Patent ID: 6635010
Filing Date: 2003-10-21
Classification: G02B

Abstract:
Endoscope objective having a viewing angle including an angle of < >0Â° relative to a longitudinal axis of the endoscope, comprising:a lens for imaging an object field into a single image plane disposed orthogonally on the longitudinal axis, a prism having a surface; said surface including a coating that comprises a thin layer having a refractive index smaller than a refractive index of said prism so that total reflection occurs against the layer; said surface of said prism is in direct contact with the lens, disposed downstream of a portion of the lens along an imaging path, in which a beam is reflected on two surface areas such that the beam will be deflected in the prism from the viewing angle into the longitudinal axis of the endoscope, and characterized in that said coating is applied on an entire said surface of said prism facing a distal end of the endoscope.