JPH02285320A - Stop device for endoscope - Google Patents

Stop device for endoscope

Info

Publication number
JPH02285320A
JPH02285320A JP10804589A JP10804589A JPH02285320A JP H02285320 A JPH02285320 A JP H02285320A JP 10804589 A JP10804589 A JP 10804589A JP 10804589 A JP10804589 A JP 10804589A JP H02285320 A JPH02285320 A JP H02285320A
Authority
JP
Grant status
Application
Patent type
Prior art keywords
polarizing
plate
stop
hole
light
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
JP10804589A
Inventor
Shoichi Gotanda
Masahiro Kawashima
Koji Koda
Ryoichi Kono
Kenichiro Maki
Takeaki Nakamura
Akira Suzuki
Toshiyuki Takara
Yasuhiro Ueda
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

Links

Classifications

    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B1/00Instruments 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
    • A61B1/06Instruments 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
    • A61B1/0646Instruments 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 with illumination filters

Abstract

PURPOSE: To adjust the brightness and field depth range of an observation optical system while an endoscope insert part is inserted into the somatic cavity by providing a 1st polarizing plate which is arranged at the periphery of a through hole on the optical path of an objective lens system and a 2nd polarizing plate which is arranged rotatably and relatively to the 1st polarizing plate, and changing the state of a stop.
CONSTITUTION: This device is provided with the through hole 31 which is interposed in the optical path of the objective lens system atop the insert part and passes a specific quantity of light, the 1st polarizing plate 33 which is arranged at the periphery of the through hole 31, and the 2nd polarizing plate 45 which is arranged rotatably and relatively to the 1st polarizing plate 33. When the 2nd polarizing plate 45 is rotated, the polarizing direction of the 2nd polarizing plate 45 can be changed as to the polarizing direction of the 1st polarizing plate 33 to adjust the quantity of passing light. Further, when the polarizing directions of the 1st and 2nd polarizing plates 33 and 45 are 90° different from each other, only the light from the through hole of a stop main body 30 can be passed and the stop diameter can be varied. Consequently, the quantity of the passing light and stop diameter can be adjusted and the brightness and field depth of an observation image is adjustable.
COPYRIGHT: (C)1990,JPO&Japio
JP10804589A 1989-04-27 1989-04-27 Stop device for endoscope Pending JPH02285320A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP10804589A JPH02285320A (en) 1989-04-27 1989-04-27 Stop device for endoscope

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10804589A JPH02285320A (en) 1989-04-27 1989-04-27 Stop device for endoscope

Publications (1)

Publication Number Publication Date
JPH02285320A true true JPH02285320A (en) 1990-11-22

Family

ID=14474539

Family Applications (1)

Application Number Title Priority Date Filing Date
JP10804589A Pending JPH02285320A (en) 1989-04-27 1989-04-27 Stop device for endoscope

Country Status (1)

Country Link
JP (1) JPH02285320A (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2013198694A (en) * 2012-03-26 2013-10-03 Hoya Corp Light amount adjustment mechanism of endoscope
US9341954B2 (en) 2007-10-24 2016-05-17 Nikon Corporation Optical unit, illumination optical apparatus, exposure apparatus, and device manufacturing method
US9423698B2 (en) 2003-10-28 2016-08-23 Nikon Corporation Illumination optical apparatus and projection exposure apparatus
US9678437B2 (en) 2003-04-09 2017-06-13 Nikon Corporation Illumination optical apparatus having distribution changing member to change light amount and polarization member to set polarization in circumference direction
US9678332B2 (en) 2007-11-06 2017-06-13 Nikon Corporation Illumination apparatus, illumination method, exposure apparatus, and device manufacturing method
US9885872B2 (en) 2003-11-20 2018-02-06 Nikon Corporation Illumination optical apparatus, exposure apparatus, and exposure method with optical integrator and polarization member that changes polarization state of light
US9891539B2 (en) 2005-05-12 2018-02-13 Nikon Corporation Projection optical system, exposure apparatus, and exposure method

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9885959B2 (en) 2003-04-09 2018-02-06 Nikon Corporation Illumination optical apparatus having deflecting member, lens, polarization member to set polarization in circumference direction, and optical integrator
US9678437B2 (en) 2003-04-09 2017-06-13 Nikon Corporation Illumination optical apparatus having distribution changing member to change light amount and polarization member to set polarization in circumference direction
US9760014B2 (en) 2003-10-28 2017-09-12 Nikon Corporation Illumination optical apparatus and projection exposure apparatus
US9423698B2 (en) 2003-10-28 2016-08-23 Nikon Corporation Illumination optical apparatus and projection exposure apparatus
US9885872B2 (en) 2003-11-20 2018-02-06 Nikon Corporation Illumination optical apparatus, exposure apparatus, and exposure method with optical integrator and polarization member that changes polarization state of light
US9891539B2 (en) 2005-05-12 2018-02-13 Nikon Corporation Projection optical system, exposure apparatus, and exposure method
US9857599B2 (en) 2007-10-24 2018-01-02 Nikon Corporation Optical unit, illumination optical apparatus, exposure apparatus, and device manufacturing method
US9341954B2 (en) 2007-10-24 2016-05-17 Nikon Corporation Optical unit, illumination optical apparatus, exposure apparatus, and device manufacturing method
US9678332B2 (en) 2007-11-06 2017-06-13 Nikon Corporation Illumination apparatus, illumination method, exposure apparatus, and device manufacturing method
JP2013198694A (en) * 2012-03-26 2013-10-03 Hoya Corp Light amount adjustment mechanism of endoscope

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