Optical system for endoscope

Details Optical system for endoscope Optical system for endoscope

1987-09-11

1988-05-24

Corbin, John K.

Surgery

Truss

Pad

128 4, 128 5, 350 11, 350286, A61B 104, G02B 504, G02B 522, G02B 530

Patent

active

047462035

ABSTRACT:
An optical system is disclosed for an endoscope having a generally tubular distal end in which an objective lens assembly and an image sensor in the form of a solid-state video camera are internally housed so that an image formed by the lens assembly is focussed upon the input or pickup surface of the video camera. The video camera is disposed along or in proximity to the center axis of the distal end of the endoscope and in some instances is oblique with respect to the center axis. The video camera may be positioned in this way due to the provision of a reflecting surface which is angularly disposed in opposing relationship with an input surface of the video camera, and deflection means disposed in front of the lens assembly and within the objective lens assembly, or between the lens assembly and the reflecting surface so that an image formed by the lens assembly can be focussed on the input surface of the video camera.

REFERENCES:
patent: 1698124 (1929-01-01), De Zeng
patent: 3095475 (1963-06-01), Brake
patent: 3901220 (1975-08-01), Koyasu et al.
patent: 4113354 (1978-09-01), Yamasita
patent: 4310228 (1982-01-01), Terada
patent: 4626897 (1986-12-01), Sato et al.
patent: 4692608 (1987-09-01), Cooper et al.

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