OPTICAL SYSTEM OF A STEREO VIDEO ENDOSCOPE WITH LATERAL VIEWING DIRECTION AND STEREO VIDEO ENDOSCOPE WITH LATERAL VIEWING DIRECTION

摘要

The invention relates to an optical system (50) of a stereo video endoscope (1) with lateral viewing direction, comprising a sideways looking distal optical assembly (60) and a proximal optical assembly (70), wherein the distal optical assembly (60) comprises successively in a direction of light incidence an entrance lens (61), an optical deflection unit (62) and an exit lens (63), embodied as a hollow positive meniscus, on a common optical axis, wherein the proximal optical assembly (70) has at least in sections two right and left lens system channels (71, 72) of identical type and arranged parallel to one another, having in each case a dedicated optical axis, which have in each case in the direction of light incidence at least one first lens (71a, 72a) and an achromatic lens group (71b, 72b), and the invention relates to a corresponding stereo video endoscope (1) with lateral viewing direction. In the optical system (50) according to the invention, the entrance lens (61) is embodied as a raised negative meniscus.