JP2012213440A - 電子内視鏡 - Google Patents
電子内視鏡 Download PDFInfo
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- JP2012213440A JP2012213440A JP2011079256A JP2011079256A JP2012213440A JP 2012213440 A JP2012213440 A JP 2012213440A JP 2011079256 A JP2011079256 A JP 2011079256A JP 2011079256 A JP2011079256 A JP 2011079256A JP 2012213440 A JP2012213440 A JP 2012213440A
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B1/00—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor
- A61B1/00163—Optical arrangements
- A61B1/00174—Optical arrangements characterised by the viewing angles
- A61B1/00181—Optical arrangements characterised by the viewing angles for multiple fixed viewing angles
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B1/00—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor
- A61B1/00064—Constructional details of the endoscope body
- A61B1/00071—Insertion part of the endoscope body
- A61B1/0008—Insertion part of the endoscope body characterised by distal tip features
- A61B1/00096—Optical elements
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B1/00—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor
- A61B1/00163—Optical arrangements
- A61B1/00174—Optical arrangements characterised by the viewing angles
- A61B1/00177—Optical arrangements characterised by the viewing angles for 90 degrees side-viewing
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B1/00—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor
- A61B1/00163—Optical arrangements
- A61B1/00188—Optical arrangements with focusing or zooming features
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B1/00—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor
- A61B1/06—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor with illuminating arrangements
- A61B1/0623—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor with illuminating arrangements for off-axis illumination
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- Public Health (AREA)
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- Instruments For Viewing The Inside Of Hollow Bodies (AREA)
- Endoscopes (AREA)
Abstract
【解決手段】電子内視鏡に設けられた先端部16aには、凹み部26と、先端面27とが形成されている。先端部16aは、側視観察光学系47及び直視観察光学系48を備える。側視観察光学系47は、側視観察レンズ28、プリズム41、ズームレンズ42からなる。側視観察レンズ28からの入射光はプリズム41のハーフミラー41aで反射する。ズームレンズ42及びCCD44は、プリズム41の出射面41b側に位置する。側視観察光学系47は、通常観察及び拡大観察の間で焦点距離が切り換えられる。側視方向Sにおける側視観察レンズ28の表面の位置と、外周面25の延長線上の位置との間に所定距離Lを有する。側視観察光学系47による拡大観察時、ベストピント位置BPが、外周面25の延長線上に一致するように距離Lが設定されている。
【選択図】図3
Description
11 電子内視鏡
16 挿入部
16a,80 先端部
25,85 外周面
26,86 凹み部
28,88 側視観察レンズ
29,89 側視照明レンズ
32 第1の凹み面
33 第2の凹み面
34,90 直視観察レンズ
41 プリズム
42,91 ズームレンズ
43,92 レンズ移動機構
44,83,84 CCD
47,81 側視観察光学系
48,82 直視観察光学系
Claims (10)
- 被検体内に挿入される挿入部の先端部に形成され、前記先端部の外周面の一部を切り欠いた凹み部と、
前記凹み部に設けられ、挿入方向と直交する側視方向からの像光を取り込んで観察を行うための側視観察光学系と、
前記側視観察光学系の焦点距離を、通常観察及び拡大観察の間で可変させる焦点可変手段と、
前記側視観察光学系により取り込まれた観察範囲の像光が結像される撮像素子と、
を備えた電子内視鏡において、
前記側視観察光学系は、拡大観察時のベストピント位置が、前記側視方向における前記外周面の延長線上に一致することを特徴とする電子内視鏡。 - 前記側視観察光学系の観察範囲に照明光を照射するための側視照明光学系を備え、
前記凹み部は、前記側視方向と直交する第1の凹み面と、前記外周面と前記第1の凹み面に困まれ、先端側に向かって傾斜する第2の凹み面とから形成され、
前記側視観察光学系は、前記第1の凹み面から露呈する位置に設けられ、
前記側視照明光学系は、前記第2の凹み面から露呈する位置に設けられることを特徴とする請求項1記載の電子内視鏡。 - 前記側視観察光学系は、
前記側視方向からの像光を取り込む側視観察レンズと、
前記側視観察レンズによる前記側視方向からの入射光を直交する方向へ反射させて前記撮像素子に結像させる光路変換部材とを備えることを特徴とする請求項1又は2項記載の電子内視鏡。 - 前記先端部の先端側に形成され、前記凹み部の先端と連続し、挿入方向と直交する先端面と、
挿入方向と平行な直視方向からの像光を取り込むための直視観察光学系とを備え、
前記直視観察光学系は、前記先端面から露呈する位置に設けられる直視観察レンズから構成され、
前記光路変換部材は、ハーフミラーであり、前記直視観察レンズにより取り込まれた前記直視方向からの入射光を透過させて前記撮像素子に結像させることを特徴とする請求項3記載の電子内視鏡。 - 前記直視観察光学系及び前記側視観察光学系のいずれか一方に入射される入射光を透過させ、他方に入射される入射光を遮断する切り換え手段を備えることを特徴とする請求項4記載の電子内視鏡。
- 前記切り換え手段は、前記直視観察光学系及び前記側視観察光学系にそれぞれ設けられ、入射光を遮断する遮光状態と、入射光を透過させる透過状態との間で切り換えられる液晶パネルであることを特徴とする請求項5記載の電子内視鏡。
- 前記焦点可変手段は、前記側視観察レンズ及び前記光路変換部材とともに前記側視観察光学系を構成するズームレンズと、前記ズームレンズを光軸方向に沿って移動させるズームレンズ移動手段とからなることを特徴とする請求項3ないし6いずれか1項記載の電子内視鏡。
- 前記ズームレンズは、前記光路変換部材と、前記撮像素子との間に配置されることを特徴とする請求項7項記載の電子内視鏡。
- 前記先端面に設けられ、前記直視観察光学系による観察範囲を照明するための直視照明光学系を備えていることを特徴とする請求項4ないし9いずれか1項記載の電子内視鏡。
- 前記側視観察光学系は、通常観察時の被写界深度の範囲内に、前記側視方向における前記外周面の延長線上が位置することを特徴とする請求項1ないし9いずれか1項記載の電子内視鏡。
Priority Applications (2)
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JP2011079256A JP5318142B2 (ja) | 2011-03-31 | 2011-03-31 | 電子内視鏡 |
US13/407,284 US8602979B2 (en) | 2011-03-31 | 2012-02-28 | Electronic endoscope having front-view and side-view image capturing |
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JP2011079256A JP5318142B2 (ja) | 2011-03-31 | 2011-03-31 | 電子内視鏡 |
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JP5318142B2 JP5318142B2 (ja) | 2013-10-16 |
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JP2020114388A (ja) * | 2014-07-21 | 2020-07-30 | エンドチョイス インコーポレイテッドEndochoice, Inc. | 多焦点マルチカメラ内視鏡システム |
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US20120253121A1 (en) | 2012-10-04 |
JP5318142B2 (ja) | 2013-10-16 |
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