Endoscope system

Details Endoscope system Endoscope system

1998-05-18

1999-09-28

Leubecker, John P.

Surgery

Endoscope

Having imaging and illumination means

600181, A61B 104

Patent

active

059578343

ABSTRACT:
An endoscope system includes an imaging unit for converting an image of an object into an image signal, and an automatic amount-of-light setting circuit for setting an amount of light output from a light source apparatus on the basis of the image signal provided by the imaging unit. According to a setting signal sent from the automatic amount-of-light setting circuit, the amount of light output from the light source apparatus is adjusted. Aside from the automatic amount-of-light setting circuit, a device used to set an amount of light manually is included. The automatic amount-of-light setting circuit and manual amount-of-light setting device can be switched selectively by means of a switch. Consequently, a drawback of the automatic amount-of-light setting circuit occurring when the endoscope is removed from a human body, that is, the drawback that when control is given for lowering the level of the image signal, the amount of light is increased will not take place. Control can be given for decreasing the amount of source light.

REFERENCES:
patent: 4791479 (1988-12-01), Ogiu
patent: 4868645 (1989-09-01), Kobayashi
patent: 4884133 (1989-11-01), Kanno
patent: 4928172 (1990-05-01), Uehara
patent: 4967269 (1990-10-01), Sasagawa
patent: 5408263 (1995-04-01), Kikuchi

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