Miniaturized video observation system, has lens between zoom system and video sensor, adjusted so that maximum free diameter fulfills given inequalities

摘要

A video adaptor (9) with at least one lens (39,41) is arranged between a zoom system (7) and a video sensor (15). The lens is adjusted so that when the working separation (a) is at a maximum, the inequalities Dfmax.Dbf)/f is greater than or equal to 1.0 mm and Dfmax is less than 10 mm are satisfied, where Dfmax is a maximum free diameter of all lenses in the video observation system, Dbf is a diameter of the radiation-sensitive surface in the image plane (13), and f is the focal length of the video adaptor.