Image search device for endoscopic apparatus, has Pechan prism arranged between objective and image reforming optical system, moved perpendicular with respect to optical axis of objective system

摘要

A Pechan, Abbe or Porro prism (24) is arranged between objective optical system (11,12) and an image reforming optical system (26) to guide light between the optical systems. A drive mechanism moves the prism perpendicular with respect to the optical axis (Ax) of objective system.