Light shielding construction for the forward end of an endoscope

Details Light shielding construction for the forward end of an endoscope Light shielding construction for the forward end of an endoscope

1985-08-23

1987-03-03

Grieb, William H.

Surgery

Truss

Perineal

A61B 106

Patent

active

046467211

ABSTRACT:
An endoscope includes in the viewing head of its insertable section into a cavity of a living body an image sensor for generating a video signal which in turn is transmitted to a television display to be visualized thereon as a television picture. The image sensor with a shape such as a plate is located in a plane containing the longitudinal center line of the viewing head.
According to the present invention, a mask having an opening formed at a position opposed to an image area of the image sensor is provided, so that any light other than the light contributing to the image formation can be prevented from falling into the image sensor.

REFERENCES:
patent: 2788390 (1957-04-01), Sheldon
patent: 3924608 (1975-12-01), Mitsui
patent: 4266534 (1981-05-01), Ogawa
patent: 4491865 (1985-01-01), Danna et al.
patent: 4573450 (1986-03-01), Arakawa

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