Optical system for variable direction of view instrument

G - Physics – 02 – B

Patent

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G02B 23/24 (2006.01) A61B 1/00 (2006.01)

Patent

CA 2534601

A optical system for a viewing instrument with a variable direction of view is disclosed generally comprising shaft, first and second reflectors located at the distal end of the shaft, where the first reflector rotates about an axis angularly offset from the longitudinal axis of the shaft, and an entrance pupil positioned in the optical path created by the reflectors and preceding the reflecting surface of the second reflector. In certain embodiments, the entrance pupil comprises an aperture stop positioned between the first and second reflectors. In some embodiments, the system includes negative and positive lenses located adjacent the entrance and exit faces of the first reflector.

Système optique pour instrument de visualisation à direction de visée variable comprenant généralement une tige, un premier et un second réflecteurs à l'extrémité distale de la tige, où le premier réflecteur tourne autour d'un axe qui présente un décalage angulaire par rapport à l'axe longitudinal de la tige, ainsi qu'une pupille d'entrée placée dans le chemin optique créé par les réflecteurs qui précède la surface réfléchissante du second réflecteur. Dans certains modes de réalisation, la pupille d'entrée comprend un diaphragme placé entre le premier et le second réflecteurs. Dans certains modes de réalisation, le système comprend également des lentilles convergentes et divergentes adjacentes aux faces d'entrée et de sortie du premier réflecteur.

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