Optical systems for endoscopes

Details Optical systems for endoscopes Optical systems for endoscopes

1986-06-06

1987-05-19

Punter, William H.

350570, G02B 1515, G02B 1522

Patent

active

046662626

ABSTRACT:
This invention relates to an endoscope optical system for macroscopic overall view observation and for microscopic detail observation after contacting an object by an objective viewing aperture, the system comprising an objective lens group, an occular lens group and a relay lens group wherein a displaceable lens or lens group is disposed between the occular and relay lens groups, the displacable lens or lens group being moveable through a first overall view range between limits towards and away from the relay lens group defining a first macroscopic magnification and a second detail view range between limits towards and away from the relay lens group defining a second microscopic magnification, the first range of movement being closer to the occular lens group than the second range and the ranges being spaced apart between the occular and the relay lens groups.

REFERENCES:
patent: 3608998 (1971-09-01), Rinker
patent: 4076018 (1978-02-01), Heckele
patent: 4300812 (1981-11-01), Nakahashi
patent: 4312572 (1982-01-01), Yamashita et al.
Minolta, Minolta Tech. Bull. #8, "Zoom Photography with Minolta Rokker Lenses", Minolta Corp., 200 Park Ave. S., N.Y., N.Y. 10003.
"Objektive mit veranderlicher Brennweite", Camera, Internationale Monatschrift fur Photographie und Film, Bucher-Verlag, Luzern/Zurich, 1961 (Heft 1).

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