JPH0627393A - Observation device - Google Patents
Observation deviceInfo
- Publication number
- JPH0627393A JPH0627393A JP4200190A JP20019092A JPH0627393A JP H0627393 A JPH0627393 A JP H0627393A JP 4200190 A JP4200190 A JP 4200190A JP 20019092 A JP20019092 A JP 20019092A JP H0627393 A JPH0627393 A JP H0627393A
- Authority
- JP
- Japan
- Prior art keywords
- main body
- lens
- tube
- diameter cylindrical
- cylindrical portion
- 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
- Instruments For Viewing The Inside Of Hollow Bodies (AREA)
- Endoscopes (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、小型のビデオカメラや
内視鏡等に適用して好適な観察装置に関するものであ
る。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an observation device suitable for application to small video cameras, endoscopes and the like.
【０００２】[0002]
【従来の技術】近年、産業用機械の分野において、固体
撮像素子の発達と相俟ってビデオカメラを用いた画像認
識装置が多用されている。また、顕微鏡の分野において
もビデオカメラに拡大用対物レンズを組み込んで微小物
体を観察する応用例も多数見られる。これらの観察装置
は比較的近接した物体を観察することを主たる目的とし
ており、いずれも各々の目的に応じた照明装置を併用し
ている。例えば、画像認識装置の場合は、画像処理を行
なうために観察するエリアを均一に照明し、物体を認識
するのに十分な明るさを確保すると共に、明るさのムラ
による誤認識を防いでいる。また、拡大を目的とする顕
微鏡用途のビデオカメラの場合は、一般に観察光学系が
暗く、かつ観察物体が微小であるため微小範囲に照明光
を集光して所望の明るさを確保している。さらに、イメ
ージファイバを内蔵した内視鏡や超小型固体撮像素子に
て撮像するビデオ内視鏡の場合も通常照明のない暗い管
内や人体の内部を観察することを目的としているため、
観察するのに十分な明るさを確保し、かつ広い視野を照
明する照明装置を備えている。そして、この種の光学的
な観察装置は、近接物体を観察する場合、対物レンズを
画像伝送手段としての光ファイバもしくは固体撮像素子
と同じ光軸上で前側に配置すると共に、照明用の光学系
を目的に応じて対物レンズの近傍に設置し、物体を光フ
ァイバの端面や、固体撮像素子の撮像面等の結像面に、
対物レンズを用いて結像させている。2. Description of the Related Art In recent years, in the field of industrial machines, an image recognition device using a video camera has been widely used in combination with the development of solid-state image pickup devices. Also in the field of microscopes, there are many application examples in which a magnifying objective lens is incorporated in a video camera to observe a minute object. These observation devices have a main purpose of observing objects that are relatively close to each other, and both of them also use an illumination device according to each purpose. For example, in the case of an image recognition device, an area to be observed for performing image processing is uniformly illuminated to ensure sufficient brightness for recognizing an object and prevent erroneous recognition due to uneven brightness. . Further, in the case of a video camera for a microscope intended for enlargement, since the observation optical system is generally dark and the observation object is minute, the illumination light is condensed in a minute range to secure a desired brightness. . Furthermore, even in the case of an endoscope that incorporates an image fiber or a video endoscope that captures images with a microminiature solid-state image sensor, it is intended to observe the inside of a dark tube or human body that is not illuminated normally.
It is equipped with an illumination device that ensures sufficient brightness for observation and illuminates a wide field of view. When observing a near object, this type of optical observation apparatus arranges an objective lens on the front side on the same optical axis as an optical fiber as an image transmission means or a solid-state image sensor, and an optical system for illumination. Depending on the purpose, it is installed in the vicinity of the objective lens, and the object is placed on the end face of the optical fiber or the image plane such as the image plane of the solid-state image sensor.
An image is formed using an objective lens.
【０００３】対物レンズの近傍に照明光学系を備えたも
のとしては、例えば特公平４−２０６１５号「拡大撮像
装置における照明用導光装置」が知られている。この照
明用導光装置は、多数の微細な光ファイバの先端出光部
を鏡筒内にこれと同軸に円環状に配列し、この光ファイ
バから出光する光を鏡筒先端面に設けた透明な半球状の
導光キャップ内に導き、このキャップ内に導かれた光が
キャップ内で全反射を繰り返して、キャップ中央に開設
した小孔の内周面から被験体の表面に投射されるように
構成したものである。この場合、導光キャップは光学系
との関連で、小孔の部分においてキャップ外面に当接す
る被験体にピントが合うように形成されている。つま
り、上記照明用導光装置は導光キャップの球心から小孔
までの距離、すなわち半径によって焦点位置を規定する
もので、キャップを被験体に当接することで、確実に焦
点位置に被験体を設置することができる利点を有してい
る。しかしながら、このような装置においては照明範囲
が小孔の微小範囲に限定されているばかりか、焦点位置
が固定であると任意の位置に自在に観察距離を調節して
撮像することができないという欠点があった。As a device provided with an illumination optical system in the vicinity of the objective lens, for example, Japanese Examined Patent Publication No. 4-20615, "Light guide device for illumination in magnified image pickup device" is known. In this light guide device for illumination, a plurality of minute optical fiber tip light emitting portions are arranged in a lens barrel in an annular shape coaxially with the light emitting portion, and the light emitted from the optical fibers is provided on the lens barrel tip surface. The light is guided into the hemispherical light-guiding cap, and the light guided into this cap is repeatedly totally reflected in the cap so that it is projected from the inner peripheral surface of the small hole formed in the center of the cap onto the surface of the subject. It is composed. In this case, the light guide cap is formed so as to be in focus with the subject contacting the outer surface of the cap in the small hole portion in relation to the optical system. That is, the above-mentioned light guide device for illumination defines the focus position by the distance from the spherical center of the light guide cap to the small hole, that is, the radius, and by bringing the cap into contact with the subject, the subject is surely placed at the focus position. It has the advantage that it can be installed. However, in such an apparatus, the illumination range is limited to a small range of small holes, and if the focus position is fixed, it is not possible to freely adjust the observation distance to capture an image. was there.
【０００４】そこで、焦点位置を自在に調整することが
できるようにしたものとして、例えば特公平４−２５４
号公報「内視鏡」が知られている。この内視鏡は、先端
構成部に形成された収納部に対物レンズが保持されたレ
ンズ枠を光軸方向にスライド自在に収容し、このレンズ
枠を操作ワイヤによってスライドさせる機構を採用して
焦点の位置調節を行なうように構成したものである。Therefore, for example, Japanese Patent Publication No. 4-254, in which the focus position can be freely adjusted, is disclosed.
The publication "Endoscope" is known. This endoscope uses a mechanism in which a lens frame holding an objective lens is slidably housed in an optical axis direction in a housing part formed at a distal end configuration part, and a mechanism for sliding the lens frame by an operation wire is used for focusing. It is configured to adjust the position of.
【０００５】[0005]
【発明が解決しようとする課題】しかしながら、上記し
た従来の内視鏡における焦点調節機構は、操作ワイヤの
押し引きを内視鏡の本体である操作部からの遠隔操作に
よって行なっているため対物レンズを内視鏡先端構成部
から着脱自在にして用途に応じて交換することができな
いという欠点があった。また、操作ワイヤの押し引きの
みで焦点調節を行なっているため内視鏡挿入部の曲がり
方の程度により焦点位置が変わってしまうという欠点が
あった。さらにまた、レンズ枠の外周面に形成された係
止部に操作ワイヤの連結部材を係合させる構造を採って
いるため、より小型な先端構成部を実現するためにはレ
ンズ枠の外周面に突起状に形成された係止部の近傍に照
明光学系を配設せざるを得ず、自ずから観察光学系の光
軸と偏心した構造となり、近接した物体を観察した場合
に、観察系と照明系の光軸のずれに伴う照明のムラが生
じるという欠点もあった。また、この機構にて光軸のず
れによって生じる照明ムラを解消する目的で照明系と観
察系の光軸を同軸上に形成するためには観察系の光軸か
らレンズ枠の外周面に突起状に形成された係止部上端ま
での距離を上回る半径の円周上に照明光学系を配置しな
ければならないので、外形が大きくなるという欠点をを
有している。However, in the focus adjusting mechanism in the above-mentioned conventional endoscope, since the push-pull of the operation wire is performed by the remote operation from the operation section which is the main body of the endoscope, the objective lens. However, there is a drawback in that it is not possible to attach and detach the endoscope from the distal end configuration part and replace it according to the application. Further, since the focus adjustment is performed only by pushing and pulling the operation wire, there is a drawback that the focus position changes depending on the bending degree of the endoscope insertion portion. Furthermore, since the connecting portion of the operation wire is engaged with the locking portion formed on the outer peripheral surface of the lens frame, the outer peripheral surface of the lens frame needs to be formed on the outer peripheral surface of the lens frame in order to realize a smaller tip end portion. There is no choice but to arrange the illumination optical system in the vicinity of the protrusion-shaped locking part, and the structure is naturally eccentric with the optical axis of the observation optical system. There is also a drawback that uneven illumination occurs due to the shift of the optical axis of the system. In addition, in order to eliminate the illumination unevenness caused by the deviation of the optical axis with this mechanism, in order to form the optical axis of the illumination system and the observation system on the same axis, the projection system is formed on the outer surface of the lens frame from the observation system optical axis. Since the illumination optical system has to be arranged on the circumference of a radius exceeding the distance to the upper end of the locking portion formed in the above, there is a drawback that the outer shape becomes large.
【０００６】したがって、本発明は上記したような従来
の問題点に鑑みてなされたもので、その目的とするとこ
ろは、レンズ交換が容易で種々の用途に使用することが
でき、また焦点調節を自在に行なうことができ、かつ照
明手段を備えた観察装置を提供することにある。Therefore, the present invention has been made in view of the above-mentioned conventional problems, and an object of the present invention is to easily replace a lens and to use it for various purposes and to adjust a focus. An object of the present invention is to provide an observation device that can be freely operated and is provided with an illumination means.
【０００７】[0007]
【課題を解決するための手段】本発明は上記目的を達成
するためになされたもので、その第１の発明は、物体の
画像を電気的または光学的に伝送する画像伝送手段を内
蔵する本体と、対物レンズを内蔵する鏡筒と、本体と鏡
筒を分離可能に連結する連結部材と、物体を照明する照
明光学系とを具備し、前記本体は、大径筒部と前記画像
伝送手段を収納し外周面には回転防止用ピンが一体的に
突設されて前記大径筒部の前方に突出する小径筒部とを
有し、前記鏡筒は、対物レンズを収容し外周面に雄ねじ
部と、前記本体の回転防止用ピンが挿入される軸線方向
の長孔とを有し、前記本体の小径筒部が挿入されるレン
ズ保持筒と、内周面に雌ねじ部を有しこの雌ねじ部に前
記レンズ保持筒の雄ねじ部が螺合することにより前記レ
ンズ保持筒を収納し、後端面が前記本体の大径筒部前端
面に当接されて前記連結部材により本体に接合固定され
る焦点調整用筒体とで構成されているものである。第２
の発明は、上記第１の発明において、照明光学系は、一
端が光源に接続されて他端部が前記本体の大径円筒部内
周面に沿って環状に配列され、その端面が大径円筒部の
前端面に臨む発光側光ファイバと、鏡筒の焦点調整用筒
体内に環状に配列され、その各端面が焦点調整用筒体の
端面に臨む出射側導光体とからなり、かつこの導光体
と、前記光ファイバの少なくとも先端部は画像伝送手段
および対物レンズと同軸上に配設されているものであ
る。The present invention has been made to achieve the above object, and the first invention thereof is a main body incorporating an image transmitting means for electrically or optically transmitting an image of an object. A lens barrel having a built-in objective lens, a connecting member for separably connecting the main body and the lens barrel, and an illumination optical system for illuminating an object. The main body has a large-diameter cylindrical portion and the image transmitting means. And a small-diameter cylindrical portion projecting forward from the large-diameter cylindrical portion integrally provided with an anti-rotation pin on the outer peripheral surface, and the lens barrel accommodates an objective lens and is provided on the outer peripheral surface. A male holding portion, an axially elongated hole into which the rotation preventing pin of the main body is inserted, a lens holding barrel into which the small diameter tubular portion of the main body is inserted, and an internal thread portion on the inner peripheral surface. The lens holding tube is stored by screwing the male thread of the lens holding tube into the female thread. , In which is composed of a focus adjusting cylindrical body is joined and fixed to the body by the coupling member the rear end face abuts on the large-diameter cylindrical portion front end face of the body. Second
In the first aspect of the invention, in the illumination optical system, one end is connected to the light source, and the other end is arranged in an annular shape along the inner peripheral surface of the large-diameter cylindrical portion of the main body, and the end surface is a large-diameter cylinder. A light emitting side optical fiber facing the front end face of the section, and an emitting side light guide body arranged in an annular shape in the focus adjusting barrel of the lens barrel, each end face of which faces the end face of the focus adjusting barrel, and The light guide and at least the tip of the optical fiber are arranged coaxially with the image transmission means and the objective lens.
【０００８】[0008]
【作用】本発明において、鏡筒を構成する焦点調整用筒
体の回転がこれとねじの螺合によって結合しているレン
ズ保持筒に伝達されると、レンズ保持筒は長孔と回転防
止用ピンとで回転を防止されていることで、光軸方向に
直線運動し、対物レンズの焦点位置を調節する。連結部
材は本体に鏡筒を分離可能に連結する。In the present invention, when the rotation of the focus adjusting cylinder forming the lens barrel is transmitted to the lens holding cylinder connected by screwing the same with the lens holding cylinder, the lens holding cylinder has a long hole and a rotation preventing member. Since rotation is prevented by the pin, it makes a linear movement in the optical axis direction and adjusts the focal position of the objective lens. The connecting member detachably connects the lens barrel to the main body.
【０００９】[0009]
【実施例】以下、本発明を図面に示す実施例に基づいて
詳細に説明する。図１は本発明に係る観察装置の一実施
例を示す断面図、図２は同装置の外観斜視図、図３は本
体と鏡筒の分解斜視図である。本実施例は小型のビデオ
カメラに適用した例を示す。これらの図において、１は
ビデオカメラの先端部を構成する観察装置で、この観察
装置１は、画像伝送手段としての固体撮像素子３を収容
した本体２と、対物レンズ５を収容し本体２に着脱可能
に取付けられる鏡筒４と、本体２と鏡筒４を分離可能に
連結固定する連結部材６とを備えている。DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to the embodiments shown in the drawings. FIG. 1 is a sectional view showing an embodiment of an observation apparatus according to the present invention, FIG. 2 is an external perspective view of the same, and FIG. 3 is an exploded perspective view of a main body and a lens barrel. This embodiment shows an example applied to a small video camera. In these figures, reference numeral 1 is an observing device that constitutes the tip of a video camera. This observing device 1 includes a main body 2 that houses a solid-state image sensor 3 as an image transmission means and an objective lens 5 that is housed in the main body 2. It includes a lens barrel 4 which is detachably attached, and a connecting member 6 which detachably connects and fixes the main body 2 and the lens barrel 4.
【００１０】前記本体２は、大径の外筒体（大径筒部）
２Ａと、後端部が外筒体２Ａに同軸に嵌挿された小径の
内筒体（小径筒部）２Ｂとで構成されることにより２重
筒構造をなし、外筒体２Ａの前端面７に前記鏡筒４が連
結部材６によって接続固定されるようになっている。前
記外筒体２Ａは、その外周面の一部に雄ねじ部８を有
し、可撓管９を介して不図示のカメラコントローラ部に
接続されている。内筒体２Ｂは、前記外筒体２Ａの前面
側開口部から前方に突出する前端部２１０が、外筒体２
Ａ内に挿入されている後端部２１１より小径に形成され
て、その前端面中央に開設された開口部１０にカバーガ
ラス１１がはめ込まれて接着剤により固定されており、
またその内側面には前記固体撮像素子３が同じく接着剤
によって密接固定されている。固体撮像素子３には配線
１３の一端が接続されており、この配線１３の他端側は
前記可撓管９内を通ってカメラコントローラ部に接続さ
れている。また、前記前端部２１０の外周面中間部には
一対の回転防止用ピン１２ａ、１２ｂが周方向に１８０
°ずれて一体に突設されている。一方、前記後端部２１
１の外周面と前記外筒体２Ａの内周面との間には環状の
隙間１４が設けられており、この環状隙間１４には、光
源からの光を鏡筒４に配設された出射側光ファイバ２９
に導く発光側光ファイバ１５が組み込まれている。この
発光側光ファイバ１５は、直径５０μｍ程度の多数の微
細な光ファイバ群によって構成され、前記隙間１４に挿
入されている端部の先端面が前記外筒体２Ａの前端面７
と同一面を形成して外部に露呈し、他端部が一つに束ね
られて前記可撓管９内を通り不図示の光源に接続されて
いる。The main body 2 has a large-diameter outer cylindrical body (large-diameter cylindrical portion).
2A and a rear end portion of the outer cylinder body 2A that is coaxially inserted into a small diameter inner cylinder body (small diameter cylinder portion) 2B to form a double cylinder structure. The lens barrel 4 is connected and fixed to the lens 7 by a connecting member 6. The outer cylindrical body 2A has a male screw portion 8 on a part of its outer peripheral surface and is connected to a camera controller portion (not shown) via a flexible tube 9. The inner tubular body 2B has a front end portion 210 that projects forward from the front opening of the outer tubular body 2A.
The cover glass 11 is formed with a diameter smaller than that of the rear end portion 211 inserted into A, and the cover glass 11 is fitted into the opening portion 10 opened at the center of the front end surface and fixed by an adhesive,
Further, the solid-state image pickup device 3 is also closely fixed to the inner surface thereof by an adhesive. One end of the wiring 13 is connected to the solid-state image pickup device 3, and the other end of the wiring 13 is connected to the camera controller section through the inside of the flexible tube 9. In addition, a pair of rotation preventing pins 12a and 12b are provided at the middle portion of the outer peripheral surface of the front end portion 210 in the circumferential direction.
Deviated by a degree and projected integrally. On the other hand, the rear end portion 21
An annular gap 14 is provided between the outer peripheral surface of the outer cylindrical body 1 and the inner peripheral surface of the outer cylindrical body 2A. In the annular gap 14, the light from the light source is emitted from the lens barrel 4. Side optical fiber 29
The optical fiber 15 on the light-emission side is introduced. The light emitting side optical fiber 15 is composed of a large number of fine optical fiber groups having a diameter of about 50 μm, and the tip end surface of the end portion inserted into the gap 14 is the front end surface 7 of the outer cylindrical body 2A.
Is exposed to the outside, and the other ends are bundled into one and pass through the flexible tube 9 to be connected to a light source (not shown).
【００１１】前記鏡筒４は、前記本体２と同様、レンズ
保持筒２０と、焦点調整用筒体２１とで２重筒構造を構
成しており、さらに焦点調整用筒体２１自体も２重筒構
造をなすことにより内筒２１ａと外筒２１ｂとで構成さ
れている。レンズ保持筒２０は、内部前端側開口部付近
にて前記対物レンズ５を収納保持し、外周面に雄ねじ部
２２と、前記本体２の回転防止用ピン１２ａ、１２ｂに
対応して形成された軸線方向に長い一対の長孔２３ａ、
２３ｂとを有し、前記本体２の内筒体２Ｂの小径部２１
０に摺動自在に嵌装され、かつ前記ピン１２ａ、１２ｂ
と長孔２３ａ、２３ｂにより回転を防止されている。前
記雄ねじ部２２は、レンズ保持筒２０の外周面で対物レ
ンズ５が収納されている部位に形成され、長孔２３ａ、
２３ｂは外周面後端部側に形成されてその後端が前記回
転防止用ピン１２ａ、１２ｂの挿入を可能にするためレ
ンズ保持筒２０の後端面に開放されている。前記焦点調
整用筒体２１の内筒２１ａは、外径が前記本体２の内筒
体２Ｂの大径部２１１の外径と略等しく、内径が前記レ
ンズ保持筒２０の外径と略等しいかこれより若干大きく
設定されており、内周面前端部寄りにレンズ保持筒２０
の雄ねじ部２２に螺合する雌ねじ部２４が形成されてい
る。また、この雌ねじ部２４の前方側には止め輪２５が
嵌着固定されており、これによってレンズ保持筒２０が
内筒２１ａから抜けるのを防止している。前記外筒２１
ｂは、前記外筒体２Ａの内径と略同一の内径を有し、外
周面後端部に前記連結部材６の抜けを防止する鍔部２６
と抜け止めリング２７が設けられている。前記内筒２１
ａと外筒２１ｂとの間には環状の隙間２８が形成されて
おり、この環状隙間２８には前記出射側光ファイバ２９
が組み込まれている。この出射側光ファイバ２９は、前
記発光側光ファイバ１５と共に観察装置１の照明光学系
を構成するもので、発光側光ファイバ１５と同様、直径
５０μｍ程度の多数の微細な光ファイバ群からなり、そ
の端面が環状隙間２８の両端開口部にそれぞれ臨んでい
る。そして、出射側光ファイバ２９の後端面は、前記本
体２の前端面７に鏡筒４の後端面が密接されると、光の
損失を少なくするため前記発光側光ファイバ１５の前端
面に密接される。なお、発光側光ファイバ１５の環状隙
間１４に挿入されている反光源側端部と、出射側光ファ
イバ２９は、固体撮像素子３および対物レンズ５に対し
て同軸上に配設されている。また、鏡筒４側の導光体と
しては光ファイバ２９に限らず、透明樹脂またはガラス
によって円筒状に形成され入光面と出射面を有するもの
であってもよい。Like the main body 2, the lens barrel 4 has a double-barreled structure including a lens holding barrel 20 and a focus adjusting barrel 21, and the focus adjusting barrel 21 itself is double. The inner cylinder 21a and the outer cylinder 21b are formed by forming a cylindrical structure. The lens holding cylinder 20 accommodates and holds the objective lens 5 in the vicinity of the opening on the inner front end side, and has an external thread on the outer peripheral surface thereof and an axis line formed corresponding to the rotation preventing pins 12a and 12b of the main body 2. A pair of long holes 23a long in the direction,
23b, and the small diameter portion 21 of the inner cylindrical body 2B of the main body 2
0 is slidably fitted and has the pins 12a and 12b.
The rotation is prevented by the long holes 23a and 23b. The male screw portion 22 is formed on a portion of the outer peripheral surface of the lens holding cylinder 20 in which the objective lens 5 is housed, and has a long hole 23a,
Reference numeral 23b is formed on the rear end side of the outer peripheral surface, and its rear end is open to the rear end surface of the lens holding cylinder 20 so that the rotation preventing pins 12a and 12b can be inserted. The outer diameter of the inner cylinder 21a of the focus adjustment cylinder 21 is substantially equal to the outer diameter of the large diameter portion 211 of the inner cylinder 2B of the main body 2, and the inner diameter is substantially equal to the outer diameter of the lens holding cylinder 20. It is set to be slightly larger than this, and the lens holding cylinder 20 is located near the front end of the inner peripheral surface.
A female screw portion 24 that is screwed into the male screw portion 22 is formed. Further, a retaining ring 25 is fitted and fixed on the front side of the female screw portion 24, thereby preventing the lens holding barrel 20 from coming off from the inner barrel 21a. The outer cylinder 21
b has an inner diameter that is substantially the same as the inner diameter of the outer cylindrical body 2A, and a flange portion 26 that prevents the connecting member 6 from coming off at the rear end portion of the outer peripheral surface.
A retaining ring 27 is provided. The inner cylinder 21
An annular gap 28 is formed between a and the outer cylinder 21b, and the emission side optical fiber 29 is provided in the annular gap 28.
Is built in. The emission side optical fiber 29 constitutes the illumination optical system of the observation apparatus 1 together with the emission side optical fiber 15, and, like the emission side optical fiber 15, is composed of a large number of fine optical fibers having a diameter of about 50 μm. The end faces face the openings at both ends of the annular gap 28, respectively. When the rear end face of the emission side optical fiber 29 is brought into close contact with the front end face 7 of the main body 2, the rear end face of the lens barrel 4 is brought into close contact with the front end face of the light emitting side optical fiber 15 in order to reduce loss of light. To be done. The end of the optical fiber 15 on the side opposite to the light source, which is inserted into the annular gap 14, and the optical fiber 29 on the emission side are arranged coaxially with respect to the solid-state imaging device 3 and the objective lens 5. Further, the light guide on the side of the lens barrel 4 is not limited to the optical fiber 29, and may be a cylinder formed of transparent resin or glass and having a light entrance surface and an exit surface.
【００１２】前記連結部材６はナットからなり、前端部
内周面に突設された環状凸部６ａが前記焦点調整用筒体
２１の鍔部２６と抜け止めリング２７との間に位置され
ることにより焦点調整用筒体２１の後端部外周面に回転
自在に嵌装されており、後端部内周面に前記本体２の雄
ねじ部８に螺合する雌ねじ部３０が形成されている。本
体２と鏡筒４との連結に際しては、レンズ保持筒２０の
内部に本体２の内筒体２Ｂの小径部２１０を後方から回
転防止用ピン１２ａ、１２ｂと長孔２３ａ、２３ｂとを
一致させて嵌挿し、しかる後連結部材６を締付け方向に
回転させてその雌ねじ部３０を本体２の雄ねじ部８に螺
合し、焦点調整用筒体２１の後端面を外筒体２Ａの前端
面７と内筒体２Ｂの段差面３１に圧接することで、組付
けを完了する。The connecting member 6 is composed of a nut, and an annular convex portion 6a provided on the inner peripheral surface of the front end portion is located between the collar portion 26 of the focus adjusting cylinder 21 and the retaining ring 27. Is rotatably fitted to the outer peripheral surface of the rear end portion of the focus adjusting cylinder 21, and the female screw portion 30 that is screwed into the male screw portion 8 of the main body 2 is formed on the inner peripheral surface of the rear end portion. When connecting the main body 2 and the lens barrel 4, the small diameter portion 210 of the inner cylindrical body 2B of the main body 2 is fitted in the lens holding cylinder 20 from the rear side so that the rotation preventing pins 12a and 12b and the long holes 23a and 23b are aligned with each other. Then, the connecting member 6 is rotated in the tightening direction and the female screw portion 30 is screwed into the male screw portion 8 of the main body 2 so that the rear end surface of the focus adjusting cylinder 21 becomes the front end surface 7 of the outer cylinder 2A. Assembling is completed by pressing the stepped surface 31 of the inner cylindrical body 2B.
【００１３】このような構成からなる撮影装置１におい
て、物体の観察に際して対物レンズ５の焦点位置を調整
する場合は、連結部材６を若干緩めて鏡筒４を本体２に
対して回転可能な状態とし、しかる後この状態で焦点調
整用筒体２１を手で回転させればよい。すると、その回
転は雌ねじ部２４および雄ねじ部２２を介してレンズ保
持筒２０に伝達されるが、この時、レンズ保持筒２０は
回転防止用ピン１２ａ、１２ｂと長孔２３ａ、２３ｂに
よって回転を阻止されているので、外筒体２１の回転運
動がレンズ保持筒２０の光軸方向の直線運動に変換さ
れ、これによって対物レンズ５の焦点位置を前方もしく
は後方にずらすことができる。したがって、観察物体の
距離に応じて任意の位置の観察像を得ることができる。
また、観察物体に応じて異なった焦点距離の対物レンズ
と交換する場合は、連結部材６を十分に緩めて本体２と
の螺合結合関係を解除すると、鏡筒４を本体２から取り
外すことができるため、異なった焦点距離の対物レンズ
を備えた他の鏡筒と簡単に交換することができる。さら
にまた、本発明においては上記した従来の内視鏡と異な
り、対物レンズ５の焦点調整機構を構成する内筒体２０
および外筒体２１の外周の一部に突起部を設ける必要が
ないので、照明光学系を構成する発光側光ファイバ１５
および出射側光ファイバ２９を固体撮像素子３および対
物レンズ５に対して同軸上に環状に設けることができ、
その結果として装置の小型化および照明ムラのない良好
な照明を得ることができる利点を有する。In the photographing apparatus 1 having such a structure, when the focal position of the objective lens 5 is adjusted when observing an object, the connecting member 6 is slightly loosened so that the lens barrel 4 can be rotated with respect to the main body 2. Then, in this state, the focusing cylinder 21 may be manually rotated. Then, the rotation is transmitted to the lens holding barrel 20 via the female screw portion 24 and the male screw portion 22. At this time, the lens holding barrel 20 is prevented from rotating by the rotation preventing pins 12a and 12b and the long holes 23a and 23b. Therefore, the rotational movement of the outer tubular body 21 is converted into the linear movement of the lens holding barrel 20 in the optical axis direction, whereby the focus position of the objective lens 5 can be shifted forward or backward. Therefore, an observation image at an arbitrary position can be obtained according to the distance of the observation object.
Further, when the objective lens having a different focal length depending on the observation object is to be replaced, the lens barrel 4 can be detached from the main body 2 by loosening the connecting member 6 sufficiently to release the screwed connection with the main body 2. Therefore, it can be easily replaced with another lens barrel having an objective lens having a different focal length. Furthermore, in the present invention, unlike the above-mentioned conventional endoscope, the inner cylindrical body 20 constituting the focus adjusting mechanism of the objective lens 5 is provided.
Also, since it is not necessary to provide a protrusion on a part of the outer circumference of the outer cylinder body 21, the light emitting side optical fiber 15 which constitutes the illumination optical system.
And the output side optical fiber 29 can be provided in an annular shape coaxially with the solid-state imaging device 3 and the objective lens 5,
As a result, there are advantages that the device can be downsized and good illumination without illumination unevenness can be obtained.
【００１４】なお、上記実施例は画像伝送手段として固
体撮像素子３を用いた場合について説明したが、これに
限らずイメージ（光）ファイバを用い、物体の画像を光
学的に伝送するようにしてもよいことは勿論である。In the above embodiment, the case where the solid-state image pickup device 3 is used as the image transmission means has been described, but the present invention is not limited to this, and an image (optical) fiber is used to optically transmit the image of the object. Of course, it is also good.
【００１５】[0015]
【発明の効果】以上説明したように本発明に係る観察装
置は、本体と、本体に対して着脱自在に取付けられる鏡
筒とを備え、鏡筒を対物レンズを収納したレンズ保持筒
と、本体に連結部材によって連結固定される焦点調整用
筒体とで２重筒構造とし、焦点調整用筒体の回転を回転
防止用ピンと長孔とで直線運動に変換することによりレ
ンズ保持筒を光軸方向に移動させて対物レンズの焦点位
置を調整するように構成したので、焦点位置の調整が簡
単かつ容易で、観察物体の距離に応じて任意の位置の観
察像を得ることができる。また異なった焦点距離を有す
る対物レンズとの交換作業も容易で、縮小像から拡大像
まで広範囲に観察することができる。さらにまた、本発
明は照明光学系を画像伝送手段および対物レンズと同軸
上に環状に配置しているので、明るさにムラがなく、ま
た広い範囲を照明することができるなど、その効果は大
である。As described above, the observing apparatus according to the present invention includes a main body, a lens barrel detachably attached to the main body, a lens holding barrel for accommodating an objective lens in the lens barrel, and a main body. A double cylinder structure is formed by the focus adjusting cylinder body that is connected and fixed to the lens holding cylinder by converting the rotation of the focus adjusting cylinder body into a linear movement by the rotation preventing pin and the elongated hole. Since the focus position of the objective lens is adjusted by moving the focus lens in the direction, adjustment of the focus position is simple and easy, and an observation image at an arbitrary position can be obtained according to the distance of the observation object. Further, it is easy to replace the objective lens with a different focal length, and it is possible to observe a wide range from a reduced image to an enlarged image. Furthermore, in the present invention, since the illumination optical system is arranged in an annular shape on the same axis as the image transmission means and the objective lens, the brightness is uniform and a wide range can be illuminated. Is.
【図１】本発明に係る観察装置の一実施例を示す断面図
である。FIG. 1 is a sectional view showing an embodiment of an observation apparatus according to the present invention.
【図２】同装置の外観斜視図である。FIG. 2 is an external perspective view of the same device.
【図３】本体と鏡筒の分解斜視図である。FIG. 3 is an exploded perspective view of a main body and a lens barrel.
２ 本体 ３ 固体撮像素子 ４ 鏡筒 ５ 対物レンズ ６ 連結部材 ７ 前端面 ８ 雄ねじ部 ９ 可撓管 １２ａ、１２ｂ 回転防止用ピン １５ 発光側光ファイバ ２０ レンズ保持筒 ２１ 焦点調整用筒体 ２２ 雄ねじ部 ２３ａ、２３ｂ 長孔 ２４ 雌ねじ部 ２９ 出射側光ファイバ ３０ 雌ねじ部 2 Main body 3 Solid-state image sensor 4 Lens barrel 5 Objective lens 6 Connecting member 7 Front end face 8 Male screw part 9 Flexible tube 12a, 12b Rotation prevention pin 15 Light emitting side optical fiber 20 Lens holding cylinder 21 Focus adjusting cylinder 22 Male screw part 23a, 23b Long hole 24 Female threaded portion 29 Output side optical fiber 30 Female threaded portion
Claims (2)
する画像伝送手段を内蔵する本体と、対物レンズを内蔵
する鏡筒と、本体と鏡筒を分離可能に連結する連結部材
と、物体を照明する照明光学系とを具備し、 前記本体は、大径筒部と前記画像伝送手段を収納し外周
面には回転防止用ピンが一体的に突設されて前記大径筒
部の前方に突出する小径筒部とを有し、 前記鏡筒は、対物レンズを収容し外周面に雄ねじ部と、
前記本体の回転防止用ピンが挿入される軸線方向の長孔
とを有し、前記本体の小径筒部が挿入されるレンズ保持
筒と、内周面に雌ねじ部を有しこの雌ねじ部に前記レン
ズ保持筒の雄ねじ部が螺合することにより前記レンズ保
持筒を収納し、後端面が前記本体の大径筒部前端面に当
接されて前記連結部材により本体に接合固定される焦点
調整用筒体とで構成されていることを特徴とする観察装
置。1. A body containing an image transmitting means for electrically or optically transmitting an image of an object, a lens barrel containing an objective lens, a connecting member for detachably connecting the body and the lens barrel, and the object. And an illumination optical system for illuminating the front side of the large-diameter cylindrical portion, wherein the main body accommodates the large-diameter cylindrical portion and the image transmitting means, and a rotation preventing pin is integrally projectingly provided on an outer peripheral surface of the main body. And a small-diameter cylindrical portion protruding to the lens barrel, wherein the lens barrel accommodates an objective lens and a male screw portion on the outer peripheral surface,
A lens holding cylinder having an axially elongated hole into which the rotation preventing pin of the main body is inserted, a small diameter cylindrical portion of the main body being inserted, and an internal thread portion on an inner peripheral surface of the internal thread portion. For focus adjustment in which the male thread portion of the lens holding cylinder is screwed to accommodate the lens holding cylinder, and the rear end surface of the lens holding cylinder is brought into contact with the front end surface of the large-diameter cylindrical portion of the main body and is joined and fixed to the main body by the connecting member An observation device comprising: a tubular body.
光学系は、一端が光源に接続されて他端部が前記本体の
大径円筒部内周面に沿って環状に配列され、その端面が
大径円筒部の前端面に臨む発光側光ファイバと、鏡筒の
焦点調整用筒体内に環状に配列され、その各端面が焦点
調整用筒体の端面に臨む出射側導光体とからなり、かつ
この導光体と、前記光ファイバの少なくとも先端部は画
像伝送手段および対物レンズと同軸上に配設されている
ことを特徴とする観察装置。2. The observation apparatus according to claim 1, wherein the illumination optical system has one end connected to a light source and the other end arranged annularly along the inner peripheral surface of the large-diameter cylindrical portion of the main body. It consists of a light-emitting side optical fiber facing the front end surface of the large-diameter cylindrical portion, and an exit-side light guide body annularly arranged in the focus adjusting cylinder body, each end surface of which faces the end surface of the focus adjusting cylinder body. An observation apparatus characterized in that the light guide and at least the tip of the optical fiber are arranged coaxially with the image transmission means and the objective lens.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4200190A JPH0627393A (en) | 1992-07-06 | 1992-07-06 | Observation device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4200190A JPH0627393A (en) | 1992-07-06 | 1992-07-06 | Observation device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0627393A true JPH0627393A (en) | 1994-02-04 |
Family
ID=16420297
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4200190A Pending JPH0627393A (en) | 1992-07-06 | 1992-07-06 | Observation device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0627393A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002301012A (en) * | 2001-04-05 | 2002-10-15 | Olympus Optical Co Ltd | Electronic endoscope |
| JP2007034133A (en) * | 2005-07-29 | 2007-02-08 | Chinontec Kk | Small-diameter camera |
| JP2009297430A (en) * | 2008-06-17 | 2009-12-24 | Fujinon Corp | Endoscope |
| WO2014188796A1 (en) * | 2013-05-23 | 2014-11-27 | オリンパスメディカルシステムズ株式会社 | Distal-end-forming member for medical instrument, endoscope cleaning sheath, and endoscope system using said endoscope cleaning sheath |
| WO2016158352A1 (en) * | 2015-03-31 | 2016-10-06 | 富士フイルム株式会社 | Endoscope |
| JP2020086297A (en) * | 2018-11-29 | 2020-06-04 | 株式会社キーエンス | Magnifying observation device |
| JP2021502583A (en) * | 2017-11-10 | 2021-01-28 | ニューレセンス インコーポレイテッド | Small lens-fiber connector with biological focusing function |
-
1992
- 1992-07-06 JP JP4200190A patent/JPH0627393A/en active Pending
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002301012A (en) * | 2001-04-05 | 2002-10-15 | Olympus Optical Co Ltd | Electronic endoscope |
| JP4647817B2 (en) * | 2001-04-05 | 2011-03-09 | オリンパス株式会社 | Electronic endoscope |
| JP2007034133A (en) * | 2005-07-29 | 2007-02-08 | Chinontec Kk | Small-diameter camera |
| JP2009297430A (en) * | 2008-06-17 | 2009-12-24 | Fujinon Corp | Endoscope |
| WO2014188796A1 (en) * | 2013-05-23 | 2014-11-27 | オリンパスメディカルシステムズ株式会社 | Distal-end-forming member for medical instrument, endoscope cleaning sheath, and endoscope system using said endoscope cleaning sheath |
| JP5670000B1 (en) * | 2013-05-23 | 2015-02-18 | オリンパスメディカルシステムズ株式会社 | End member of medical device, endoscope cleaning sheath, and endoscope system using this endoscope cleaning sheath |
| US9629531B2 (en) | 2013-05-23 | 2017-04-25 | Olympus Corporation | Distal end configuring member of medical instrument, endoscope cleaning sheath and endoscope system using the endoscope cleaning sheath |
| WO2016158352A1 (en) * | 2015-03-31 | 2016-10-06 | 富士フイルム株式会社 | Endoscope |
| JPWO2016158352A1 (en) * | 2015-03-31 | 2017-12-14 | 富士フイルム株式会社 | Endoscope |
| US11693226B2 (en) | 2015-03-31 | 2023-07-04 | Fujifilm Corporation | Endoscope |
| JP2021502583A (en) * | 2017-11-10 | 2021-01-28 | ニューレセンス インコーポレイテッド | Small lens-fiber connector with biological focusing function |
| JP2020086297A (en) * | 2018-11-29 | 2020-06-04 | 株式会社キーエンス | Magnifying observation device |
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