JP6368065B1 - 内視鏡対物光学系 - Google Patents
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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
-
- 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
- A61B1/00002—Operational features of endoscopes
- A61B1/00004—Operational features of endoscopes characterised by electronic signal processing
- A61B1/00009—Operational features of endoscopes characterised by electronic signal processing of image signals during a use of endoscope
-
- 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
-
- 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
- A61B1/051—Details of CCD assembly
-
- 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
- A61B1/307—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 for the urinary organs, e.g. urethroscopes, cystoscopes
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B13/00—Optical objectives specially designed for the purposes specified below
- G02B13/001—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras
- G02B13/0055—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras employing a special optical element
- G02B13/006—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras employing a special optical element at least one element being a compound optical element, e.g. cemented elements
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B13/00—Optical objectives specially designed for the purposes specified below
- G02B13/04—Reversed telephoto objectives
-
- 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
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B9/00—Optical objectives characterised both by the number of the components and their arrangements according to their sign, i.e. + or -
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- G02B9/14—Optical objectives characterised both by the number of the components and their arrangements according to their sign, i.e. + or - having three components only arranged + - +
- G02B9/18—Optical objectives characterised both by the number of the components and their arrangements according to their sign, i.e. + or - having three components only arranged + - + only one component having a compound lens
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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
- A61B1/00186—Optical arrangements with imaging filters
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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
- A61B1/06—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
- A61B1/0661—Endoscope light sources
- A61B1/0676—Endoscope light sources at distal tip of an endoscope
-
- G—PHYSICS
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- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
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- G02B9/34—Optical objectives characterised both by the number of the components and their arrangements according to their sign, i.e. + or - having four components only
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Abstract
Description
空気中画角 180° 160° 140° 120°
水中画角 97.2° 95.3° 89.7° 81.0°
物体側から順に、負の屈折力を有する前群と、明るさ絞りと、正の屈折力を有する後群と、からなり、
前群または後群に、1つ以上の接合レンズを有し、
接合レンズは、正の屈折力を有するレンズと、負の屈折力を有するレンズと、を有し、
後群は、物体側に単レンズの正レンズを有し、
以下の条件式(1)、(2)、(3)、(4)を満足することを特徴とする。
1.1<Ih/ft<1.8 (1)
−ff/ft<0.9 (2)
45<νd1 (3)
L0s/Ih<1.5 (4)
ここで、
Ihは、水中観察状態での最大像高、
ftは、内視鏡対物光学系全系の焦点距離、
ffは、前群の焦点距離、
νd1は、後群の物体側の正レンズの硝材のアッベ数、
L0sは、内視鏡対物光学系の物体側の第1面から明るさ絞りまでの間隔、
内視鏡対物光学系の物体側の第1面は、内視鏡対物光学系において最も物体側に位置するレンズ面、
である。
1.1<Ih/ft<1.8 (1)
−ff/ft<0.9 (2)
45<νd1 (3)
L0s/Ih<1.5 (4)
ここで、
Ihは、最大像高、
ftは、内視鏡対物光学系全系の焦点距離、
ffは、前群GFの焦点距離、
νd1は、後群GFの物体側の正の第3レンズL3の硝材のアッベ数、
L0sは、内視鏡対物光学系の物体側の第1面r1から明るさ絞りSまでの間隔、
内視鏡対物光学系の物体側の第1面r1は、内視鏡対物光学系において最も物体側に位置するレンズ面r1、
である。
1.1<Ih/ft<1.8 (1)
−ff/ft<0.9 (2)
45<νd1 (3)
L0s/Ih<1.5 (4)
ここで、
Ihは、最大像高、
ftは、内視鏡対物光学系全系の焦点距離、
ffは、前群GFの焦点距離、
νd1は、後群GRの物体側の正の第3レンズL3の硝材のアッベ数、
L0sは、内視鏡対物光学系の物体側の第1面r1から明るさ絞りSまでの間隔、
内視鏡対物光学系の物体側の第1面r1は、内視鏡対物光学系において最も物体側に位置するレンズ面r1、
である。
L2s/L0s<1.7 (5)
ここで、
L2sは、明るさ絞りSから、後群の像側の正の第4レンズL4の物体側面までの間隔、
L0sは、内視鏡対物光学系の物体側の第1面r1から明るさ絞りSまでの間隔、
である。
0<R1/R2<0.7 (6)
ここで、
R1は、後群GRの物体側の正の第3レンズL3の像側曲率半径、
R2は、後群GRの像側の正の第4レンズL4の像側曲率半径、
である。
実施例1に係る内視鏡対物光学系について説明する。図2(a)は、実施例1に係る内視鏡対物光学系のレンズ断面図である。図2(b)は球面収差(SA)、図2(c)は非点収差(AS)、図2(d)は歪曲収差(DT)、図2(e)は倍率色収差(CC)を示している。
次に、実施例2に係る内視鏡対物光学系について説明する。図3(a)は、実施例2に係る内視鏡対物光学系のレンズ断面図である。図3(b)は球面収差(SA)、図3(c)は非点収差(AS)、図3(d)は歪曲収差(DT)、図3(e)は倍率色収差(CC)を示している。
実施例3に係る内視鏡対物光学系について説明する。図4(a)は、実施例3に係る内視鏡対物光学系のレンズ断面図である。図4(b)は球面収差(SA)、図4(c)は非点収差(AS)、図4(d)は歪曲収差(DT)、図4(e)は倍率色収差(CC)を示している。
単位 mm
面データ
面番号 r d nd νd
1 ∞ 0.25 1.76820 71.79
2 0.600 0.50 1 -
3 -5.480 0.34 2.00330 28.27
4(絞り) ∞ 0.03 1 -
5 ∞ 0.91 1.64000 60.08
6 -0.836 0.05 1 -
7 ∞ 0.30 1.52100 65.13
8 ∞ 0.05 1 -
9 2.248 1.05 1.57099 50.80
10 -0.970 0.30 1.95906 17.47
11 -1.890 0.47 1 -
12 ∞ 1.19 1.51633 64.14
撮像面 ∞
各種データ
Ih 0.942
ft 0.703
ff -0.630
L0s 1.090
FNO 4.996
2ω 139.5
単位 mm
面データ
面番号 r d nd νd
1 ∞ 0.25 1.76820 71.79
2 0.639 0.51 1 -
3 -3.127 0.27 2.00330 28.27
4(絞り) ∞ 0.03 1 -
5 ∞ 0.89 1.58913 61.14
6 -0.961 0.08 1 -
7 ∞ 0.30 1.52100 65.13
8 ∞ 0.03 1 -
9 ∞ 0.51 1.88300 40.76
10 -2.500 0.05 1 -
11 2.665 0.89 1.63854 55.38
12 -1.817 0.30 1.95906 17.47
13 ∞ 0.47 1 -
14 ∞ 1.19 1.51633 64.14
撮像面 ∞
各種データ
Ih 0.942
ft 0.725
ff -0.579
L0s 1.030
L2s 1.300
FNO 5.191
2ω 138.4
単位 mm
面データ
面番号 r d nd νd
1 ∞ 0.27 1.88300 40.76
2 0.703 0.51 1 -
3 -2.186 0.31 1.88300 40.76
4(絞り) ∞ 0.03 1 -
5 ∞ 0.69 1.56384 60.67
6 -0.832 0.08 1 -
7 ∞ 0.30 1.52100 65.13
8 ∞ 0.03 1 -
9 ∞ 0.50 1.85026 32.27
10 -2.194 0.05 1 -
11 3.597 0.94 1.72916 54.68
12 -1.356 0.30 1.95906 17.47
13 ∞ 0.47 1 -
14 ∞ 1.19 1.51633 64.14
撮像面 ∞
各種データ
Ih 0.942
ft 0.725
ff -0.518
L0s 1.088
L2s 1.101
FNO 5.189
2ω 140.4
条件式 実施例1 実施例2 実施例3
(1) Ih/ft 1.339 1.299 1.299
(2) -ff/ft 0.896 0.798 0.714
(3) νd1 60.08 61.14 60.67
(4) L0s/Ih 1.157 1.093 1.155
(5) L2s/L0s - 1.262 1.012
(6) R1/R2 - 0.384 0.379
GR 後群
L1〜L6 レンズ
CL1 接合レンズ
S 明るさ絞り
F 光学フィルタ
CG ガラスブロック(カバーガラス)
I 撮像面(像面)
AX 光軸
Claims (5)
- 物体側から順に、負の屈折力を有する前群と、明るさ絞りと、正の屈折力を有する後群と、からなり、
前記前群または前記後群に、1つ以上の接合レンズを有し、
前記接合レンズは、正の屈折力を有するレンズと、負の屈折力を有するレンズと、を有し、
前記後群は、物体側に単レンズの正レンズを有し、
以下の条件式(1)、(2)、(3)、(4)を満足することを特徴とする内視鏡対物光学系。
1.1<Ih/ft<1.8 (1)
−ff/ft<0.9 (2)
45<νd1 (3)
L0s/Ih<1.5 (4)
ここで、
Ihは、水中観察状態での最大像高、
ftは、前記内視鏡対物光学系全系の焦点距離、
ffは、前記前群の焦点距離、
νd1は、前記後群の前記物体側の正レンズの硝材のアッベ数、
L0sは、前記内視鏡対物光学系の物体側の第1面から前記明るさ絞りまでの間隔、
前記内視鏡対物光学系の物体側の前記第1面は、前記内視鏡対物光学系において最も物体側に位置するレンズ面、
である。 - 前記後群は、前記物体側の正レンズよりも像側に、単レンズの正レンズを有し、以下の条件式(5)を満足することを特徴とする請求項1に記載の内視鏡対物光学系。
L2s/L0s<1.7 (5)
ここで、
L2sは、前記明るさ絞りから、前記後群の前記像側の正レンズの物体側面までの間隔、
L0sは、前記内視鏡対物光学系の物体側の前記第1面から前記明るさ絞りまでの間隔、
である。 - 前記後群の前記物体側の正レンズ及び前記像側の正レンズは、以下の条件式(6)を満足することを特徴とする請求項2に記載の内視鏡対物光学系。
0<R1/R2<0.7 (6)
ここで、
R1は、前記後群の前記物体側の正レンズの像側曲率半径、
R2は、前記後群の前記像側の正レンズの像側曲率半径、
である。 - 前記前群は、物体側から順に、第1の負レンズと、第2の負レンズと、を有し、前記第2の負レンズは、物体側に凹面を持つことを特徴とする請求項1に記載の内視鏡対物光学系。
- 前記水中観察と、空気中観察とが可能であることを特徴とする請求項1に記載の内視鏡対物光学系。
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JP2016190281 | 2016-09-28 | ||
JP2016190281 | 2016-09-28 | ||
PCT/JP2017/024801 WO2018061385A1 (ja) | 2016-09-28 | 2017-07-06 | 内視鏡対物光学系 |
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US (1) | US10942348B2 (ja) |
JP (1) | JP6368065B1 (ja) |
CN (1) | CN109416459B (ja) |
DE (1) | DE112017004856T5 (ja) |
WO (1) | WO2018061385A1 (ja) |
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JP7469576B2 (ja) * | 2018-11-27 | 2024-04-17 | 株式会社精工技研 | レンズユニット |
US11690497B2 (en) * | 2018-11-27 | 2023-07-04 | Fujikura Ltd. | Lens unit |
TWI806947B (zh) * | 2018-12-21 | 2023-07-01 | 佳能企業股份有限公司 | 光學鏡頭 |
JP7113783B2 (ja) * | 2019-04-25 | 2022-08-05 | 富士フイルム株式会社 | 内視鏡用対物光学系および内視鏡 |
KR102340488B1 (ko) * | 2019-12-27 | 2021-12-17 | 주식회사 세코닉스 | 광각 렌즈 시스템 |
CN111929877A (zh) * | 2020-09-09 | 2020-11-13 | 杭州有人光电技术有限公司 | 一种医用内窥镜光学变焦4k适配器 |
DE102021106839A1 (de) | 2020-10-02 | 2022-04-07 | Karl Storz Se & Co. Kg | Optisches System für ein Video-Endoskop und Video-Endoskop |
EP3977912B1 (en) | 2020-10-02 | 2024-01-31 | Karl Storz SE & Co. KG | Optical system for a video endoscope and video endoscope |
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JP2000330015A (ja) * | 1999-03-12 | 2000-11-30 | Fuji Photo Optical Co Ltd | 観察深度可変型の内視鏡用対物レンズ |
WO2014175038A1 (ja) * | 2013-04-22 | 2014-10-30 | オリンパスメディカルシステムズ株式会社 | 広角対物光学系 |
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US7796342B2 (en) | 2007-12-04 | 2010-09-14 | Fujifilm Corporation | Imaging lens system and capsule endoscope |
JP2009136387A (ja) | 2007-12-04 | 2009-06-25 | Fujinon Corp | 撮像レンズ及びカプセル内視鏡 |
EP2402808A4 (en) | 2009-12-07 | 2013-10-30 | Olympus Medical Systems Corp | ENDOSCOPIC OBJECTIVE AND DEVICE |
EP2477053B1 (en) * | 2009-12-11 | 2019-06-19 | Olympus Corporation | Endoscope objective optical system |
WO2011148822A1 (ja) | 2010-05-28 | 2011-12-01 | オリンパスメディカルシステムズ株式会社 | 結像光学系および撮像装置 |
CN102918441B (zh) | 2010-06-01 | 2016-05-25 | Hoya株式会社 | 内窥镜用物镜及内窥镜 |
WO2014208373A1 (ja) | 2013-06-26 | 2014-12-31 | オリンパスメディカルシステムズ株式会社 | 内視鏡対物光学系 |
JP5855793B2 (ja) * | 2013-08-22 | 2016-02-09 | オリンパス株式会社 | 内視鏡用対物光学系 |
JP6195808B2 (ja) * | 2014-07-02 | 2017-09-13 | 富士フイルム株式会社 | 内視鏡用対物レンズおよび内視鏡 |
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JP2000330015A (ja) * | 1999-03-12 | 2000-11-30 | Fuji Photo Optical Co Ltd | 観察深度可変型の内視鏡用対物レンズ |
WO2014175038A1 (ja) * | 2013-04-22 | 2014-10-30 | オリンパスメディカルシステムズ株式会社 | 広角対物光学系 |
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JPWO2018061385A1 (ja) | 2018-09-27 |
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DE112017004856T5 (de) | 2019-06-13 |
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