JPH0228491Y2 - - Google Patents
Info
- Publication number
- JPH0228491Y2 JPH0228491Y2 JP6465482U JP6465482U JPH0228491Y2 JP H0228491 Y2 JPH0228491 Y2 JP H0228491Y2 JP 6465482 U JP6465482 U JP 6465482U JP 6465482 U JP6465482 U JP 6465482U JP H0228491 Y2 JPH0228491 Y2 JP H0228491Y2
- Authority
- JP
- Japan
- Prior art keywords
- field
- eyepiece
- view
- endoscope
- field diaphragm
- 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
Links
- 230000003287 optical effect Effects 0.000 claims description 16
- 230000005540 biological transmission Effects 0.000 claims description 7
- 239000000835 fiber Substances 0.000 description 8
- 238000003780 insertion Methods 0.000 description 8
- 230000037431 insertion Effects 0.000 description 8
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 description 8
- 238000005530 etching Methods 0.000 description 6
- 230000002093 peripheral effect Effects 0.000 description 6
- 239000006059 cover glass Substances 0.000 description 5
- 238000010586 diagram Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 230000000007 visual effect Effects 0.000 description 3
- 208000004350 Strabismus Diseases 0.000 description 1
- 230000001154 acute effect Effects 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000005286 illumination Methods 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 210000001835 viscera Anatomy 0.000 description 1
Landscapes
- Instruments For Viewing The Inside Of Hollow Bodies (AREA)
- Diaphragms For Cameras (AREA)
Description
【考案の詳細な説明】
本考案は、接眼レンズ後方から観察される視野
内に方向等を表示する突出する指標が形成された
内視鏡において、前記指標としての機能を向上さ
せることのできる内視鏡の視野絞り装置に関する
ものである。[Detailed description of the invention] The present invention provides an endoscope in which a protruding indicator is formed for displaying direction, etc. in the field of view observed from the rear of the eyepiece, and an internal indicator that can improve the function of the indicator. This invention relates to a field diaphragm device for an endoscope.
近年、体腔内に挿入部を挿入して体腔内臓器等
対象物を観察及び診断したり、機械類、化学プラ
ント等の管内に挿入して管内壁面を観察したり、
管内壁面から付着物等を採取したりして保守に利
用できる内視鏡が広く用いられている。 In recent years, the insertion section has been inserted into body cavities to observe and diagnose objects such as internal organs, or inserted into pipes of machinery, chemical plants, etc. to observe the inner wall surfaces of the pipes.
Endoscopes are widely used because they can be used for maintenance by collecting deposits from the inner walls of tubes.
上記内視鏡は、挿入部の先端側に形成された内
視鏡用の対物レンズ系で結像された対象物の光学
像を像伝達手段にて手元側の接眼部側に伝達し、
接眼部内に配設された接眼光学系後方に眼を近接
させることにより、又は内視鏡カメラ等の撮影装
置を装着して（写真）撮影できるように構成され
ている。 The endoscope transmits an optical image of the object formed by an endoscope objective lens system formed on the distal end side of the insertion section to the eyepiece section side on the proximal side by an image transmission means,
It is configured so that photographs can be taken by bringing the eye close to the rear of the eyepiece optical system disposed in the eyepiece section, or by attaching a photographing device such as an endoscope camera.
上記接眼光学系は、前記像伝達手段によつて伝
達された光学像を拡大して観察するための接眼レ
ンズ系と共に、像伝達手段によつて鮮明に結像さ
せる位置近傍に視野範囲を設定する視野絞りが配
設されている。この視野絞りは、基板を所定の形
状でエツチングして形成していた。このようにエ
ツチングにより構成された従来の視野絞りを第１
図に示す。 The eyepiece optical system, together with an eyepiece lens system for enlarging and observing the optical image transmitted by the image transmission means, sets a viewing range near a position where the image is clearly formed by the image transmission means. A field diaphragm is provided. This field stop was formed by etching a substrate into a predetermined shape. The conventional field diaphragm constructed by etching in this way is
As shown in the figure.
同図に示すように、従来の視野絞り１において
は、寸法が小さいため、エツチング処理によつて
形成される視野の円状の周縁部２が滑らかに仕上
がらないことと、視野の中心等の方向を表示する
指標となる鋸歯状に突出する指標３における直線
状の端部３Ａが視野周縁において鋭角状に形成さ
れないで、なだらかに湾曲した裾部が形成される
ため、上記指標３の端部３Ａの方向表示用の直線
状部分が短くなる。 As shown in the figure, because the conventional field stop 1 has small dimensions, the circular peripheral edge 2 of the field formed by etching cannot be finished smoothly, and the direction of the center of the field etc. The linear end 3A of the indicator 3 that protrudes like a sawtooth and serves as an indicator for displaying is not formed in an acute angle shape at the peripheral edge of the field of view, but a gently curved skirt is formed. The straight line section for direction indication becomes shorter.
従つて、接眼レンズを通して（拡大して）観察
した場合視野範囲内の対象物と共に、視野の周縁
にエツチング処理によつて形成された小さな凹凸
等が拡大して観察されてしまい見づらいものとな
る。又、指標３による方向表示用の端部３Ａの視
野の外周側になだらかな湾曲する裾部分が形成さ
れるため方向表示の機能の精度が低下するという
問題があつた。 Therefore, when observing (magnifying) through the eyepiece, small irregularities formed by etching on the periphery of the field of view are magnified along with the object within the field of view, making it difficult to see. Furthermore, since a gently curved hem portion is formed on the outer peripheral side of the field of view of the end portion 3A for direction display by the indicator 3, there is a problem in that the accuracy of the direction display function is reduced.
本考案は上述した点にかんがみてなされたもの
で、視野周縁に見づらい凹凸が観察されることな
く、且つ方向表示の機能の精度を向上し得る内視
鏡の視野絞り装置を提供することを目的とする。 The present invention has been developed in view of the above-mentioned points, and an object thereof is to provide a field diaphragm device for an endoscope that can prevent difficult-to-see unevenness from being observed at the periphery of the field of view and can improve the accuracy of the direction display function. shall be.
前記目的を達成するために本考案は、対物光学
系で結像された光学像を、像伝達手段を介し、視
野範囲を形成する中空視野部を有する枠状の視野
絞り後方の接眼レンズを通して観察できるように
構成された内視鏡において、前記視野絞りに、視
野内に突出する楔形の指標を設け、前記視野絞り
を取り付ける凹部を設けた中空部材若しくは該凹
部周辺の中空部材に、視野絞りの中空視野部内周
面を遮蔽するとともに、前記楔形指標の裾部を遮
蔽する内側に突出する突部を形成している。 In order to achieve the above object, the present invention enables observation of an optical image formed by an objective optical system through an eyepiece behind a frame-shaped field diaphragm having a hollow field part forming a field of view via an image transmission means. In the endoscope, the field diaphragm is provided with a wedge-shaped index protruding into the field of view, and the field diaphragm is provided in a hollow member provided with a recess for attaching the field diaphragm, or in a hollow member around the recess. A protrusion protruding inward is formed to cover the inner circumferential surface of the hollow field of view and the bottom of the wedge-shaped indicator.
以下、図面を参照して本考案を具体的に説明す
る。 Hereinafter, the present invention will be explained in detail with reference to the drawings.
第２図ないし第５図は第１実施例に係り、第２
図は第１実施例が取付けられた斜視型の硬性内視
鏡を示し、第３図は第２図の第１実施例が取付け
られた部分周辺を拡大して示し、第４図は第３図
のＡ−Ａ線断面を示し、第５図は第１図の接眼部
後方から観察した視野を示す。 Figures 2 to 5 relate to the first embodiment;
The figure shows a perspective type rigid endoscope to which the first embodiment is attached, FIG. 3 shows an enlarged view of the area around the part of FIG. 2 to which the first embodiment is attached, and FIG. A cross section taken along the line A-A in the figure is shown, and FIG. 5 shows the field of view observed from behind the eyepiece in FIG. 1.
これらの図において、第１実施例が取付けられ
た斜視型の硬性内視鏡１１は、例えば体腔内に挿
入される細長の挿入部１２と、該挿入部１２後端
側に段部状に拡径にして側部にライトガイド口金
部１３を設けた操作部１４と、該操作部１４後端
側に形成され、内部に接眼レンズ系１５を配設し
た接眼部１６とより構成されている。 In these figures, a perspective type rigid endoscope 11 to which the first embodiment is attached has, for example, an elongated insertion section 12 that is inserted into a body cavity, and a step-shaped expansion at the rear end of the insertion section 12. It is composed of an operating section 14 having a light guide cap section 13 on its side in terms of diameter, and an eyepiece section 16 formed on the rear end side of the operating section 14 and having an eyepiece system 15 disposed therein. .
上記挿入部１２は硬性の外管１７で形成され、
先端側は球面又は円錐等を切り欠いて所定の斜視
方向に臨む開口部が形成されている。この外管１
７内には観察光学系が収納された内管１８と、該
内管１８外周の断面が略三日月状となる空隙部に
照明光を伝達して端面から出射するライトガイド
フアイバ１９とが配設されている。 The insertion portion 12 is formed of a hard outer tube 17,
An opening facing in a predetermined oblique direction is formed by cutting out a spherical or conical surface on the distal end side. This outer tube 1
An inner tube 18 in which an observation optical system is housed, and a light guide fiber 19 that transmits illumination light to a gap having a substantially crescent-shaped cross section on the outer periphery of the inner tube 18 and outputs it from the end surface are disposed within the inner tube 18. has been done.
上記内管１８の先端側には中空の内管先端部材
２０が固定され、この内管先端部材２０には観察
光が入射される窓部となるカバーガラス２１が固
定枠２２によつて圧接するように固定されてい
る。 A hollow inner tube tip member 20 is fixed to the tip side of the inner tube 18, and a cover glass 21, which serves as a window through which observation light is incident, is pressed into contact with the inner tube tip member 20 by a fixed frame 22. It is fixed as follows.
上記カバーガラス２１で封止された内側には、
観察用の対物光学系が配設されている。即ち、カ
バーガラス２１に対向して対物レンズ系２３が配
設され、該対物レンズ系２３の光軸に沿つて入射
された光は、さらに内側に配設されたプリズム２
４によつて反射されて挿入部１２の内管１８の中
心軸が光軸となるようにして進行し、内管１８内
に挿通された像伝達手段としてのリレーレンズ系
２５によつて接眼部１６側に伝達されるよう構成
されている。上記リレーレンズ系２５によつて対
象物の光学像が結像される位置近傍で、接眼レン
ズ系１５前方となる位置には本考案に係る視野絞
り２６が配設されている。 On the inside sealed with the cover glass 21,
An objective optical system for observation is provided. That is, an objective lens system 23 is disposed facing the cover glass 21, and the light incident along the optical axis of the objective lens system 23 passes through a prism 2 disposed further inside.
4, the optical axis of the inner tube 18 of the insertion section 12 becomes the optical axis, and the relay lens system 25 serving as an image transmission means inserted into the inner tube 18 is used to transmit the image to the eyepiece. It is configured to be transmitted to the section 16 side. A field diaphragm 26 according to the present invention is disposed at a position in front of the eyepiece system 15, near the position where the optical image of the object is formed by the relay lens system 25.
上記視野絞り２６は、接眼調整筒体２７の後端
側内周に嵌入され、止めねじ２８によつて所定の
位置にて固定された筒体の接眼枠２９の前端に形
成された凹部に取り付けられている。 The field stop 26 is fitted into the inner periphery of the rear end side of the eyepiece adjusting cylinder 27 and is attached to a recess formed at the front end of the eyepiece frame 29 of the cylinder, which is fixed at a predetermined position with a set screw 28. It is being
上記接眼枠２９の前端に形成した凹部に隣接す
る後方部分は内周面が段部状に細径の突部３０が
形成されて、該突部３０によつて円状の視野範囲
が形成されるように構成され、この最も細径ｒの
部分内周面は精密加工がなされ、この部分から後
方にテーパ状に拡径にされて所定の内径を有する
筒状の接眼枠２９が形成されている。 In the rear portion adjacent to the recess formed at the front end of the eyepiece frame 29, a narrow diameter protrusion 30 is formed with a step-like inner peripheral surface, and a circular viewing range is formed by the protrusion 30. The inner peripheral surface of the part with the smallest diameter r is precisely machined, and the diameter of this part is tapered rearward to form a cylindrical eyepiece frame 29 having a predetermined inner diameter. There is.
一方、上記接眼枠２９の後端側には、接眼レン
ズ系１５がレンズ固定枠３１によつて固定され、
その後方のアイピース３２に形成された開口部に
はカバーガラス３３がカバーガラス固定枠３４を
取付枠３５外周に圧入することにより挾持される
ように固定されている。 On the other hand, the eyepiece system 15 is fixed to the rear end side of the eyepiece frame 29 by a lens fixing frame 31,
A cover glass 33 is fixed to an opening formed in the eyepiece 32 at the rear thereof so as to be clamped by press-fitting a cover glass fixing frame 34 into the outer periphery of a mounting frame 35 .
上記接眼枠２９の前端凹部に取付けられる視野
絞り２６は、第４図つまり第３図におけるＡ−Ａ
線断面図で示すように、エツチングにより腐食さ
せて形成される中央の円状中空部２６Ａの径Ｒ
は、前記突部３０内周の（円状視野範囲となる）
径ｒよりわずかに大きく形成されているので、接
眼部１６後方から観察した場合には、第５図に示
すように視野絞り２６の円状内周面及び視野絞り
２６に形成された楔形の指標３６の裾部とは観察
されないように形成されている。 The field diaphragm 26 attached to the front end concave portion of the eyepiece frame 29 is shown in FIG.
As shown in the line cross-sectional view, the diameter R of the central circular hollow portion 26A formed by etching corrosion.
is the inner periphery of the protrusion 30 (a circular viewing range)
Since the diameter is slightly larger than the diameter r, when observed from behind the eyepiece 16, the circular inner peripheral surface of the field stop 26 and the wedge-shaped shape formed in the field stop 26 can be seen from the rear of the eyepiece 16, as shown in FIG. The bottom part of the indicator 36 is formed so as not to be observed.
従つて、エツチングによつて形成された見ずら
い視野絞り２６の内周面と、楔形指標３６におけ
る視野方向を表示する際の精度を低下する裾部が
遮蔽され、突部３０内周面に垂直部分３７のみが
視野内に表われるようにしてあるので、簡単な構
成によつて従来例における問題点が解消されてい
る。 Therefore, the inner circumferential surface of the field stop 26 that is difficult to see by etching and the skirt portion that reduces the accuracy of displaying the viewing direction on the wedge-shaped index 36 are shielded, and the inner circumferential surface of the protrusion 30 is shielded. Since only the vertical portion 37 appears within the field of view, the problems in the conventional example are solved by a simple configuration.
第６図は、第１実施例における視野絞り２６の
楔形指標３６を対称な形にした第２実施例におけ
る接眼部後方から観察した場合の視野を示す。 FIG. 6 shows the field of view when observed from behind the eyepiece in the second embodiment in which the wedge-shaped index 36 of the field stop 26 in the first embodiment is symmetrical.
この実施例においても、視野絞り４１の内径
を、上記接眼枠２９の前端に形成した凹部に隣接
した突部３０の内周の径ｒよりわずかに大きくし
てあるので、この視野絞り４１の内周面４１Ａ及
び対称な楔形指標４２の裾部は視野内に現われ
ず、指標４２の頂点部分のみが観察されるように
してあるので、第１実施例と同様に簡単な構成に
よつて、観察する際の美観を損うことなく、且つ
方向表示の精度を低下させることなく視野絞りと
しての機能を充分果すことができる。 In this embodiment as well, the inner diameter of the field stop 41 is made slightly larger than the diameter r of the inner circumference of the protrusion 30 adjacent to the recess formed at the front end of the eyepiece frame 29. The circumferential surface 41A and the hem of the symmetrical wedge-shaped index 42 do not appear in the field of view, and only the apex portion of the index 42 is observed. It is possible to fully perform the function as a field diaphragm without impairing the aesthetic appearance when displaying, and without reducing the accuracy of direction display.
第７図は第３実施例を示す。この実施例におい
ては、視野絞り２６が取付けられる凹部に隣接す
る突部３０は接眼枠２９に一体物として形成され
ているのではなく、該接眼枠２９の前端に形成さ
れた段部状凹部に圧入、螺着若しくは接着等によ
り取付けられた台座５１に形成されている。従つ
て、台座５１側に第１実施例の突部３０が形成さ
れており、該台座５１を上記接眼枠２９に取付け
た状態は、第１実施例を同様になる。その作用効
果も略同様となる。 FIG. 7 shows a third embodiment. In this embodiment, the protrusion 30 adjacent to the recess in which the field stop 26 is mounted is not formed integrally with the eyepiece frame 29, but is formed in a step-like recess formed at the front end of the eyepiece frame 29. It is formed on a pedestal 51 attached by press fitting, screwing, adhesion, or the like. Therefore, the protrusion 30 of the first embodiment is formed on the pedestal 51 side, and the state in which the pedestal 51 is attached to the eyepiece frame 29 is the same as that of the first embodiment. The effects are also substantially the same.
第８図は、上記第７図に示す台座５１を前後を
逆にして取付けた第４実施例を示す。 FIG. 8 shows a fourth embodiment in which the pedestal 51 shown in FIG. 7 is mounted with the front and back reversed.
この他の各部は第３実施例と同様であり、その
作用効果も略同様のものとなる。 The other parts are the same as those in the third embodiment, and the effects are also substantially the same.
第９図は、軟性内視鏡における像伝達手段とし
て広く用いられているイメージガイドフアイバの
場合に適用した第５実施例を示す。 FIG. 9 shows a fifth embodiment applied to an image guide fiber widely used as an image transmission means in flexible endoscopes.
この実施例における軟性内視鏡においては、第
１図に示すような挿入部先端側に配設された対物
レンズ系で結像された対象物の光学像は、筒状保
持枠６１内に挿通された口金６２内に配設された
イメージガイドフアイバ６３の図示しない先端側
端面に結像される。該端面に結像された光学像は
イメージガイドフアイバ６３によつて後端部６３
Ａ側に伝達され、該後端部６３Ａ後方の図示しな
い接眼レンズ系後方から挿入部前方の対象物を観
察できるように構成されている。 In the flexible endoscope of this embodiment, the optical image of the object formed by the objective lens system disposed on the distal end side of the insertion section as shown in FIG. An image is formed on an end surface (not shown) of an image guide fiber 63 disposed in a cap 62. The optical image formed on the end face is transferred to the rear end 63 by the image guide fiber 63.
The information is transmitted to the A side, and the object in front of the insertion section can be observed from behind an eyepiece system (not shown) behind the rear end portion 63A.
上記イメージガイドフアイバ６３を内挿した口
金６２は止ねじ６４によつて保持枠６１内に固定
され、イメージガイドフアイバ６３後端面６３Ａ
と略面一となる保持枠６１後端には第１０図に示
すような視野絞り２６′が台座６５によつて挾持
するように取付けられている。 The base 62 into which the image guide fiber 63 is inserted is fixed in the holding frame 61 by a set screw 64, and the rear end surface 63A of the image guide fiber 63 is fixed to the holding frame 61 by a set screw 64.
A field diaphragm 26' as shown in FIG.
上記台座６５は、略環状で、後端側は段部状に
細径にされた突部６６が形成され、該突部６６の
最も細径の部分から後方側にテーパ状に拡開され
ている。この台座６５の前端側は前記保持枠６１
外周に嵌合し、止めねじ６７によつて固定されて
いる。 The pedestal 65 has a substantially annular shape, and a stepped portion 66 with a narrow diameter is formed on the rear end side, and the projection 66 tapers outward from the narrowest diameter portion. There is. The front end side of this pedestal 65 is connected to the holding frame 61.
It fits around the outer periphery and is fixed by a set screw 67.
上記保持枠６１後端あるいはイメージガイドフ
アイバ６３の後端面６３Ａ外周に取付けられた視
野絞り２６′と台座６５の突部６６の関係は前述
した各実施例と同様である。つまり突部６６の内
の最も細径にされた内径は、視野絞り２６′の内
径よりわずかに小さく形成され、接眼部後方から
観察した視野範囲は上記突部６６内径で決定さ
れ、その視野範囲内に楔形等の指標３６′の一部
が観察されるように構成されている。 The relationship between the field stop 26' attached to the rear end of the holding frame 61 or the outer periphery of the rear end surface 63A of the image guide fiber 63 and the protrusion 66 of the pedestal 65 is the same as in each of the embodiments described above. In other words, the narrowest inner diameter of the protrusion 66 is formed to be slightly smaller than the inner diameter of the field stop 26', and the field of view observed from the rear of the eyepiece is determined by the inner diameter of the protrusion 66. It is configured such that a part of the indicator 36', such as a wedge shape, can be observed within the range.
この実施例の作用効果も前述したものと略同様
である。 The effects of this embodiment are also substantially the same as those described above.
上述の各実施例において視野絞り２６，２６′
の内径が該視野絞り２６，２６′に隣接して若し
くは近接して形成された突部の最も細径となる内
径より大きく形成されていることが本考案の特徴
であつて、視野絞り２６，４１，２６′に設けら
れた指標３６，４２，３６′については上述の例
に限定されるものでないし、突部３０，６６が段
部状あるいはテーパ状等これらの形状に限定され
るものではない。又、上述においては視野範囲が
円状として説明してあるが場合によつては正方形
等の形状でも良い。 In each of the embodiments described above, the field stop 26, 26'
A feature of the present invention is that the inner diameter of the field stops 26, 26' is larger than the smallest inner diameter of the protrusions formed adjacent to or close to the field stops 26, 26'. The indicators 36, 42, 36' provided on the 41, 26' are not limited to the above-mentioned examples, and the protrusions 30, 66 are not limited to these shapes such as stepped or tapered shapes. do not have. Further, in the above description, the field of view is described as having a circular shape, but depending on the case, the field of view may have a shape such as a square.
又、本考案は硬性内視鏡のみならず軟性内視鏡
にも適用できることは勿論であるし、直視型、斜
視型及び側視型いずれの内視鏡においても適用で
きるものである。 Furthermore, it goes without saying that the present invention can be applied not only to rigid endoscopes but also to flexible endoscopes, and can be applied to any of the direct-viewing type, strabismus-viewing type, and side-viewing type endoscopes.
以上述べたように本考案によれば、視野範囲を
視野絞りの近傍の部材で形成し、視野絞りの内径
をわずかに大きく形成してあるので、エツチング
加工による視野絞りを用いてもその内周の凹凸が
遮蔽されて観察の際美観を損うことがないという
利点を有する。又、視野絞りに形成される指標の
裾部も遮蔽されるので、視野における対象物の方
向を精度良く視認することができるという利点を
有する。 As described above, according to the present invention, the field of view is formed by a member near the field diaphragm, and the inner diameter of the field diaphragm is made slightly larger. This has the advantage that the unevenness of the surface is shielded and the aesthetic appearance is not impaired during observation. Furthermore, since the tail portion of the index formed on the field stop is also shielded, there is an advantage that the direction of the object in the field of view can be visually confirmed with high accuracy.
第１図は従来例における視野絞りを示す概略正
面図、第２図ないし第５図は第１実施例に係り、
第２図は第１実施例を適用した硬性内視鏡を一部
切り欠いて示す側面図、第３図は第１実施例の要
部周辺を示す断面図、第４図は第３図におけるＡ
−Ａ線断面図、第５図は第１実施例を接眼部後方
から観察した場合の視野を示す説明図、第６図は
第２実施例における視野を示す説明図、第７図は
第３実施例の要部周辺を示す断面図、第８図は第
４実施例の要部周辺を示す断面図、第９図及び第
１０図は第５実施例に係り、第９図は第５実施例
の要部断面図、第１０図は第５実施例における視
野絞りの形状を示す斜視図である。
１１……硬性内視鏡、１５……接眼レンズ系、
２５……リレーレンズ系、２６，２６′，４１…
…視野絞り、２９……接眼枠、３０，６６……突
部、３６，３６′，４２……指標、５１，６５…
…台座、６３……イメージガイドフアイバ。
FIG. 1 is a schematic front view showing a field stop in a conventional example, and FIGS. 2 to 5 relate to the first embodiment.
Fig. 2 is a partially cutaway side view of a rigid endoscope to which the first embodiment is applied, Fig. 3 is a sectional view showing the vicinity of the main part of the first embodiment, and Fig. 4 is the same as that shown in Fig. 3. A
5 is an explanatory diagram showing the visual field when observing the first embodiment from behind the eyepiece, FIG. 6 is an explanatory diagram showing the visual field in the second embodiment, and FIG. 7 is an explanatory diagram showing the visual field in the second embodiment. FIG. 8 is a cross-sectional view showing the vicinity of the main part of the fourth embodiment, FIGS. 9 and 10 relate to the fifth embodiment, and FIG. FIG. 10 is a cross-sectional view of the main part of the embodiment, and a perspective view showing the shape of the field stop in the fifth embodiment. 11... Rigid endoscope, 15... Eyepiece system,
25... Relay lens system, 26, 26', 41...
...Field diaphragm, 29...Eyepiece frame, 30, 66...Protrusion, 36, 36', 42...Indicator, 51, 65...
...Pedestal, 63...Image guide fiber.
Claims (1)
段を介し、視野範囲を形成する中空視野部を有
する枠状の視野絞り後方の接眼レンズを通して
観察できるように構成された内視鏡において、 前記視野絞りに、視野内に突出する楔形の指
標を設け、前記視野絞りを取り付ける凹部を設
けた中空部材若しくは該凹部周辺の中空部材
に、視野絞りの中空視野部内周面を遮蔽すると
ともに、前記楔形指標の裾部を遮蔽する内側に
突出する突部を形成したことを特徴とする内視
鏡の視野絞り装置。 (2) 前記内側に突出する突部は、視野絞りに隣接
する前方若しくは後方に設けたことを特徴とす
る実用新案登録請求の範囲第１項記載の内視鏡
の視野絞り装置。[Claims for Utility Model Registration] (1) The optical image formed by the objective optical system is observed through an eyepiece behind a frame-shaped field stop that has a hollow field part that forms a field of view via an image transmission means. In the endoscope, the field diaphragm is provided with a wedge-shaped index protruding into the field of view, and the field diaphragm is attached to a hollow member provided with a recess for attaching the field diaphragm, or a hollow member around the recess. A field diaphragm device for an endoscope, characterized in that a protrusion protruding inward is formed to shield an inner circumferential surface of the hollow field part and a bottom portion of the wedge-shaped index. (2) The field diaphragm device for an endoscope according to claim 1, wherein the inwardly protruding protrusion is provided at the front or rear adjacent to the field diaphragm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6465482U JPS58166615U (en) | 1982-04-30 | 1982-04-30 | Endoscope field aperture device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6465482U JPS58166615U (en) | 1982-04-30 | 1982-04-30 | Endoscope field aperture device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS58166615U JPS58166615U (en) | 1983-11-07 |
| JPH0228491Y2 true JPH0228491Y2 (en) | 1990-07-31 |
Family
ID=30074671
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6465482U Granted JPS58166615U (en) | 1982-04-30 | 1982-04-30 | Endoscope field aperture device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS58166615U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002253485A (en) * | 2001-03-05 | 2002-09-10 | Olympus Optical Co Ltd | Endoscope |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6111118U (en) * | 1984-06-22 | 1986-01-23 | 富士写真光機株式会社 | Objective lens optical system for endoscopes |
-
1982
- 1982-04-30 JP JP6465482U patent/JPS58166615U/en active Granted
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002253485A (en) * | 2001-03-05 | 2002-09-10 | Olympus Optical Co Ltd | Endoscope |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS58166615U (en) | 1983-11-07 |
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