates /7X,, (> ABT-ABC(1+αt).

Conversely, when the plastic lens 1 and the lens frame 2 that have been dissected at room temperature are exposed to a low-temperature W atmosphere, as described above, the molding material of the plastic lens T, the lens frame 2, and the presser ring 1 will be damaged.
Due to the difference in expansion coefficients, as the temperature decreases, the shrinkage of the plastic lens 7 is greater than that of the lens frame 2 and the presser ring 1, and the If! of the lens frame 2 and the presser ring 1 decreases. i! NiF2 tries to contract, but in this case as well, the outer peripheral edge 7b on the front side of the plus deck lens 7, which is fixed by pressure contact with the contact edge 1a of the presser ring 1, is restricted, and as a result, in the case of t111 at high temperature. Similarly, the contraction of the Plus Deck lens 7 cannot be achieved by the contraction of the presser ring 1, and the force is generated inside the Plus Deck lens 7, and this thermal stress causes the plastic lens T to shrink. , in the optical axis direction which is not restricted by the presser ring 1, deformation is given in the direction of the light 11t1 of the plastic lens I.

Therefore, the light d9 of the plastic lens 7 shown in FIG.
Considering the axial ItJ+ iT+i including 11,
The radius of curvature at which the lengths of the strings A and H are regulated by the presser bar 11 becomes larger.

Approximate to "i4-ru".

Therefore, from the following points, when the plastic lens I is mounted in the lens frame 2 with the conventional structure using the presser foot 1, 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 large at low temperatures, and JRi? Compared to ii'+ time,
It can be seen that this causes a large shift in the focus position and worsens various aberrations.

In addition, in the configuration of the conventional lens and lens frame described in n'IJ,
As shown in FIG. 1e, at least two lenses 21.22 are fitted into the lens fitting portion 26 of the lens holding member 23, and the centering member 24 is not interposed between both lenses 21.22. By doing so, it is possible to reduce the frictional resistance between the two lenses 2122 that are adjacent to each other by their outer peripheral edges, and to prevent misalignment of the lens centers in both lenses 21.221H7. A composite lens constructed as shown in FIG.

However, in the case of this configuration (2 lenses 21 and 22
The structure in which the lenses 21 and 22 are held down and fixed in the fitting part 26 by the fitting part 25 (25) is unchanged from the above-mentioned conventional T"2, and only reduces friction between the lenses 21 and 22.
22 has its outer diameter controlled by the fitting part 26 of the lens holding member 23 or the inner diameter of the presser foot 25, and similarly to the plastic lens 7, changes in the radius of curvature due to temperature changes of both lenses 21 and 22 are controlled. Unable to prevent slippage, 1(4+
・It is impossible to avoid hardening.

Therefore, the expression of the radius of curvature caused by the drift change G- in the conventional lens mounting configuration that appears in the lens frame is stopped by Ty + 1, and the focus position shift or L1 each f and [
・There was a strong desire to develop a method for holding the lens without causing hardening of aberrations, and to develop measures to eliminate c:j and other problems.

Therefore, the present invention solves the detailed drawbacks of the conventional lens holding device described above and meets the demands of O1l.
4 lens holders! Hereinafter, various examples of the lens holding device of the present invention will be specifically explained with reference to the drawings.

The second part is a vertical [g1 side view] showing an example of an actual jaw equipped with the lens holder 31 of the present invention.

30 is one frame, and inside this lens frame 30, a lens barrel mounting surface 31 of a plastic lens 40 is provided, and this lens 1j・mountain A=1 1Ijii of part 31 (-J surface 31
On a, a friction reducing part 4 432 is integrally formed by means of double molding, coating, adhesion, etc.

Further, on the front side of the lens barrel mounting surface 31, a lens 1β fitting part 33 having a larger diameter and an inner diameter corresponding to the outer diameter of the plastic lens 40 is provided, and on the front side of the lens fitting part 33. The screw 1 of the presser foot 35 has a larger diameter and an inner diameter corresponding to the outer diameter of the presser foot 35! ! +(36
A threaded portion 34 is provided to fit the two in the middle.

In addition, the plastic lens 40 (with a presser ring 35 around it)
The contact surface with the pressing surface 35a is a stepped portion having a parallel surface 40a.

However, the plastic lens is 40tJ-! : When storing fv in the e30, the current friction reduction between the barrel mounting surface 31a of the lens barrel mounting surface 31 provided with the friction damping member 32 and the contact surface 40b of the lens barrel mounting surface 31& and the positive lens 40. After inserting the sheet 37, the plastic lens 40
While fitting into the lens fitting part 33, push it down to the lens barrel mounting surface 31, and screw the holding part 35 into the threaded part 34, and place the parallel surface 4.Oa of the Plus Deck lens 40 with the pressing surface 35a. The plus deck lens 4° is held within the neck frame 30 by being fixed by the pressing force of the heddles of the clasp.

The abrasion tL sheet 37 is formed of a sheet having a low frictional resistance "1", such as a Teflon-based sheet or a high-density FFJ-polyethylene sheet.

Now, the lens holding mechanism consisting of the stiff j, '-+f formation-:? When the plastic lens 4o held at
F1. ! III: Starts deception because the C rate is high.

At this time, in the case of the conventional lens loading device R4, there is 1 liter between the contact surfaces between the plastic lens, the lens frame, and the presser foot.
As mentioned above, the friction resistance prevents the plastic lens from expanding freely, and thermal stress is generated inside the lens, causing a change in the shape of the lens.

However, G1, the plastic lens 4o held by the lens holding device according to the present invention has a contact surface JQ between the barrel mounting surface 31a of the lens barrel mounting surface 31 and the plastic lens 40.
The frictional resistance between the Plus Deck lens 40 and the lens frame 30 is reduced by the friction damping sheet 37 interposed between the lenses B, and as a result, the main shape of the Plus Deck lens 40 in the radial direction can be realized in a fairly free form. Lens outer diameter and lens frame 30
By providing a clearance between the inner diameter of the lens fitting portion 33, it is possible to prevent the shape of the plastic lens 40 from changing due to the temperature change.

The plastic lens 4 (+ outside j+ and the mirror frame 3
The difference (size of clearance) between the inner diameter of the lens fitting portion 33 and the inner diameter of the lens fitting portion 33 must be corrected in lens design.

Further, the thickness friction damping effect is achieved by the lens barrel attachment surface 31.
This is further aided by the friction damping member 32 provided integrally with the friction damping member 31a, and the desired effect can be more accurately exerted.

Figure 8rS3a shows the second embodiment of Ci, with one example of the real shield and one example of the O'J figure 3 (2) The plastic lens 40 is inserted through the absorbing sleeve 38, and the lens fitting of the frame 30 is shown. The only difference is that it is fixed within the section 33, but the other configurations are the same, so a detailed description thereof will be omitted.

Therefore, the deformation absorbing sleeve 38
A radial shadow beam 50 and a thrust deformation beam 51 are installed on one side of an annular main body 39 having an outer diameter corresponding to the inner diameter of
They are integrally formed by the elastic portions A and A, projecting from each other at a distance of 6'+'.

Everyone, each radial change J1gffi50 and thrust change 3'
E; It goes without saying that the beam 51 is formed to correspond to the outer diameter of the plastic lens 40 and the outer diameter of the step portion 41 that forms the parallel surface 40a.

Now, for the deformation consisting of pg II and sleeve 38 plus deck lens 40, each radial deformation beam 50 is placed on the lens periphery, and each thrust deformation beam 51 is placed on the periphery of the lens. 41, respectively, and the housing 7v (at the same time, the barrel of the lens barrel attachment part 31 ('NJ) and the contact surface 4 of the plastic lens 40.
A modification in which the plastic lens 40 is fitted into the lens fitting part 33 of the lens frame 30 while interposing the friction damping sheet 38 between the holes 0b, and then attached to the plastic lens 40 by the presser ring 35 screwed onto the threaded part 34. jlp 1v sleeve 38
The plastic lens 40 is pressed and fixed.

In addition, by fitting the main body 39 of the breast-shaped absorption sleeve 3 into the lens fitting part 33, the plus deck lens 40
The presser foot 35 is positioned in the radial direction.
Displacement in the thrust direction can be performed by.

In the lens holding device of the second embodiment having the above-described configuration, expansion and contraction of the plastic lens 40 due to changes in the filling ratio are caused between the contact surface 40b of the lens 40 and the lens barrel lunar surface 3.
Friction 1 due to the friction damping sheet 37 interposed between Ia? Due to the reducing action, the radial deformation beam 5 of the bowl-shaped absorption sleeve 38 is reduced along with the radial deformation Jlj due to the
0, and the elastic deformation of the thrust shaped beam 51 can compensate for dimensional changes of the plus deck lens 40 in the radial and thrust directions.

Therefore, for the lens holding device number 42 of this embodiment, first take the difference between the lens fitting part and the Cχ frame ('%). No heat or force is generated within the lens due to the change, and the plastic lens 4 can be held while preventing warping.

In addition, regarding the bowl-shaped 11ψ receiving sleeve 8 in this embodiment, its overall shape, ←) or the shape of J150.51 in both radial and thrust directions is shown in Figure 3. For example, by changing the angle within a range that can hold the plastic lens 40 within the lens joint 33 and absorb the dimensional changes in the radial and thrust directions of the plus deck lens 40, without It can be implemented.

Furthermore, both radial and thrust degree sections 50.51
By providing a groove (not shown) at the protruding root end with the main body 39, it is possible to improve the deformation absorption effect in each direction. This embodiment is based on the radial deformation beam 50 of the deformation absorbing sleeve 38 in the second embodiment.
and the pressing surface 351 of the thrust deformation beam 51
A retainer ring 35 is formed by protruding toward the L side, and the plus deck lens 40 is identified within the i-frame 30 by the retainer ring 35.The other structure is the same as that of the second embodiment. Regarding the effects, it is possible to obtain the same effects as in the second practical example.

In addition, due to the configuration with the second example M1i, the deformation absorbing sleeve 38
By constructing the retainer 35 using the presser bar 35 instead of forming it separately, there is an advantage that the construction and assembly work can be simplified.

FIG. 5 shows a fourth embodiment, in which a modified J] e absorbing disk sleeve 5
2 is interposed between the lens joint RA: 33 of the lens frame 30 and the outer periphery of the plus deck lens 40, and is the same as the other embodiments of the opening barrel 2.

In addition, the deformation absorbing disk sleeve 52 has a thickness J% t7>deformation (P) receiving part 53 on the inner periphery of the annular main body, which is thinner than the minimum thickness J of the plastic lens 40, and the outer diameter of the main body The inner diameter of the small diameter portion 33 corresponds to the outer diameter of the plus deck lens 40, and the diameter of the small diameter portion 53 corresponds to the outer diameter of the plus deck lens 40, respectively.

When interposed between the lens fitting part 33 of the lens frame 30 and the outer periphery of the plastic lens 40, : is the side periphery iMj
53 a to the lens barrel (1 surface 31 a, the outer circumferential surface 52 & is in contact with the inner circumferential surface of the lens fitting part 33, and the plus deck lens 40 is fitted to the inner circumference of the deformation absorbing part 53. The plastic lens 40 is pressed and fixed by a holding ring 35.

In such a lens holding device, thermal stress caused by a change in the radial direction of the plastic lens 40 due to a temperature change is concentrated on the first deformation absorbing portion 53 of the deformation absorbing disk sleeve 52, and the elastic deformation of the deformation absorbing portion 53 causes This is to contain the heat and force that would otherwise occur within the plastic lens 40.

Therefore, it is the same as in the other example 11] that the desired effect can be achieved by using other configurations.

The structure 1 of the deformation-absorbing disk sleeve 52 is not limited to the embodiment shown in FIG.

FIG. 6 shows a fifth embodiment, which differs from the other embodiments in that the plastic lens 40 itself is provided with means for absorbing dimensional changes in the radial direction.

That is, a lens peripheral deformation absorbing portion 5 with a thickness larger than the minimum lens thickness is provided on the outer periphery of the plastic lens 40.
4 is provided protrudingly, and a fitting part 55 with an outer diameter corresponding to the inner +F of the lens fitting part 33 is provided on the other side of the lens peripheral deformation absorbing part 54, and these are integrally formed with the plastic lens 40 in the shape y, 9. What to do: self-deforming absorption lens 5
6, and this self-X forming 11M lens 56 is attached to the lens frame 3.
0, and the low fitting part 55 of the outer F'rl is inserted into the lens barrel; Screw the presser foot 35 onto the presser foot 35, and attach the lens CFli+ to the presser 1■-face 35a, and the side deformation jjjj is 11V, and the fitting of the part 54 is r'i! ;
By pressing the 0111 surface of 55, the plus deck lens 40 is held in #:i P+' 30 [7 times σ) j−).

Changes in humidity can cause plastic lenses to break down due to 40 reasons.
The thermal stress that is about to be deformed is concentrated on the lens peripheral deformation absorption section 54,
The structure is such that it is possible to prevent the shape of the lens 40 from changing by absorbing the thermal stress g12 generated within the plastic lens 40.

In addition, due to the structure of the self-deforming absorbing lens 56, the housing portion 54 formed around the lens periphery 2 is replaced by a plurality of partially annular deforming absorbing ItV pieces (not shown) instead of being continuously provided on the outer periphery of the plastic lens 40. ) etc.

In addition, other configuration effects (as they are the same as those in the embodiment of Go et al., therefore, explanations thereof will be omitted.

FIG. 17 shows a sixth embodiment, which differs in the configuration of the self-deforming IIψ focusing lens 56 from the previous example, but the other configurations are the same as in the previous example.

The self-deformable absorbing lens 56 in this embodiment is formed by protruding a lens anchor 57 on the outer periphery of the plastic lens 40 and also forming a foam layer 58 on the outer periphery.

In addition, the foam 1'st 58 is formed by a foam molding method, and a skin layer (not shown) is provided on the outside.
It is possible to securely fix the presser ring 35 to the pressers L1 and 35a.

Furthermore, the bubble layer 58 is fitted with the 1-iJ lens M;
33, and as shown in FIG. Drop the plastic lens 40 into the lens body mounting portion 31 +, -, and press the foam layer 58 using the presser ring 35 screwed into the screw holder 34.

By suppressing 1lIi 35 a, the plus deck lens 40 is kept within Mh=30 ('j).

death! Secondly, the plastic lens 4 due to the change in lightness.
The purpose is to concentrate the j1 stress on the emitting layer 58 and absorb it by the elastic summer shape of the emitting θWI58, and to stop the 1 H-like change in the plus deck lens 40 due to other structural effects. The effect is similar to that of the second embodiment.

Figure 8 a and b show Example 1 of the seventh example, and the lens circumference i! in Example 5 of Figure 6. j Modification of the structure corresponding to the modified cedar absorption section 54 1. [This is constructed by casting the ψ yield 59 on the inner periphery of the lens fitting portion 33 of the 54 frame 30.

In addition, as shown in the eighth [\4b], the deformation 1 handling beam 59 is spaced apart from the inner periphery of the lens fitting portion 33 by 1? There are three projecting beams 59, and the lens barrel attaching surface on the back side of each beam 59 has a v1 notch 6.
0 is used to make the ηi character of 1-4459 more free.

It is not limited to the current structure.

Also in Example C-1, with the plus deck lens 40 fitted to the inner periphery of each modification 1 collecting beam 59, the tll
The plastic lens 40 is identified by pressing according to the image 35.
(see IU in Fig. 8a) The thermal stress that tends to occur in the plastic lens 40 due to temperature deterioration is absorbed by elastic deformation of each deformation absorption coefficient 59, and the shape change of the lens 40 is prevented. It is something to do.

FIG. 9 shows an eighth embodiment, in which a lens barrel mounting beam 61 and a radial peeling aperture 62 are provided on the inner periphery of the lens frame 30, and a lens pressing flange 6 is provided on the pressing surface 35a of the retainer 35.
3, each lens body support beam 61
The fjtl direction of the plastic lens 40 is locked at the same time as 1. After locking lr'+1 to each radial fishing-shaped projection beam (2), by pressing the parallel surface 40a of the plastic lens 40 with the 7 langes 63 of the presser foot 35 screwed into the screw fitting 34, The plastic lens 40 is attached to the thrust direction with 7 flange 63 and the radial direction [rl extension with 11M beam 6].
2 and held within the lens frame 30.

In addition, in M9 [MIb, the white 13 and □ condition with a lens fat attachment year of 61 and a radial deformation absorption rate of 62 are shown.
Therefore, the plastic lens 40 should be configured to be able to deform in both radial and thrust directions, and be rib-shaped with no under-warping due to processing. is desirable.

Therefore, in this particular example, the change in shape of the plastic lens 40 due to the deterioration of the temperature I is caused by lens IJ'-
1 (< J beam 61, radial deformation 1 deformation, elastic deformation of convergence beam 62). This is similar to the example.

In each of the above embodiments, the friction damping sheath 37 is shown only in the case where it is interposed between the lens barrel attachment part 31 and the lens 40; , 35a, the same effect can be achieved by interposing the friction damping member 32 of the first embodiment. , the same effect as ffJ?

Above N9. As is clear from the drawings, according to the present invention, by interposing a friction damping sheet between the contact surfaces of the lens and the lens body of the ψ frame or the contact surfaces of the lens and the holding ring, the lens and the lens frame are , it is possible to attenuate the frictional resistance between the lens and the holding ring, and to make the dimensional change of the lens in the radial direction free.

In addition, a lens deformation absorbing means is installed between the lens and the lens frame.
'J' l) The radial = J modalized absorption of the lens 1. The shape of the lens 4 [・Prevents the lens from becoming distorted and keeps the lens inside the lens frame]. I can do 'r'~
Ru.

Therefore, compared to conventional lens holding devices, the scope of use of lens systems using plus deck lenses can be expanded to n, 8.

%, in addition to the history N damping sheet, the l/lens cylinder (
= By forming a friction damping part in the J part -(, Jl'4 in t) Dimensional changes can be made more freely HψR (within a range that can accommodate the difference between the outer diameter of the lens and the inner diameter of the lens frame in terms of Hνd1 f゛1゛G, -, ?, "f: 'Next technology price It is possible to measure the operating temperature range of the lens system by +117°, which is close to +117°.

In addition, by applying the lens holding device of the present invention to the conventional method of fixing lenses, which are not limited to plastic lenses but are easily deformed due to temperature changes and lens fixing methods (using a presser foot, caulking, etc.), even after assembly, it can be used as a single item. J31 M+: Prevents the shape of the plus deck lens from changing due to temperature changes when used in the second embodiment. Effects of conventional lens retainer V? The comparison values with A0 are shown below. Table 1. (Change in shape r due to the lens holding device vt of the present invention)

[Brief explanation of the drawing]

Fig. 1 axe shows a conventional lens holding device Fj;
Figure a is a side sectional view, Figure 1 is an enlarged cross-sectional view of Figure 1 a, Figures 1 o and d show changes in the radius of curvature of the lens due to thermal fit and changes in the lens holding device in Figure 1 a. Theory 1
Figures ji1 and 1e are side sectional views showing a different embodiment from Figure 1a, and Figures 2 to 9 are 1 to 8 of the lens holding nails of the present invention.
An example is shown, and FIG. 2 shows the vertical side ifi+ of the first example.
'4, Fig. 3 a1 Figs.
Real 1st horror example of M positive in! Figure 9a is a longitudinal sectional side view of the lij'-8 embodiment, Figure 9 is a front view of the same, and Figure 3 is a perspective view of a modified 11ψ accommodation sleeve used in the second embodiment. 30...Mirror frame 31 Φ/lens leg attaching part 32...friction area '9 member 33/fist/lens fitting part 34.36 medium price - threaded part 35/@push ring 37/@@* g<, Depression Sheet 38... Metamorphosis 11! /Sleeve 39轡...Wood body 40#@plus deck lens 41...Step part 50...Radial modified J1ヂ1pH 51・@Φ thrust pot shape H': 52...Modified blown disc sleeve 53- ...Change engraving 1st stage storage part 54...9 Lens peripheral change Jhi absorption part 55...Book fitting part 56 tube--Self-deformation absorption lens 570@fist lens anchor 58--Foam layer 59, deformation Absorption rate 60φ...Notch 61...-Lens body A; ] Rack 62-...Radial deformation absorption rate 63...Lens suppression 7 lunge Patent applicant Olympus Optical Industry Co., Ltd.
- Fig. 1 (G) (b) Fig. 1 (C) Δ Fig. 1 (e) Fig. 3 (G)) (b) 51~' C U Fig. 4 Fig. 6 (.) Fig. 8 Written amendment to Figure 1 (voluntary) 1. Display of the incident Patent application No. 141956 of 1988 Name of the invention 2 Lens holding device 3, relationship with the person making the correction r/l Patent applicant fi Director and President, 2-43-2 Hatagaya, Shibuya-ku, Tokyo Shigeru Kitamura, Man 4, Agent 8 Contents of amendment (1) “Friction damping sheet 38” on page 16, line 4 of the specification
" has been corrected to read "friction damping sheet 31." (2) In the drawings, the corrections are made as shown in Figure 3a, Figure 4, Figure 7, Figure 8, and Figure 9 a'Y. 9 Inventory of documents with symbols (1) One copy of corrected drawings Figure 3 (G) (b) Figure 4 Figure 6

Claims (1)

[Scope of Claims] (+1) In a lens holding device for fixing a lens housed in a lens frame with a presser 311 &amp; A lens holding device fF'(0 (2 ) In a lens holding device 1a that fixes a lens housed in a lens frame with a holding ring, a means for absorbing dimensional changes in the 21' radial direction and/or thrust direction of the lens is provided, and Lens barrel surface and/
Alternatively, a lens holding device characterized in that it is configured by externally providing a friction reducing portion on the suppressing surface of the holding ring. (3) In a lens holding device for fixing a lens housed in a lens frame with a holding ring, a means for accommodating dimensional changes in the radial direction and/or thrust direction of the lens is provided and A friction reducing member is integrally provided on the lens barrel mounting surface and/or the suppressing surface of the holding ring, and between the contact surfaces between the lens and the lens barrel mounting surface of the lens frame or between the contact surfaces between the lens and the holding ring. A lens holding device characterized in that the lens holding device is constructed by interposing a friction damping sheet. (4) The means for absorbing dimensional changes in the radial direction of the lens is a deformable absorber 1 (with a Y-sleeve interposed between the inner periphery of the lens barrel and a radially deformable beam and a thrust eave-shaped beam). 1. The lens holding device according to item 1, item 2, or item 3. (5) The means for absorbing dimensional changes in the radial direction of the lens includes a radial deformation absorbing beam and a lens barrel on the inner periphery of the lens frame. A lens holding device according to claim 1, claim 2, or @3 gr2, which is provided with a material beam portion. (6) Means Lt for absorbing radial laminarization of the lens.
The lens holding equipment according to claim 1 and claim 2, wherein a radial deformation absorbing portion and a thrust deformation absorbing portion are provided on the pressing surface for the presser. (7) The radial direction of the lens changes A1:
lj to fIV - 1 step is the minimum circle of the lens 1)
Modification 14・t Il, which has a thin and thick deformation absorbing part.
A special t'1・i! disc sleeve is inserted between the inner periphery of the pure lens and one round of the lens. :'The first term of the search range,
The second η1 or ζ− is the lens i'd tj described in the third term.
Rlt￥. (=t' radial dimension of the 81nil lens is [1
゛・11'y, eye-catching Pguha, L4'l Ml: evening of the lens (1!A, there is a lens-shaped I cutting shadow 111 with a thickness that is brighter than the thickest part of the lens 1rI) The housing part and the lens periphery change 149'1. , Patent N: f-required range 1st
The lens holding device according to item 2m or item 3. (9) The means for absorbing dimensional changes in the radial direction of the lens is composed of a self-deforming absorbing lens provided with a foam layer on the outer periphery of the lens.
term, 21st υ or 3rd ear + iil,! The first lens holding device? 't. 00) Absorb the radial dimensional change of the lens = p
, 1=・month 1, the minimum distance between the lenses on the inner circumference of the lens frame +
r! Variation II9 with a thinner wall thickness
Lens holding device P0 (11) The friction damping portion 414 provided on the lens barrel mounting surface of the lens frame or the suppressing surface of the presser ring is provided by a double coloring method, coating, adhesion, etc. 1"W'l'R blue range 2nd Jl:j or the lens holding device described in item 3.
. (121) The means for absorbing dimensional changes in the radial direction of the lens includes inserting a friction damping sheet between the lens and the lens barrel attachment surface of the lens barrel, and adjusting the difference (clearance) between the lens barrel diameter and the lens barrel inner diameter. Claim 2 or 3 consisting of
Lens holding device as described in section.