Afocal zoom lens system

Details Afocal zoom lens system Afocal zoom lens system

1985-02-28

1987-05-19

Corbin, John K.

G02B 964, G02B 1516

Patent

active

046662588

ABSTRACT:
An afocal zoom lens system comprising a first lens group having positive refractive power, a second lens group having negative refractive power, a third lens group having positive refractive power, and a fourth lens group having negative refractive power, the zoom lens system as a whole being arranged as an afocal lens system, the afocal zoom lens system being arranged to be zoomed by respectively varying the airspaces between respective lens groups.

REFERENCES:
patent: 3679286 (1972-07-01), Klein

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