JP6046322B1 - 内視鏡用変倍光学系及び内視鏡 - Google Patents
内視鏡用変倍光学系及び内視鏡 Download PDFInfo
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- JP6046322B1 JP6046322B1 JP2016558153A JP2016558153A JP6046322B1 JP 6046322 B1 JP6046322 B1 JP 6046322B1 JP 2016558153 A JP2016558153 A JP 2016558153A JP 2016558153 A JP2016558153 A JP 2016558153A JP 6046322 B1 JP6046322 B1 JP 6046322B1
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- lens
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-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B23/00—Telescopes, e.g. binoculars; Periscopes; Instruments for viewing the inside of hollow bodies; Viewfinders; Optical aiming or sighting devices
- G02B23/24—Instruments or systems for viewing the inside of hollow bodies, e.g. fibrescopes
- G02B23/2407—Optical details
- G02B23/2423—Optical details of the distal end
- G02B23/243—Objectives for endoscopes
- G02B23/2438—Zoom objectives
-
- 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
-
- 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
-
- 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
- A61B1/00186—Optical arrangements with imaging filters
-
- 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
- A61B1/00163—Optical arrangements
- A61B1/00188—Optical arrangements with focusing or zooming features
- A61B1/0019—Optical arrangements with focusing or zooming features characterised by variable lenses
-
- 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
- A61B1/04—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 combined with photographic or television appliances
- A61B1/05—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 combined with photographic or television appliances characterised by the image sensor, e.g. camera, being in the distal end portion
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B15/00—Optical objectives with means for varying the magnification
- G02B15/14—Optical objectives with means for varying the magnification by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective
- G02B15/143—Optical objectives with means for varying the magnification by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective having three groups only
- G02B15/1435—Optical objectives with means for varying the magnification by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective having three groups only the first group being negative
- G02B15/143503—Optical objectives with means for varying the magnification by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective having three groups only the first group being negative arranged -+-
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B15/00—Optical objectives with means for varying the magnification
- G02B15/14—Optical objectives with means for varying the magnification by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective
- G02B15/143—Optical objectives with means for varying the magnification by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective having three groups only
- G02B15/1435—Optical objectives with means for varying the magnification by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective having three groups only the first group being negative
- G02B15/143507—Optical objectives with means for varying the magnification by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective having three groups only the first group being negative arranged -++
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B15/00—Optical objectives with means for varying the magnification
- G02B15/14—Optical objectives with means for varying the magnification by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B15/00—Optical objectives with means for varying the magnification
- G02B15/14—Optical objectives with means for varying the magnification by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective
- G02B15/16—Optical objectives with means for varying the magnification by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective with interdependent non-linearly related movements between one lens or lens group, and another lens or lens group
Abstract
Description
20<fs1/fw<50
1.2<ft/fw<1.5
を満たす。
5<|fs1/f1|<20
に置き換えることができる。
2<f2/fw<5
を満たす構成としてもよい。
5<f3/fw<20
を満たす構成としてもよい。
−4<f1/fw<−2
を満たす構成としてもよい。
20<fs1/fw<50・・・(1)
1.2<ft/fw<1.5・・・(2)
を満たす構成となっている。
5<|fs1/f1|<20・・・(3)
2<f2/fw<5・・・(4)
を満たす構成となっている。
5<f3/fw<20・・・(5)
を満たす構成となっている。
−4<f1/fw<−2・・・(6)
を満たす構成となっている。
表6は、本実施例1〜5の各実施例において、条件式(1)〜(6)の各条件式を適用したときに算出される値の一覧表である。
Claims (8)
- 物体から順に、負のパワーを持つ第一のレンズ群、正のパワーを持つ第二のレンズ群、第三のレンズ群からなり、該第一のレンズ群の最も物体側のレンズ面から像面までの距離を一定に保ちながら、固定レンズ群である該第一のレンズ群及び該第三のレンズ群に対して該第二のレンズ群を光軸方向に移動させることで光学像を変倍させる内視鏡用変倍光学系において、
前記第一のレンズ群は、
物体側から順に、像側に凹面を向けた負レンズ、物体側に凹面を向けた正メニスカスレンズを少なくとも有し、
前記第二のレンズ群は、
物体側から順に、物体側に凸面を向けたメニスカスレンズと、負レンズ及び正レンズを接合した接合レンズとを少なくとも有し、
前記第三のレンズ群は、
物体側に凸面を向けた正レンズを少なくとも有し、
前記第一のレンズ群が有する前記メニスカスレンズの焦点距離をfs1(単位:mm)と定義し、広角端での該第一から該第三のレンズ群の合成焦点距離をfw(単位:mm)と定義し、望遠端での該第一から該第三のレンズ群の合成焦点距離をft(単位:mm)と定義した場合に、次の2つの条件式
20<fs1/fw<50
1.2<ft/fw<1.5
を満たす、
内視鏡用変倍光学系。 - 物体から順に、負のパワーを持つ第一のレンズ群、正のパワーを持つ第二のレンズ群、第三のレンズ群からなり、該第一のレンズ群の最も物体側のレンズ面から像面までの距離を一定に保ちながら、固定レンズ群である該第一のレンズ群及び該第三のレンズ群に対して該第二のレンズ群を光軸方向に移動させることで光学像を変倍させる内視鏡用変倍光学系において、
前記第一のレンズ群は、
物体側から順に、像側に凹面を向けた負レンズ、物体側に凹面を向けた正メニスカスレンズを少なくとも有し、
前記第二のレンズ群は、
物体側から順に、物体側に凸面を向けたメニスカスレンズと、負レンズ及び正レンズを接合した接合レンズとを少なくとも有し、
前記第三のレンズ群は、
物体側に凸面を向けた正レンズを少なくとも有し、
前記第一のレンズ群が有する前記メニスカスレンズの焦点距離をfs1(単位:mm)と定義し、該第一群のレンズ群の焦点距離をf1(単位:mm)と定義し、広角端での該第一から前記第三のレンズ群の合成焦点距離をfw(単位:mm)と定義し、望遠端での該第一から該第三のレンズ群の合成焦点距離をft(単位:mm)と定義した場合に、次の2つの条件式
5<|fs1/f1|<20
1.2<ft/fw<1.5
を満たす、
内視鏡用変倍光学系。 - 前記第二群のレンズ群の焦点距離をf2(単位:mm)と定義した場合に、次の条件式
2<f2/fw<5
を満たす、
請求項1又は請求項2に記載の内視鏡用変倍光学系。 - 前記第三群のレンズ群の焦点距離をf3(単位:mm)と定義した場合に、次の条件式
5<f3/fw<20
を満たす、
請求項1から請求項3の何れか一項に記載の内視鏡用変倍光学系。 - 前記第一群のレンズ群の焦点距離をf1(単位:mm)と定義した場合に、次の条件式
−4<f1/fw<−2
を満たす、
請求項1から請求項4の何れか一項に記載の内視鏡用変倍光学系。 - 前記第一と前記第二のレンズ群との間に光軸上を該第二のレンズ群と一体に移動する絞りを有する、
請求項1から請求項5の何れか一項に記載の内視鏡用変倍光学系。 - 画角が120°以上である、
請求項1から請求項6の何れか一項に記載の内視鏡用変倍光学系。 - 請求項1から請求項7の何れか一項に記載の内視鏡用変倍光学系が先端に組み込まれた、
内視鏡。
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/JP2016/055250 WO2017145264A1 (ja) | 2016-02-23 | 2016-02-23 | 内視鏡用変倍光学系及び内視鏡 |
Publications (2)
Publication Number | Publication Date |
---|---|
JP6046322B1 true JP6046322B1 (ja) | 2016-12-14 |
JPWO2017145264A1 JPWO2017145264A1 (ja) | 2018-03-01 |
Family
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Family Applications (1)
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JP2016558153A Active JP6046322B1 (ja) | 2016-02-23 | 2016-02-23 | 内視鏡用変倍光学系及び内視鏡 |
Country Status (5)
Country | Link |
---|---|
US (1) | US10088666B2 (ja) |
EP (1) | EP3321722B1 (ja) |
JP (1) | JP6046322B1 (ja) |
CN (1) | CN107615129B (ja) |
WO (1) | WO2017145264A1 (ja) |
Families Citing this family (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN107076967B (zh) * | 2015-09-07 | 2020-09-01 | Hoya株式会社 | 内窥镜用变倍光学系统及内窥镜 |
WO2017145265A1 (ja) | 2016-02-23 | 2017-08-31 | Hoya株式会社 | 内視鏡用変倍光学系及び内視鏡 |
WO2017145208A1 (ja) | 2016-02-24 | 2017-08-31 | パナソニックIpマネジメント株式会社 | ズームレンズ系、ズームレンズ系を有する撮像装置及び撮像装置を有する車両 |
JP2019049680A (ja) | 2017-09-12 | 2019-03-28 | Hoya株式会社 | 内視鏡用対物レンズユニット及び内視鏡 |
JP6861131B2 (ja) | 2017-09-12 | 2021-04-21 | Hoya株式会社 | 内視鏡用対物レンズユニット及び内視鏡 |
JP6899030B2 (ja) * | 2018-03-22 | 2021-07-07 | オリンパス株式会社 | 対物光学系、撮像装置、内視鏡、及び内視鏡システム |
CN108761766B (zh) * | 2018-05-29 | 2023-08-04 | 浙江大学 | 具备光学放大功能的内窥镜物镜 |
CN112731638B (zh) * | 2020-12-31 | 2022-08-16 | 上海澳华内镜股份有限公司 | 一种内窥镜光学系统 |
CN117192755B (zh) * | 2023-11-08 | 2024-01-05 | 国药新光医疗科技有限公司 | 一种内窥镜用变焦镜头组件 |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2005292403A (ja) * | 2004-03-31 | 2005-10-20 | Konica Minolta Opto Inc | 変倍光学系、撮像レンズ装置及びデジタル機器 |
JP2007093961A (ja) * | 2005-09-28 | 2007-04-12 | Fujinon Corp | 2焦点切替型結像レンズ |
JP2014145869A (ja) * | 2013-01-29 | 2014-08-14 | Canon Inc | ズームレンズ及びそれを有する撮像装置 |
Family Cites Families (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP4229754B2 (ja) * | 2003-05-15 | 2009-02-25 | オリンパス株式会社 | 対物レンズ及びそれを用いた内視鏡 |
JP2005168770A (ja) * | 2003-12-10 | 2005-06-30 | Olympus Corp | 内視鏡 |
CN100385283C (zh) * | 2005-02-21 | 2008-04-30 | 富士能株式会社 | 广角摄像透镜 |
CN1327264C (zh) * | 2005-09-15 | 2007-07-18 | 上海交通大学 | 共焦内窥镜微小显微物镜探头 |
EP1818710A3 (en) * | 2006-02-14 | 2008-08-27 | Fujinon Corporation | Objective lens for endoscope |
JP4653823B2 (ja) * | 2008-06-06 | 2011-03-16 | オリンパスメディカルシステムズ株式会社 | 対物光学系 |
EP2420880B1 (en) | 2009-04-16 | 2015-12-02 | Olympus Corporation | Objective optical system |
JP4834799B2 (ja) * | 2009-05-26 | 2011-12-14 | オリンパスメディカルシステムズ株式会社 | 内視鏡の対物レンズ |
CN102667570B (zh) * | 2009-12-24 | 2014-12-10 | 奥林巴斯医疗株式会社 | 内窥镜用物镜及使用该内窥镜用物镜的内窥镜 |
JP5580956B1 (ja) | 2013-03-26 | 2014-08-27 | オリンパスメディカルシステムズ株式会社 | 内視鏡用光学系 |
WO2014155821A1 (ja) | 2013-03-26 | 2014-10-02 | オリンパスメディカルシステムズ株式会社 | 内視鏡用光学系 |
-
2016
- 2016-02-23 CN CN201680001203.XA patent/CN107615129B/zh active Active
- 2016-02-23 EP EP16778180.6A patent/EP3321722B1/en active Active
- 2016-02-23 US US15/304,274 patent/US10088666B2/en active Active
- 2016-02-23 WO PCT/JP2016/055250 patent/WO2017145264A1/ja active Application Filing
- 2016-02-23 JP JP2016558153A patent/JP6046322B1/ja active Active
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2005292403A (ja) * | 2004-03-31 | 2005-10-20 | Konica Minolta Opto Inc | 変倍光学系、撮像レンズ装置及びデジタル機器 |
JP2007093961A (ja) * | 2005-09-28 | 2007-04-12 | Fujinon Corp | 2焦点切替型結像レンズ |
JP2014145869A (ja) * | 2013-01-29 | 2014-08-14 | Canon Inc | ズームレンズ及びそれを有する撮像装置 |
Also Published As
Publication number | Publication date |
---|---|
JPWO2017145264A1 (ja) | 2018-03-01 |
CN107615129B (zh) | 2019-09-13 |
EP3321722A1 (en) | 2018-05-16 |
US10088666B2 (en) | 2018-10-02 |
US20180017779A1 (en) | 2018-01-18 |
EP3321722B1 (en) | 2020-06-03 |
EP3321722A4 (en) | 2019-02-27 |
CN107615129A (zh) | 2018-01-19 |
WO2017145264A1 (ja) | 2017-08-31 |
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