JPH0532731B2 - - Google Patents
Info
- Publication number
- JPH0532731B2 JPH0532731B2 JP60226195A JP22619585A JPH0532731B2 JP H0532731 B2 JPH0532731 B2 JP H0532731B2 JP 60226195 A JP60226195 A JP 60226195A JP 22619585 A JP22619585 A JP 22619585A JP H0532731 B2 JPH0532731 B2 JP H0532731B2
- Authority
- JP
- Japan
- Prior art keywords
- lens
- frame
- elastic member
- fitting
- optical axis
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 230000000630 rising effect Effects 0.000 claims description 4
- 230000003287 optical effect Effects 0.000 description 10
- 239000000463 material Substances 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 239000011347 resin Substances 0.000 description 4
- 229920005989 resin Polymers 0.000 description 4
- 230000008602 contraction Effects 0.000 description 3
- 230000006378 damage Effects 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 239000004925 Acrylic resin Substances 0.000 description 1
- 229920000178 Acrylic resin Polymers 0.000 description 1
- 241000052343 Dares Species 0.000 description 1
- 239000000872 buffer Substances 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 229920003229 poly(methyl methacrylate) Polymers 0.000 description 1
- 239000004926 polymethyl methacrylate Substances 0.000 description 1
Description
【発明の詳細な説明】
［産業上の利用分野］
本発明はレンズ鏡枠（レンズ鏡胴も含む）にレ
ンズを保持するようにしたレンズ構体に関するも
のである。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a lens structure in which a lens is held in a lens barrel (including a lens barrel).
［従来の技術］
従来、レンズの鏡枠への嵌合方法としては、指
定された嵌合公差に従つてレンズを鏡枠（又は鏡
胴）の指定位置に嵌合させ、ネジやスプリング、
或いは押え枠を用いて光軸方向に締め付けること
によつてレンズを固定していた。レンズが樹脂材
を用いた場合や、精度の厳しいレンズの鏡枠への
固定には、押え枠を用いての締め付け圧力によつ
てレンズ面の歪が生じることとなつた。レンズ面
の歪を防止するために光軸方向に弾性部材をはさ
んだり、バネ性の押え枠によつてレンズ固定圧が
１カ所に集中しないようにする配慮がみられた
が、径方向の圧力に対するレンズ面の歪を防止す
る配慮はなされていなかつた。[Prior Art] Conventionally, as a method for fitting a lens to a lens frame, the lens is fitted to a specified position on the lens frame (or lens barrel) according to a specified fitting tolerance, and screws, springs, etc.
Alternatively, the lens is fixed by tightening it in the optical axis direction using a presser frame. When a lens is made of a resin material, or when a lens is fixed to a lens frame with strict precision, the tightening pressure using a presser frame causes distortion of the lens surface. In order to prevent distortion of the lens surface, efforts were made to prevent the lens fixing pressure from being concentrated in one place by inserting an elastic member in the optical axis direction and using a spring-like holding frame, but the radial direction No consideration was given to preventing distortion of the lens surface due to pressure.
上記の従来技術によるときは、鏡枠とレンズと
の材質の違いにより、或いは環境の変化等によつ
てレンズと鏡枠との嵌合状態が変つた場合、この
影響を緩和することができないという欠点があつ
た。例えば鏡枠とレンズとの嵌合が厳しい場合、
之を低温環境におくと金属又は樹脂でできた鏡枠
とレンズの硝材との熱膨張率の相違によりレンズ
が鏡枠によつて締め付けられ、レンズ面の変形、
場合によつてはレンズの破壊が生じる。また鏡枠
が金属又は吸水率の低い樹脂でできており、レン
ズがPMMA（アクリル系樹脂の１種）のような吸
水率の高く吸水膨張率の大きな樹脂でできている
場合、これを高湿の環境におくとレンズは膨潤し
て相対的にレンズは鏡枠に締めつけられ、レンズ
面の変形を起こし、最悪の場合には鏡枠又はレン
ズの永久歪あるいは破壊が発生する。この対策と
してレンズと鏡枠との嵌合をリブのような線接触
で５〜８点で支持するようにし、鏡枠が変形する
ことによつてレンズの膨張を吸収する方が見受け
られるが、この方法によつてもレンズ外周径の変
化が大きいと、レンズは５〜８角形に変形するた
め、レンズの永久歪や破壊を防止することはでき
ても、レンズ面の変形を基本的に防止することは
できない。 When using the above-mentioned conventional technology, if the fitting state of the lens and the lens frame changes due to a difference in the materials of the lens and the lens, or due to changes in the environment, this effect cannot be alleviated. There were flaws. For example, if the fit between the mirror frame and lens is difficult,
If the lens is placed in a low-temperature environment, the lens will be tightened by the lens frame due to the difference in thermal expansion coefficient between the lens frame made of metal or resin and the glass material of the lens, causing deformation of the lens surface.
In some cases, destruction of the lens occurs. In addition, if the lens frame is made of metal or resin with low water absorption, and the lens is made of resin with high water absorption and expansion coefficient, such as PMMA (a type of acrylic resin), the lens may be exposed to high humidity. If the lens is left in an environment of As a countermeasure to this problem, it seems that the fitting between the lens and the lens frame is supported at 5 to 8 points by line contact such as ribs, and the expansion of the lens is absorbed by deforming the lens frame. Even with this method, if there is a large change in the lens outer diameter, the lens will deform into a pentagonal or octagonal shape, so although permanent distortion and destruction of the lens can be prevented, it basically prevents deformation of the lens surface. I can't.
またレンズ又は鏡枠の膨縮による嵌合状態の変
化を避けるために嵌合公差を大きくとると膨縮の
ない状態では嵌合がゆるいため、レンズが光軸に
対して偏心したり不安定となる可能性があり、こ
のような従来技術によるレンズ固定法はレンズと
鏡枠との間で膨縮の生じ易いレンズ構体に対して
は好ましくない。 In addition, if a large fitting tolerance is set to avoid changes in the fitting condition due to expansion and contraction of the lens or lens frame, the fitting will be loose in the absence of expansion and contraction, which may cause the lens to become eccentric with respect to the optical axis or become unstable. Therefore, such a conventional lens fixing method is not preferable for a lens structure in which expansion and contraction are likely to occur between the lens and the lens frame.
［発明が解決しようとする問題点］
本発明はレンズと鏡枠との嵌合部において、径
方向の嵌合状態の変化をレンズが偏芯することな
く緩衝し、鏡枠やレンズ面の歪、破壊を防止する
ようにしたレンズ構体を提供することを目的とす
る。[Problems to be Solved by the Invention] The present invention buffers changes in the fitting state in the radial direction at the fitting portion between the lens and the lens frame without causing eccentricity of the lens, and prevents distortion of the lens frame or lens surface. , an object of the present invention is to provide a lens structure that prevents breakage.
［問題点を解決するための手段］
上記目的は本発明のレンズの径方向外周部と鏡
枠内面との間に、帯状のリングに切り欠きを有し
ていて、その立ち上がり部が交互に鏡枠側嵌合部
とレンズ側嵌合部とを形成する形状の板バネの弾
性部材を設けて、レンズを鏡枠に保持することを
特徴とするレンズ構体によつて達成される。[Means for Solving the Problems] The above objective is to provide a belt-shaped ring with a notch between the radial outer circumferential portion of the lens of the present invention and the inner surface of the lens frame, and the rising portions of the ring are alternately shaped like a mirror. This is achieved by a lens structure that holds the lens on the lens frame by providing an elastic member of a leaf spring shaped to form a frame side fitting part and a lens side fitting part.
［作用］
本発明はあえてレンズの径方向の外周部に弾性
部材を設けることが、レンズの光軸を狂わせたり
することで好ましくないとする固定した概念に挑
戦し、特にプラスチツクレンズが多用され金属鏡
枠への保持がなされるようになつて来た現在、環
境変化に基ずくレンズと鏡枠との間での膨張係数
の相違による歪を弾性部材によつて吸収させるよ
うにしたもので、レンズの永久歪や破壊を防止し
ながら光軸方向の偏りに対してはレンズ外周部に
設ける弾性部材を対称的或いは均等に配置するこ
とによつて解決した。そして従来の膨張係数等を
考慮して設けたガタによる光軸方向の偏りより
も、本発明の実施例によつて遥かに良好なレンズ
保持がなされ正しい光軸が保たれることを確認し
た。[Function] The present invention dares to challenge the fixed concept that it is undesirable to provide an elastic member on the outer periphery of a lens in the radial direction because it disturbs the optical axis of the lens. Nowadays, lenses are being held in the lens frame, and the elastic member absorbs the strain caused by the difference in expansion coefficient between the lens and the lens frame due to environmental changes. The deviation in the optical axis direction was solved by symmetrically or evenly arranging the elastic members provided on the outer periphery of the lens while preventing permanent distortion and destruction of the lens. It was also confirmed that the lens can be held much better in the embodiments of the present invention, and the correct optical axis can be maintained, compared to the conventional deviation in the optical axis direction due to backlash, which is provided in consideration of the expansion coefficient and the like.
［実施例］
以下、本発明の実施例について、図面によつて
説明を行う。[Examples] Examples of the present invention will be described below with reference to the drawings.
第１図は本発明の実施例のレンズ構体の断面図
を示したもので、鏡枠２１とレンズ２２との間の
嵌合部に第２図に示すような付勢された板バネか
らなる弾性部材２３を挿入し、その間の半径方向
のガタを吸収して保持し、光軸方向には止めネジ
２４によつて固定したものである。 FIG. 1 shows a cross-sectional view of a lens structure according to an embodiment of the present invention, and the fitting portion between the lens frame 21 and the lens 22 is made of a biased leaf spring as shown in FIG. An elastic member 23 is inserted to absorb and hold the radial play therebetween, and is fixed in the optical axis direction with a set screw 24.
第２図ａ，ｂに示す弾性部材２３は、リング状
をなす付勢された板バネ材料を弾性部材とする実
施例であつて、一重の帯状のリングに軸方向の切
り欠き２３１を設け、その立ち上がり部２３２が
交互に折曲げ付勢されていて、鏡枠側嵌合部とレ
ンズ側嵌合部とを形成するような形状としたもの
である。 The elastic member 23 shown in FIGS. 2a and 2b is an embodiment in which a ring-shaped biased plate spring material is used as the elastic member, and an axial notch 231 is provided in a single band-shaped ring. The rising portions 232 are alternately bent and biased to form a lens frame side fitting portion and a lens side fitting portion.
弾性部材２３はリング状をしていて、レンズ２
２を鏡枠２１に対して中心位置に光軸が合致する
ように保持している。勿論弾性部材２３はリング
状の一部を切り欠いて円弧状として保持すること
も可能であるが、このような保持方法では光軸を
正しく保持することは不安定となる恐れが生じ
る。 The elastic member 23 is ring-shaped and
2 is held with respect to the lens frame 21 so that its optical axis coincides with the center position. Of course, the elastic member 23 can be held in an arc shape by cutting out a part of the ring shape, but with such a holding method, it may become unstable to hold the optical axis correctly.
［発明の効果］
本発明によつて従来、宿命とされていた鏡枠内
径とレンズ外径との嵌合の問題を解消し、特にレ
ンズと鏡枠との熱や湿度による膨張係数の差が大
きい時に発生する問題、すなわち保持されたレン
ズの偏芯やレンズ面の歪、レンズの破壊等の問題
をなくしたもので、特に環境の変化の厳しい条件
での使用に耐えるレンズ構体が、提供されること
となつた。[Effects of the Invention] The present invention solves the problem of fitting between the inner diameter of the lens frame and the outer diameter of the lens, which was considered to be a fate in the past, and in particular, eliminates the difference in expansion coefficient due to heat and humidity between the lens and the lens frame. This eliminates the problems that occur when the lens is large, such as eccentricity of the held lens, distortion of the lens surface, and lens breakage, and provides a lens structure that can withstand use under particularly severe conditions of environmental changes. It has become a thing.
第１図は本発明の実施例を示すレンズ構体断面
図、第２図は本発明の弾性体を示し、ａは斜視
図、ｂは正面図を示す。
２１……鏡枠、２２……レンズ、２３……弾性
部材、２３１……切り欠き、２３２……立ち上り
部。
FIG. 1 is a sectional view of a lens structure showing an embodiment of the present invention, and FIG. 2 is a view showing an elastic body of the present invention, in which a is a perspective view and b is a front view. 21...Mirror frame, 22...Lens, 23...Elastic member, 231...Notch, 232...Rising portion.
Claims (1)
帯状のリングに切り欠きを有していて、その立ち
上がり部が交互に鏡枠側嵌合部とレンズ側嵌合部
とを形成する形状の板バネの弾性部材を設けて、
レンズを鏡枠に保持することを特徴とするレンズ
構体。1 Between the radial outer circumference of the lens and the inner surface of the lens frame,
A plate spring elastic member is provided in which a band-shaped ring has a notch and the rising portions thereof alternately form a lens frame side fitting part and a lens side fitting part,
A lens structure characterized by holding a lens in a mirror frame.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22619585A JPS6286315A (en) | 1985-10-11 | 1985-10-11 | Lens structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22619585A JPS6286315A (en) | 1985-10-11 | 1985-10-11 | Lens structure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6286315A JPS6286315A (en) | 1987-04-20 |
| JPH0532731B2 true JPH0532731B2 (en) | 1993-05-17 |
Family
ID=16841374
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP22619585A Granted JPS6286315A (en) | 1985-10-11 | 1985-10-11 | Lens structure |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6286315A (en) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5671088A (en) * | 1992-06-03 | 1997-09-23 | Leupold & Stevens, Inc. | Variable optical aiming devices |
| JP2005191204A (en) * | 2003-12-25 | 2005-07-14 | Kyocera Corp | Optical element assembling body, assembling method, and electron beam apparatus using the same |
| WO2008066074A1 (en) * | 2006-11-28 | 2008-06-05 | Kyocera Corporation | Optical device and optical transmitter/receiver |
| JP2010224487A (en) * | 2009-03-25 | 2010-10-07 | Nikon Corp | Optical apparatus |
| DE102013109263B4 (en) * | 2013-08-27 | 2016-04-21 | Jos. Schneider Optische Werke Gmbh | Socket for an optical element, optical system and use of a radially resilient ring |
| EP2887111B1 (en) * | 2013-12-20 | 2017-12-13 | Axis AB | Lens holder |
| JP6936216B2 (en) * | 2016-03-29 | 2021-09-15 | 天津欧菲光電有限公司Ｔｉａｎｊｉｎ Ｏｆｉｌｍ Ｏｐｔｏ Ｅｌｅｃｔｒｏｎｉｃｓ Ｃｏ．， Ｌｔｄ | Lens unit |
| JP6881248B2 (en) | 2017-11-14 | 2021-06-02 | 日亜化学工業株式会社 | Optical member holding device, manufacturing method of optical member holding device and semiconductor laser device |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5941312B2 (en) * | 1980-10-17 | 1984-10-05 | 株式会社東芝 | oxide piezoelectric material |
| JPS59228614A (en) * | 1983-06-10 | 1984-12-22 | Ricoh Co Ltd | Lens assembling method |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5941312U (en) * | 1982-09-06 | 1984-03-16 | ミノルタ株式会社 | lens holding frame |
| JPS59194711U (en) * | 1983-06-13 | 1984-12-25 | コニカ株式会社 | Optical element retention mechanism |
-
1985
- 1985-10-11 JP JP22619585A patent/JPS6286315A/en active Granted
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5941312B2 (en) * | 1980-10-17 | 1984-10-05 | 株式会社東芝 | oxide piezoelectric material |
| JPS59228614A (en) * | 1983-06-10 | 1984-12-22 | Ricoh Co Ltd | Lens assembling method |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6286315A (en) | 1987-04-20 |
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