Endoscope using solid state image pick-up device

Details Endoscope using solid state image pick-up device Endoscope using solid state image pick-up device

1985-08-16

1986-12-23

Britton, Howard W.

Facsimile and static presentation processing

Static presentation processing

Attribute control

128 6, 358 42, 358168, 358174, 358176, A61B 104, A61B 106

Patent

active

046315829

ABSTRACT:
An endoscope is disclosed having a solid state image pick-up for receiving an image from a subject to be examined. The endoscope includes an illuminating source for projecting light onto the subject, a first level detector for detecting a level of a video signal supplied from the solid state image pick-up device, a first level comparator connected to the first level detector for comparing the level of the signal detected by the first level detector with a preset first reference level and generating a first control signal in accordance with the level difference, and a light controller connected to the output of the first level comparator for controlling the amount of light emitted from the illuminating source based on the first control signal. The endoscope also includes a gain-variable amplifier for receiving and amplifying the video signal from the solid state image pick-up device, a second level detector connected to the gain-variable amplifier for detecting the level of the signal therefrom, and a circuit connected to the second level detector for comparing the level of the signal detected by the second level detector with a preset second reference level and generating a second control signal in accordance with the level difference therebetween and providing the second control signal as a gain controlling signal to the gain-variable amplifier.

REFERENCES:
patent: 4532918 (1985-08-01), Wheeler
patent: 4535758 (1985-08-01), Longacre
patent: 4546379 (1985-10-01), Sarofeen
patent: 4562831 (1986-01-01), Murakoshi

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