Zoom lens having magnification factors in the range of 20X to 47

Details Zoom lens having magnification factors in the range of 20X to 47 Zoom lens having magnification factors in the range of 20X to 47

1987-04-01

1988-06-14

Corbin, John K.

G02B 1514, G02B 1708

Patent

active

047508205

ABSTRACT:
A zoom lens system having magnification factors in the range of 20 to 47. The lens system of the present invention is particularly useful in micrographic reader/printers.

REFERENCES:
patent: 3354776 (1967-11-01), Smitzer et al.
patent: 3360325 (1967-12-01), Gustafson
patent: 3482901 (1969-12-01), Melech
patent: 3582203 (1971-06-01), Cox
patent: 3724927 (1973-04-01), Cox

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