Imaging optical system

Details Imaging optical system Imaging optical system

1988-11-10

1989-10-17

Arnold, Bruce Y.

350449, G02B 1514, G02B 960

Patent

active

048742325

ABSTRACT:
An imaging optical system to be used in combination with fiberscopes, etc. comprising a first lens unit having positive refractive power and the function of a compensator, a second lens unit having negative refractive power and the function of a variator, a third lens unit having positive refractive power and the function of an imaging lens, and a stop arranged before the first lens unit, said imaging optical system being so adapted as to provide bright images at an optimum magnification and permit photographing images within the same magnification range on image pick-up devices having any image sizes.

REFERENCES:
patent: 3477776 (1969-11-01), Price
patent: 3937562 (1976-02-01), Muszumanski et al.
patent: 4063800 (1977-12-01), Iizuka et al.

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