Endoscope optical system with a window plate having a light scre

Details Endoscope optical system with a window plate having a light scre Endoscope optical system with a window plate having a light scre

1996-06-19

1998-02-17

Apley, Richard J.

Surgery

Endoscope

Having imaging and illumination means

600160, A61B 106

Patent

active

057186634

ABSTRACT:
An endoscope optical system has a shaft containing parallel image and light guides, the distal ends of which are covered by a window which closes the distal end of the shaft and which has a light screen near the separating line between the cross-sectional regions of the image guide and the light guide. The window is a one-piece window plate with at least one circular slot forming a light screen. The slot extends parallel to the separating line and is formed in one of the inner or outer surfaces of the window plate. Multiple slots forming a labyrinth are also disclosed.

REFERENCES:
patent: 4111561 (1978-09-01), Plummer
patent: 4421386 (1983-12-01), Podgorski
patent: 4500181 (1985-02-01), Takahashi
patent: 4772094 (1988-09-01), Sheiman
patent: 4942867 (1990-07-01), Takahashi et al.
patent: 5193525 (1993-03-01), Silverstein et al.
patent: 5448990 (1995-09-01), De Faria-Correa

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