JPH1123931A - Lens holding method - Google Patents
Lens holding methodInfo
- Publication number
- JPH1123931A JPH1123931A JP9183595A JP18359597A JPH1123931A JP H1123931 A JPH1123931 A JP H1123931A JP 9183595 A JP9183595 A JP 9183595A JP 18359597 A JP18359597 A JP 18359597A JP H1123931 A JPH1123931 A JP H1123931A
- Authority
- JP
- Japan
- Prior art keywords
- lens
- chamber
- optical axis
- hemisphere
- centering
- 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.)
- Pending
Links
Landscapes
- Lens Barrels (AREA)
- Microscoopes, Condenser (AREA)
- Lenses (AREA)
Abstract
(57)【要約】
【課題】 レンズ外径の心取加工および胴付面加工精度
等に左右されないレンズ保持方法を提供する。
【解決手段】 半球を超えるレンズをレンズ室に入れる
工程と、前記半球を超えるレンズを回転させることだけ
で心を出す工程と、心を出し終えた後、前記半球を超え
るレンズを固定する工程とを有する。
(57) [Problem] To provide a lens holding method which is not influenced by centering processing of a lens outer diameter, processing accuracy of a body surface, and the like. SOLUTION: A step of inserting a lens exceeding a hemisphere into a lens chamber, a step of centering just by rotating the lens exceeding the hemisphere, and a step of fixing the lens exceeding the hemisphere after centering is completed. Having.
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、レンズ保持方法に
関し、特に、顕微鏡用対物レンズを構成するレンズの保
持方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for holding a lens, and more particularly to a method for holding a lens constituting a microscope objective lens.
【０００２】[0002]
【従来技術】従来のレンズの保持方法は、レンズ枠を保
持するレンズ枠に、レンズを収納するレンズ室を形成し
ている。レンズ室は、レンズの外径に等しい内径とレン
ズの片面を当てるひっかかり部（以下、胴付面と呼ぶ）
とを有する。レンズは、レンズ室の内径およびレンズ室
の胴付面にレンズが接触するように嵌め込まれる。更
に、レンズをレンズ室に嵌め込んだ後、かしめまたはね
じ等を用いた押え環あるいは接着剤の手段で保持され
る。このとき、レンズは、レンズの光軸を基準に、レン
ズの光軸と平行になるように加工（以下、心取加工と呼
ぶ）されたレンズの外径により、レンズ室の半径方向
で、また、レンズ室の胴付面により、光軸方向で拘束、
保持されている。2. Description of the Related Art In a conventional lens holding method, a lens chamber for accommodating a lens is formed in a lens frame for holding a lens frame. The lens chamber has a catching portion (hereinafter, referred to as a body-attached surface) for contacting an inner diameter equal to the outer diameter of the lens with one surface of the lens.
And The lens is fitted so that the lens comes into contact with the inner diameter of the lens chamber and the body-attached surface of the lens chamber. Further, after the lens is fitted into the lens chamber, the lens is held by means of a press ring using a caulking or screw or an adhesive. At this time, the lens is processed in a radial direction of the lens chamber by an outer diameter of the lens processed (hereinafter, referred to as centering processing) so as to be parallel to the optical axis of the lens with respect to the optical axis of the lens. , Constrained in the optical axis direction by the body surface of the lens chamber,
Is held.
【０００３】従来の顕微鏡用対物レンズの保持方法を図
３を用いて説明する。先ず、レンズ２１の外径２３は、
研磨面２２および研磨面２４の曲率中心を結ぶ光軸に平
行になるように加工される。一方、レンズ保持枠２５の
レンズ室２６は、レンズの外径２３に合わせて内径加工
が施され、胴付面２７および有効径２８の同時（同軸）
加工が行われる。A conventional method for holding a microscope objective lens will be described with reference to FIG. First, the outer diameter 23 of the lens 21 is
It is processed so as to be parallel to the optical axis connecting the centers of curvature of the polishing surfaces 22 and 24. On the other hand, the lens chamber 26 of the lens holding frame 25 is subjected to inner diameter processing in accordance with the outer diameter 23 of the lens, so that the barrel surface 27 and the effective diameter 28 are simultaneously (coaxial).
Processing is performed.
【０００４】レンズ２１およびレンズ室２６の加工が終
わった後、レンズ２１をレンズ室２６に嵌合させ、胴付
面２７に押し当てながら、かしめ部２９をレンズ中心側
に曲げ、レンズ２１を保持している。図４は、押え環に
よりレンズを保持する従来例を示す図である。ねじ３５
をもった押え環３６は、レンズ３１をレンズ保持枠３４
のレンズ室３３の内径に沿って胴付面３２に押し当て保
持している。また、図５は、接着剤によりレンズを保持
する従来例を示す図である。レンズ４１は、レンズ保持
枠４４のレンズ室４３の内径に沿って胴付面４２に押し
当て嵌め込まれた後、接着剤４５によって保持されてい
る。After the processing of the lens 21 and the lens chamber 26 is completed, the lens 21 is fitted into the lens chamber 26 and the swaged portion 29 is bent toward the center of the lens while being pressed against the body surface 27 to hold the lens 21. doing. FIG. 4 is a view showing a conventional example in which a lens is held by a holding ring. Screw 35
The holding ring 36 holding the lens 31 holds the lens 31
Of the lens chamber 33 along the inner diameter of the lens chamber 33. FIG. 5 is a diagram showing a conventional example in which a lens is held by an adhesive. The lens 41 is pressed and fitted along the inner diameter of the lens chamber 43 of the lens holding frame 44 onto the body-attached surface 42, and then held by the adhesive 45.
【０００５】[0005]
【発明が解決しようとする課題】しかしながら、上記の
ような従来のレンズ保持方法では、基本的に心取された
レンズをレンズ外径に合わせたレンズ室に嵌め込むた
め、レンズ室内径とレンズ外径との間隙、すなわち、は
めあい公差の大きさが問題となっていた。特に、焦点距
離の短いレンズでは、所定のレンズ室内径寸法に対し
て、レンズ側にはめあい公差を小さくする高精度の外径
寸法加工が必要であった。この外径加工は、レンズの外
径が間接的にレンズの光軸と等価となるため、レンズ心
取加工機によりレンズの光軸を観察しながら慎重に行わ
れる。しかし、心取加工精度には限界があり、加工公差
を小さくできなかつた。すなわち、レンズの外径公差が
大きくなると、レンズを収納するレンズ室内径が、あら
かじめレンズ外径の最大寸法に合わせて大きくならざる
を得なく、その結果、外径寸法のより小さいレンズをレ
ンズ室に嵌合させると、レンズとレンズ室の隙間が増
え、光軸精度を悪くしていた。However, in the above-described conventional lens holding method, the centered lens is basically fitted into the lens chamber corresponding to the lens outer diameter. The gap with the diameter, that is, the size of the fitting tolerance has been a problem. In particular, in the case of a lens having a short focal length, a high-precision processing of the outer diameter is required to reduce the tolerance of fitting to the lens side for a predetermined inner diameter of the lens. Since the outer diameter of the lens is indirectly equivalent to the optical axis of the lens, this outer diameter processing is carefully performed while observing the optical axis of the lens by a lens centering machine. However, there is a limit to the centering accuracy, and the machining tolerance cannot be reduced. That is, when the outer diameter tolerance of the lens increases, the inside diameter of the lens housing the lens must be increased in advance according to the maximum size of the outer diameter of the lens. When this is fitted to the lens, the gap between the lens and the lens chamber increases, and the accuracy of the optical axis is deteriorated.
【０００６】さらに、図４に示すように、高開口数の物
体側レンズにおいては、レンズの光軸偏心および光軸の
傾斜を極力小さくするため、レンズ保持枠３４の外径３
７とレンズ室３３の内径を同時で、かつ高精度加工する
必要があり、さらにレンズ室３３の胴付面３２と接触す
るレンズ面に、光軸と垂直をなす直角度の高い胴付面加
工を施す必要がある。このように、心取加工および胴付
面加工の加工精度で決まる光軸精度が、レンズ３１をレ
ンズ室３３に嵌め込んだ後、ほとんど修正できず、その
ため不良率が高く、結像性能が低下するという問題があ
った。Further, as shown in FIG. 4, in an object-side lens having a high numerical aperture, the outer diameter of the lens holding frame 34 is reduced to minimize the eccentricity of the optical axis and the inclination of the optical axis.
7 and the inner diameter of the lens chamber 33 need to be processed at the same time and with high precision. Further, the lens surface in contact with the torso surface 32 of the lens chamber 33 has a higher torsion perpendicular to the optical axis. Need to be applied. As described above, the optical axis accuracy determined by the processing accuracy of the centering processing and the body surface processing can hardly be corrected after the lens 31 is fitted into the lens chamber 33, so that the defect rate is high and the imaging performance is deteriorated. There was a problem of doing.
【０００７】本発明では、上記問題点を解決するため
に、レンズ外径の心取加工および胴付面加工精度等に左
右されないレンズ保持方法を提供することを目的とす
る。An object of the present invention is to provide a method of holding a lens which is not influenced by the centering of the outer diameter of the lens and the processing accuracy of the body surface in order to solve the above problems.
【０００８】[0008]
【課題を解決するための手段】上記目的のために本発明
は、半球を超えるレンズをレンズ室に入れる工程と、前
記半球を超えるレンズを回転させることだけで心を出す
工程と、心を出し終えた後、前記半球を超えるレンズを
固定する工程とを有する。また、前記半球を超えるレン
ズは、胴付面に接触したまま回転させられることが望ま
しい。更に、前記半球を超えるレンズを前記レンズ室に
固定する工程において、かしめ、押え環または接着剤を
用いることが望ましい。尚、本発明における「半球を超
える」とは、球の中心角が１８０゜を超えるものを指す
ものとする。SUMMARY OF THE INVENTION To achieve the above object, the present invention provides a method for placing a lens exceeding a hemisphere into a lens chamber, a step for centering by simply rotating the lens exceeding the hemisphere, and a step for centering. Fixing the lens beyond the hemisphere after finishing. Further, it is desirable that the lens exceeding the hemisphere is rotated while being in contact with the body surface. Further, in the step of fixing the lens exceeding the hemisphere to the lens chamber, it is desirable to use a caulking, a press ring or an adhesive. In the present invention, “beyond a hemisphere” means that the central angle of the sphere exceeds 180 °.
【０００９】[0009]
【発明の実施の形態】本発明では、レンズの形状を半球
を超える物体側に凹面を向けたメニスカスレンズとし、
該凸面部分の外径（直径）をレンズ保持枠のレンズ室内
径と胴付面とに接触、保持させるので、メニスカスレン
ズの研磨された外径がそのまま光軸の基準となる。従っ
て、従来のレンズのように、レンズの光軸精度を左右す
る心取された外径を必要としない。すなわち、光軸の基
準となるメニスカレンズ自身の外径の心取加工が不要と
なる。DESCRIPTION OF THE PREFERRED EMBODIMENTS In the present invention, a lens is formed as a meniscus lens having a concave surface facing the object side exceeding a hemisphere,
Since the outer diameter (diameter) of the convex portion is brought into contact with and held by the inside diameter of the lens holding frame and the body-attached surface, the polished outer diameter of the meniscus lens directly serves as a reference for the optical axis. Therefore, unlike the conventional lens, a centered outer diameter which affects the optical axis accuracy of the lens is not required. That is, centering of the outer diameter of the meniscus lens itself, which is a reference for the optical axis, becomes unnecessary.
【００１０】一方、メニスカスレンズをレンズ枠に形成
されたレンズ室に嵌合させた状態では、メニスカスレン
ズの凸面の曲率中心と凹面の曲率中心とは同一光軸上に
あり、凸面の曲率中心がレンズ保持枠のレンズ室内径の
軸上にあるので、メニスカスレンズの凸面の曲率中心を
レンズの回転中心と定め、他方の凹面の曲率中心をレン
ズ保持枠のレンズ室内径の軸上に来るようにメニスカス
レンズを回転し、調整することにより、メニスカスレン
ズの光軸は、高精度に研磨された面を基準に、レンズ室
の内径軸と一致してレンズ保持枠に保持されることにな
る。On the other hand, when the meniscus lens is fitted into the lens chamber formed in the lens frame, the center of curvature of the convex surface and the center of curvature of the concave surface of the meniscus lens are on the same optical axis, and the center of curvature of the convex surface is Since the center of curvature of the convex surface of the meniscus lens is defined as the center of rotation of the lens, and the center of curvature of the other concave surface is on the axis of the lens indoor diameter of the lens holding frame. By rotating and adjusting the meniscus lens, the optical axis of the meniscus lens is held by the lens holding frame in accordance with the inner diameter axis of the lens chamber with reference to the highly polished surface.
【００１１】[0011]
【実施例】本発明によるレンズ保持方法を適用した第一
の実施例を図１を用いて説明する。本実施例において、
レンズ保持枠１は、レンズ室２および胴付面３を有し、
レンズ室２の円筒状内径は、メニスカスレンズ６の凸面
７の外径に合わせられ、所定のはめあい公差となるよう
に、レンズ保持枠１の外径４と同時に同軸加工を施され
る。次に、半球を超える凸面７と凹面８とを有するメニ
スカスレンズ６は、レンズ室２に紙面上左方から胴付面
３に接触するように嵌め込まれた後、光軸調整を行いな
がら切欠部５に接着剤を封入し、光軸方向の移動を拘束
することでレンズ保持枠１に安定に保持される。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment to which a lens holding method according to the present invention is applied will be described with reference to FIG. In this embodiment,
The lens holding frame 1 has a lens chamber 2 and a body surface 3,
The cylindrical inner diameter of the lens chamber 2 is adjusted to the outer diameter of the convex surface 7 of the meniscus lens 6, and is coaxially processed simultaneously with the outer diameter 4 of the lens holding frame 1 so as to have a predetermined fit tolerance. Next, the meniscus lens 6 having a convex surface 7 and a concave surface 8 exceeding a hemisphere is fitted into the lens chamber 2 from the left side on the paper surface so as to contact the body surface 3, and then the notch is formed while adjusting the optical axis. An adhesive is sealed in the lens holder 5 and the movement in the optical axis direction is restrained, whereby the lens holder 5 is stably held on the lens holding frame 1.
【００１２】メニスカスレンズ６の光軸調整、すなわち
光軸の心出は、切欠部５に接着剤を封入する際に行われ
る。メニスカスレンズ６の凸面７の曲率中心Ｏ1を回転
中心と定め、メニスカスレンズ６を凸面７の曲率中心Ｏ
1を中心に回転させる。そのとき、凹面８の曲率中心Ｏ2
がレンズ室２の内径の軸上に来るように調整すれば、メ
ニスカスレンズ６の光軸は、レンズ室２の内径の軸と一
致する。従って、メニスカスレンズ６は、レンズ室２の
内径とレンズ保持枠１の外径４とは同軸であるから、レ
ンズ保持枠１の軸上に保持される。The adjustment of the optical axis of the meniscus lens 6, that is, the centering of the optical axis, is performed when the adhesive is sealed in the notch 5. The center of curvature O 1 of the convex surface 7 of the meniscus lens 6 is determined as the center of rotation, and the meniscus lens 6 is defined as the center of curvature O of the convex surface 7.
Rotate around 1 At that time, the center of curvature O 2 of the concave surface 8
Is adjusted on the axis of the inner diameter of the lens chamber 2, the optical axis of the meniscus lens 6 coincides with the axis of the inner diameter of the lens chamber 2. Therefore, the meniscus lens 6 is held on the axis of the lens holding frame 1 because the inner diameter of the lens chamber 2 and the outer diameter 4 of the lens holding frame 1 are coaxial.
【００１３】つづけて、本発明によるレンズ保持方法を
適用した第二の実施例を図２を用いて説明する。本実施
例において、レンズ保持枠１１は、内径が球形のレンズ
室１２を有する。レンズ室１２の内径は、メニスカスレ
ンズ１６の凸面１７の外径に合わせ、所定のはめあい公
差となるように、レンズ保持枠１１の外径１４と同時に
同軸加工を施される。半球を超える凸面１７と凹面１８
とを有するメニスカスレンズ１６は、レンズ室１２に紙
面上右方から嵌め込まれた後、光軸調整を行いながら切
欠部１５に接着剤を封入し固定される。レンズ室１２は
球形であるので、メニスカスレンズ１６は、光軸方向お
よびそれに直交する半径方向にも同時に移動が拘束さ
れ、レンズ保持枠１１に安定に保持される。Next, a second embodiment to which the lens holding method according to the present invention is applied will be described with reference to FIG. In this embodiment, the lens holding frame 11 has a lens chamber 12 having a spherical inner diameter. The inner diameter of the lens chamber 12 is adjusted to the outer diameter of the convex surface 17 of the meniscus lens 16 and is coaxially processed simultaneously with the outer diameter 14 of the lens holding frame 11 so as to have a predetermined fitting tolerance. Convex surface 17 and concave surface 18 beyond hemisphere
After being fitted into the lens chamber 12 from the right side on the paper surface, the meniscus lens 16 having the above is fixed to the cutout portion 15 by enclosing an adhesive while adjusting the optical axis. Since the lens chamber 12 is spherical, the movement of the meniscus lens 16 is simultaneously restricted in the optical axis direction and in the radial direction perpendicular thereto, and the meniscus lens 16 is stably held by the lens holding frame 11.
【００１４】メニスカスレンズ１６の光軸調整、すなわ
ち光軸の心出しは、本発明によるレンズ保持方法を適用
した第一の実施例と同様であるため説明を省略する。な
お、上記第一および第二の実施例のメニスカスレンズ
は、半球を超える凸面を有する顕微鏡用対物レンズに適
している。メニスカスレンズの凸面の曲率は、十分強い
ことが必要であり、物体側開口数が０．８５以上が望ま
しい。The adjustment of the optical axis of the meniscus lens 16, that is, the centering of the optical axis, is the same as that of the first embodiment to which the lens holding method according to the present invention is applied, and thus the description thereof is omitted. The meniscus lenses of the first and second embodiments are suitable for a microscope objective having a convex surface exceeding a hemisphere. The curvature of the convex surface of the meniscus lens needs to be sufficiently strong, and the object-side numerical aperture is desirably 0.85 or more.
【００１５】以上のように本発明によれば、レンズの形
状を見直すことにより、従来のような高精度の心取加工
および胴付面加工を不要とするばかりでなく、心取加工
および胴付面加工の加工精度に左右されないので、良品
率を高め、かつ安価で、光軸精度の高いレンズ保持が可
能となる。As described above, according to the present invention, by revising the shape of the lens, not only the conventional high-precision centering processing and body surface processing as in the related art are unnecessary, but also the centering processing and body mounting Since it is not affected by the processing accuracy of the surface processing, a non-defective product ratio can be increased, the lens can be held at a low cost, and the optical axis accuracy is high.
【００１６】[0016]
【発明の効果】以上のように本発明によれば、心取加工
および胴付面加工の加工精度に左右されないレンズ保持
方法を提供するという目的が達成された。As described above, according to the present invention, the object of providing a lens holding method which is not affected by the processing accuracy of the centering processing and the body surface processing is achieved.
【図１】図１は、本発明によるレンズ保持方法を適用し
た第一の実施例を示すレンズ保持枠の断面図である。FIG. 1 is a sectional view of a lens holding frame showing a first embodiment to which a lens holding method according to the present invention is applied.
【図２】図２は、本発明によるレンズ保持方法を適用し
た第二の実施例を示すレンズ保持枠の断面図である。FIG. 2 is a sectional view of a lens holding frame showing a second embodiment to which the lens holding method according to the present invention is applied.
【図３】図３は、従来のレンズ保持方法を示す第一の例
の断面図である。FIG. 3 is a sectional view of a first example showing a conventional lens holding method.
【図４】図４は、従来のレンズ保持方法を示す第二の例
の断面図である。FIG. 4 is a sectional view of a second example showing a conventional lens holding method.
【図５】図５は、従来のレンズ保持方法を示す第三の例
の断面図である。FIG. 5 is a sectional view of a third example showing a conventional lens holding method.
１・・・レンズ保持枠 ２・・・レンズ室 ３・・・胴付面 ５・・・切欠 ６・・・半球を超えるメニスカスレンズ ９・・・接着剤 Ｏ1・・・凸面７の曲率中心 Ｏ2・・・凹面８の曲率中心Center of curvature of 1 ... lens holding frame 2 ... lens chamber 3 ... meniscus lens exceeds cylinder with surface 5 ... notch 6 ... hemisphere 9 ... adhesive O 1 ... convex surface 7 O 2 ··· The center of curvature of the concave surface 8
Claims (3)
工程と、前記半球を超えるレンズを回転させることだけ
で心を出す工程と、心を出し終えた後、前記半球を超え
るレンズを固定する工程とを有することを特徴とするレ
ンズ保持方法。1. A step of inserting a lens exceeding a hemisphere into a lens chamber, a step of centering by merely rotating the lens exceeding the hemisphere, and a step of fixing the lens exceeding the hemisphere after centering is completed. And a lens holding method.
触したまま回転させられることを特徴とする請求項１に
記載のレンズ保持方法。2. The lens holding method according to claim 1, wherein the lens exceeding the hemisphere is rotated while being in contact with a body surface.
に固定する工程において、かしめ、押え環または接着剤
を用いることを特徴とする請求項１または２に記載のレ
ンズ保持方法。3. The lens holding method according to claim 1, wherein in the step of fixing the lens exceeding the hemisphere to the lens chamber, a caulking, a press ring, or an adhesive is used.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9183595A JPH1123931A (en) | 1997-07-09 | 1997-07-09 | Lens holding method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9183595A JPH1123931A (en) | 1997-07-09 | 1997-07-09 | Lens holding method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH1123931A true JPH1123931A (en) | 1999-01-29 |
Family
ID=16138576
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9183595A Pending JPH1123931A (en) | 1997-07-09 | 1997-07-09 | Lens holding method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH1123931A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006350372A (en) * | 2006-07-24 | 2006-12-28 | Fujitsu Ltd | The camera module |
| JP2007333999A (en) * | 2006-06-15 | 2007-12-27 | Hitachi Maxell Ltd | Lens unit |
| JP2010054676A (en) * | 2008-08-27 | 2010-03-11 | Konica Minolta Opto Inc | Lens assembling method |
| JP2014003258A (en) * | 2012-06-21 | 2014-01-09 | Hitachi Automotive Systems Ltd | Semiconductor device and manufacturing method of the same |
| JP2016194660A (en) * | 2015-04-01 | 2016-11-17 | オリンパス株式会社 | Microscope objective lens, and assembly method of microscope objective lens |
| WO2020183622A1 (en) * | 2019-03-12 | 2020-09-17 | オリンパス株式会社 | Optical system and optical device provided with same |
-
1997
- 1997-07-09 JP JP9183595A patent/JPH1123931A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007333999A (en) * | 2006-06-15 | 2007-12-27 | Hitachi Maxell Ltd | Lens unit |
| JP2006350372A (en) * | 2006-07-24 | 2006-12-28 | Fujitsu Ltd | The camera module |
| JP2010054676A (en) * | 2008-08-27 | 2010-03-11 | Konica Minolta Opto Inc | Lens assembling method |
| JP2014003258A (en) * | 2012-06-21 | 2014-01-09 | Hitachi Automotive Systems Ltd | Semiconductor device and manufacturing method of the same |
| JP2016194660A (en) * | 2015-04-01 | 2016-11-17 | オリンパス株式会社 | Microscope objective lens, and assembly method of microscope objective lens |
| WO2020183622A1 (en) * | 2019-03-12 | 2020-09-17 | オリンパス株式会社 | Optical system and optical device provided with same |
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