Movatterモバイル変換

[0]ホーム
URL:

JPS57173810A - Optical system of endoscope objective lens - Google Patents

Optical system of endoscope objective lens

Info

Publication number
JPS57173810A
JPS57173810AJP56059964AJP5996481AJPS57173810AJP S57173810 AJPS57173810 AJP S57173810AJP 56059964 AJP56059964 AJP 56059964AJP 5996481 AJP5996481 AJP 5996481AJP S57173810 AJPS57173810 AJP S57173810A
Authority
JP
Japan
Prior art keywords
group
lens
endoscope objective
objective lens
aspherical surface
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
Application number
JP56059964A
Other languages
Japanese (ja)
Inventor
Ryoichi Doi
Yasumasa Sunaga
Takashi Miyano
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Fujinon Corp
Original Assignee
Fujinon Corp
Fuji Photo Optical Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Fujinon Corp, Fuji Photo Optical Co LtdfiledCriticalFujinon Corp
Priority to JP56059964ApriorityCriticalpatent/JPS57173810A/en
Priority to DE19823214544prioritypatent/DE3214544A1/en
Publication of JPS57173810ApublicationCriticalpatent/JPS57173810A/en
Pendinglegal-statusCriticalCurrent

Links

Classifications

Landscapes

Abstract

PURPOSE: To convert a lens to a wide angle and to reduce its diameter, by forming at least its one surface to an aspherical surface, and satisfying prescribed conditions, in a retrofocus type endoscope objective lens system consisting of a front concave lens group and a rear convex lens group.
CONSTITUTION: In a retrofocus type endoscope objective lens consisting of a front group concave lens G1, a brightness diaphragm S, and convex lenses G2, G3 being a rear group L2, in order from an object side, R4 of the rear group G2 is converted to an aspherical surface, and an optical fiber is placed on an image formation surface P'. In this optical system, conditions of 0.8<1f1/f≤2.5 and 1<f2≤1.5 are satisfied. Provided that (f), f1 and f2 denote a focal distance of the whole system, the front group L1 and the rear group L2, respectively. Since the aspherical surface has been introduced, it is possible to convert a lens to a wide angle and to reduce its outside diameter.
COPYRIGHT: (C)1982,JPO&Japio
JP56059964A1981-04-211981-04-21Optical system of endoscope objective lensPendingJPS57173810A (en)

Priority Applications (2)

Application NumberPriority DateFiling DateTitle
JP56059964AJPS57173810A (en)1981-04-211981-04-21Optical system of endoscope objective lens
DE19823214544DE3214544A1 (en)1981-04-211982-04-20Optical system for an endoscope

Applications Claiming Priority (1)

Application NumberPriority DateFiling DateTitle
JP56059964AJPS57173810A (en)1981-04-211981-04-21Optical system of endoscope objective lens

Publications (1)

Publication NumberPublication Date
JPS57173810Atrue JPS57173810A (en)1982-10-26

Family

ID=13128353

Family Applications (1)

Application NumberTitlePriority DateFiling Date
JP56059964APendingJPS57173810A (en)1981-04-211981-04-21Optical system of endoscope objective lens

Country Status (2)

CountryLink
JP (1)JPS57173810A (en)
DE (1)DE3214544A1 (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication numberPriority datePublication dateAssigneeTitle
DE3600573A1 (en)*1985-01-111986-07-17Olympus Optical Co., Ltd., Tokio/Tokyo ENDOSCOPE LENS
US4662725A (en)*1984-02-151987-05-05Olympous Optical Co., Ltd.Objective lens system for endoscopes
US5208702A (en)*1990-04-111993-05-04Olympus Optical Co., Ltd.Objective lens system for endoscopes
US5418649A (en)*1992-04-281995-05-23Olympus Optical Co., Ltd.Objective lens system for endoscopes
WO2003083548A1 (en)*2002-03-292003-10-09Won-Seok ChoiSuper wide angle lens structure

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication numberPriority datePublication dateAssigneeTitle
JPS6026918A (en)*1983-07-231985-02-09Fuji Photo Optical Co LtdObjective optical system for endoscope
JPH0648327B2 (en)*1984-07-281994-06-22オリンパス光学工業株式会社 Endoscope objective lens
US6850279B1 (en)1996-06-182005-02-01Sony CorporationOptical image recording system, and associated processing system
DE69715198T3 (en)*1996-06-182009-07-09Corp. Sony OPTICAL IMAGE RECORDING SYSTEM AND RELATED DEVELOPMENT DEVICE
JP4274602B2 (en)*1998-09-112009-06-10オリンパス株式会社 Objective optical system

Cited By (7)

* Cited by examiner, † Cited by third party
Publication numberPriority datePublication dateAssigneeTitle
US4662725A (en)*1984-02-151987-05-05Olympous Optical Co., Ltd.Objective lens system for endoscopes
USRE33689E (en)*1984-02-151991-09-10Olympus Optical Co., Ltd.Objective lens system for endoscopes
DE3600573A1 (en)*1985-01-111986-07-17Olympus Optical Co., Ltd., Tokio/Tokyo ENDOSCOPE LENS
US4867546A (en)*1985-01-111989-09-19Olympus Optical Co., Ltd.Objective lens system for an endoscope
US5208702A (en)*1990-04-111993-05-04Olympus Optical Co., Ltd.Objective lens system for endoscopes
US5418649A (en)*1992-04-281995-05-23Olympus Optical Co., Ltd.Objective lens system for endoscopes
WO2003083548A1 (en)*2002-03-292003-10-09Won-Seok ChoiSuper wide angle lens structure

Also Published As

Publication numberPublication date
DE3214544A1 (en)1982-11-11

Similar Documents

PublicationPublication DateTitle
JPS5625709A (en)Objective optical system for endoscope
JPS5764207A (en)Endoscope objective lens
JPS6419317A (en)Telecentric image formation optical system with large picture plane size
JPS55163510A (en)Telephoto lens
JPS5229238A (en)Inside-view mirror objective optical system
JPS5744115A (en)Reflex telephoto zoom lens system
JPS5746224A (en)Lens system equipped with auxiliary lens
JPS55101908A (en)Wide angle door scope
JPS54119233A (en)Finder optical system
JPS57173810A (en)Optical system of endoscope objective lens
JPS57190917A (en)Superwide-angle zoom lens
JPS5595920A (en)Rear attachment lens
JPS5643618A (en)Attachment lens
JPS57135911A (en)Small-size photographic lens
JPS5397824A (en)Camera lens of behind iris
JPS5767908A (en)Wide-angle zoom lens
JPS54622A (en)Copying lens
JPS56107209A (en)Photographic lens of large aperture ratio corrected for short distance
JPS55111914A (en)Rear iris photographing lens
JPS5643619A (en)Wide angle zoom lens
JPS5470826A (en)Wide-angle objective lens
JPS5797507A (en)Imaging optical system
JPS57168214A (en)Albada finder
JPS5323645A (en)Zoom lens capable of easy transfer for focal distance range
JPS5782811A (en)Zoom lens
[8]ページ先頭
©2009-2025 Movatter.jp