1977-02-24
1978-11-21
Sacher, Paul A.
350175ML, G02B 1514
Patent
active
041263774
ABSTRACT:
An optical compensation type zoom optical system for microscopes comprising a first through fourth lens groups, and is so adapted as to displace said first and third lens groups for zooming while said second and fourth lens groups are kept fixed, said optical system being so designed as to assure little deviation of image planes during zooming operation and favorably correct various aberrations.
REFERENCES:
patent: 3063341 (1962-11-01), Beck
patent: 3502392 (1970-03-01), Muller
patent: 3679286 (1972-07-01), Klein
Olympus Optical Co,. Ltd.
Sacher Paul A.
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