초록 ▼

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 gui

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.

대표청구항 ▼

[ What is claimed is:] [1.] An endoscope optical system comprisinga generally tubular shaft (1) having a distal end;an image guide (3) in said shaft having a distal end;a light guide (5) parallel with said image guide in said shaft and having a distal end, said image and light guides being separated

[ What is claimed is:] [1.] An endoscope optical system comprisinga generally tubular shaft (1) having a distal end;an image guide (3) in said shaft having a distal end;a light guide (5) parallel with said image guide in said shaft and having a distal end, said image and light guides being separated from each other along a separating line; anda one-piece window mounted on said shaft at said distal ends of said image and light guides and closing said distal end of said shaft, said window havingsubstantially parallel inner and outer surfaces, andmeans defining at least one air-filled slot extending into said window from at least one of said inner and outer surfaces, said at least one slot being aligned with said separating line and forming a light screen to diminish transmission of stray light from said light guide to said image guide.