ENDOSKOP MIT VARIABLER BLICKRICHTUNG

摘要

An endoscope includes an optical train or image-to-video conversion device, defining a longitudinal axis, for receiving an image for transmission to a viewing device. A first prism having a reflective surface at 45° to the longitudinal axis and laterally offset from is mounted for rotation about an axis that is perpendicular to and intersecting the longitudinal axis and the axis intersecting the center of the reflective surface. A second prism with a reflective surface at 45° to and intersecting the longitudinal axis is also provided. The field of view is illuminated by light transmitted to a third prism with a reflective surface mounted symmetrically about the longitudinal axis with respect to the first reflector and rotatable synchronously with the first reflector. In this way, the direction of view and of illumination can an be varied synchronously over a range of about 120°.