Zoom lenses

Details Zoom lenses Zoom lenses

1978-06-07

1980-01-29

Sacher, Paul A.

G02B 1514

Patent

active

041858930

ABSTRACT:
Compact, high performance low zoom ratio variable viewing angle lens systems are provided by constructing the lens systems of two lens groups separated by a variable aerial space and limiting the dimensions of the lens systems by various mathematical conditions.

REFERENCES:
patent: 4074931 (1978-02-01), Okudaira

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