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JPS5619020A - Endscope optical system - Google Patents

Endscope optical system

Info

Publication number
JPS5619020A
JPS5619020AJP9541779AJP9541779AJPS5619020AJP S5619020 AJPS5619020 AJP S5619020AJP 9541779 AJP9541779 AJP 9541779AJP 9541779 AJP9541779 AJP 9541779AJP S5619020 AJPS5619020 AJP S5619020A
Authority
JP
Japan
Prior art keywords
lens
endscope
lens system
constituting
optical system
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
JP9541779A
Other languages
Japanese (ja)
Inventor
Yasumasa Sunaga
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
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 Fuji Photo Optical Co LtdfiledCriticalFuji Photo Optical Co Ltd
Priority to JP9541779ApriorityCriticalpatent/JPS5619020A/en
Publication of JPS5619020ApublicationCriticalpatent/JPS5619020A/en
Pendinglegal-statusCriticalCurrent

Links

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Abstract

PURPOSE: To obtain an endscope optical system which is compact and is ≥100° in angle of view by preparing a front group divergent lens system, a visual field changing prism and a rear group convergent lens system and so constituting these as to satisfy predetermined conditions.
CONSTITUTION: Luminous flux incident from a concave lens 1 constituting the front group divergent lens system is changed of direction 90° by a pentagonal roof prism 2 and enters an optical fiber bundle 5 by way of a stop 3 and the plano convex lens, the cemented lens of a concave meniscus lens and a convex lens and a convex lens constituting the rear group convergent lens system 4. Now, fr is defined as the focal length of a rear group convergent lens system 4 and N2 as the refractive index of the visual field changing prism and the condition of 1.23≤N2/fr≤1.6 is satisfied. Thereby, the endscope optical system which is extremely compact and of a wide angle of view of ≥100° is obtained.
COPYRIGHT: (C)1981,JPO&Japio
JP9541779A1979-07-261979-07-26Endscope optical systemPendingJPS5619020A (en)

Priority Applications (1)

Application NumberPriority DateFiling DateTitle
JP9541779AJPS5619020A (en)1979-07-261979-07-26Endscope optical system

Applications Claiming Priority (1)

Application NumberPriority DateFiling DateTitle
JP9541779AJPS5619020A (en)1979-07-261979-07-26Endscope optical system

Publications (1)

Publication NumberPublication Date
JPS5619020Atrue JPS5619020A (en)1981-02-23

Family

ID=14137102

Family Applications (1)

Application NumberTitlePriority DateFiling Date
JP9541779APendingJPS5619020A (en)1979-07-261979-07-26Endscope optical system

Country Status (1)

CountryLink
JP (1)JPS5619020A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication numberPriority datePublication dateAssigneeTitle
JPS57210303A (en)*1981-06-201982-12-23Sumitomo Electric Ind LtdPicture transmission line
JPS5937405A (en)*1982-08-261984-02-29Mitsutoyo Mfg Co LtdPhotoelectric type measuring device
US4764334A (en)*1983-10-171988-08-16Westinghouse Electric Corp.Visual inspection system for radioactive fuel assemblies using fiberoptics
JPS63293515A (en)*1987-05-261988-11-30Asahi Optical Co LtdObjective lens for endoscope
WO2014132317A1 (en)*2013-02-282014-09-04富士フイルム株式会社Imaging lens and imaging device

Citations (3)

* Cited by examiner, † Cited by third party
Publication numberPriority datePublication dateAssigneeTitle
JPS5144937A (en)*1974-10-151976-04-16Olympus Optical Co
JPS5149734A (en)*1974-10-261976-04-30Olympus Optical Co
JPS5162053A (en)*1974-11-271976-05-29Olympus Optical Co

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication numberPriority datePublication dateAssigneeTitle
JPS5144937A (en)*1974-10-151976-04-16Olympus Optical Co
JPS5149734A (en)*1974-10-261976-04-30Olympus Optical Co
JPS5162053A (en)*1974-11-271976-05-29Olympus Optical Co

Cited By (9)

* Cited by examiner, † Cited by third party
Publication numberPriority datePublication dateAssigneeTitle
JPS57210303A (en)*1981-06-201982-12-23Sumitomo Electric Ind LtdPicture transmission line
JPS5937405A (en)*1982-08-261984-02-29Mitsutoyo Mfg Co LtdPhotoelectric type measuring device
US4764334A (en)*1983-10-171988-08-16Westinghouse Electric Corp.Visual inspection system for radioactive fuel assemblies using fiberoptics
JPS63293515A (en)*1987-05-261988-11-30Asahi Optical Co LtdObjective lens for endoscope
WO2014132317A1 (en)*2013-02-282014-09-04富士フイルム株式会社Imaging lens and imaging device
CN105074529A (en)*2013-02-282015-11-18富士胶片株式会社Imaging lens and imaging device
JP5826431B2 (en)*2013-02-282015-12-02富士フイルム株式会社 Imaging lens and imaging apparatus
CN105074529B (en)*2013-02-282017-05-10富士胶片株式会社Imaging lens and imaging device
US9753248B2 (en)2013-02-282017-09-05Fujifilm CorporationImaging lens and imaging apparatus

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