1979-05-08
1981-11-17
Corbin, John K.
G02B 704
Patent
active
043008127
ABSTRACT:
An optical system for endoscopes comprising an objective lens, a plural number of relay lenses for consecutively transferring the image formed with said objective lens and an eyepiece. In said optical system, the whole or portion of one of said relay lenses can be displaced along the optical axis to vary magnification level of said optical system.
REFERENCES:
patent: 3608998 (1971-09-01), Rinker
Corbin John K.
Koren Matthew W.
Olympus Optical Co,. Ltd.
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