Optical path conversion optical system in convex mirror for endoscope, has prisms with reflecting surfaces contained in long housing for sequentially bending and reflecting optical axis of observed light

摘要

At least two prisms (1,2) have reflecting surfaces (1a,1b,2b,2c) contained in a long and slender housing which sequentially bent the optical axis (O) of an observed light to upper portion of the housing and reflects light consecutively.