发明授权
US5050974A Optical system for endoscopes 失效
内镜光学系统

Optical system for endoscopes
摘要:
An optical system for endoscopes so adapted as to be usable with video endoscopes, comprising an imaging lens system equipped with an aperture stop and a field lens component arranged on the image side thereof, and so designed as to prevent the color shading from being produced by selecting an adequate focal length for the field lens component.
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