JPS6433516A - Objective optical system for endoscope - Google Patents

Objective optical system for endoscope

Info

Publication number
JPS6433516A
JPS6433516A JP62189750A JP18975087A JPS6433516A JP S6433516 A JPS6433516 A JP S6433516A JP 62189750 A JP62189750 A JP 62189750A JP 18975087 A JP18975087 A JP 18975087A JP S6433516 A JPS6433516 A JP S6433516A
Authority
JP
Japan
Prior art keywords
light
group
rear group
yag laser
oscillation wavelength
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
JP62189750A
Other languages
Japanese (ja)
Inventor
Susumu Takahashi
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.)
Olympus Corp
Original Assignee
Olympus 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 Olympus Optical Co Ltd filed Critical Olympus Optical Co Ltd
Priority to JP62189750A priority Critical patent/JPS6433516A/en
Priority to US07/187,040 priority patent/US4916534A/en
Publication of JPS6433516A publication Critical patent/JPS6433516A/en
Priority to US07/870,754 priority patent/US5177605A/en
Pending legal-status Critical Current

Links

Landscapes

  • Instruments For Viewing The Inside Of Hollow Bodies (AREA)
  • Endoscopes (AREA)

Abstract

PURPOSE:To shorten the overall length of an objective optical system by using a material which absorbs light of the oscillation wavelength of a YAG laser to form at least one of optical elements in a front group and rear group and forming interference films on the joint faces of the optical element and/or the exist face of the rear group. CONSTITUTION:At least one piece of the optical elements in the front group and the rear group is formed of the material which absorbs the light of the oscillation wavelength of the YAG laser and the interference films 16, 17 which reflect the light of the oscillation wavelength of the YAG laser are formed on the joint faces in the front group and the rear group and/or the exit face of the rear group and, therefore, IR light can be sufficiently removed without having a filter space. The overall length is consequently short and the size is small. Since an IR absorption type cut filter 15 for adjusting visual sensitivity is disposed in the position behind a planoconvex lens 14 which is the rear side lens, i.e., the position where the main rays are parallel, the colors within the visual field are uniformized.
JP62189750A 1987-04-28 1987-07-29 Objective optical system for endoscope Pending JPS6433516A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
JP62189750A JPS6433516A (en) 1987-07-29 1987-07-29 Objective optical system for endoscope
US07/187,040 US4916534A (en) 1987-04-28 1988-04-27 Endoscope
US07/870,754 US5177605A (en) 1987-04-28 1992-04-20 Optical system for endoscopes and endoscopes using same

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP62189750A JPS6433516A (en) 1987-07-29 1987-07-29 Objective optical system for endoscope

Publications (1)

Publication Number Publication Date
JPS6433516A true JPS6433516A (en) 1989-02-03

Family

ID=16246554

Family Applications (1)

Application Number Title Priority Date Filing Date
JP62189750A Pending JPS6433516A (en) 1987-04-28 1987-07-29 Objective optical system for endoscope

Country Status (1)

Country Link
JP (1) JPS6433516A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0663009U (en) * 1993-02-17 1994-09-06 オリンパス光学工業株式会社 Endoscope optical system
JP2006078672A (en) * 2004-09-08 2006-03-23 Olympus Corp Optical system with a plurality of optical elements and imaging apparatus equipped with same
KR100843453B1 (en) * 2006-12-29 2008-07-03 삼성전기주식회사 Optical movement sensing system

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0663009U (en) * 1993-02-17 1994-09-06 オリンパス光学工業株式会社 Endoscope optical system
JP2006078672A (en) * 2004-09-08 2006-03-23 Olympus Corp Optical system with a plurality of optical elements and imaging apparatus equipped with same
KR100843453B1 (en) * 2006-12-29 2008-07-03 삼성전기주식회사 Optical movement sensing system

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