Patent
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
Buckingham Stephen W.
Corbin John K.
Gass Rebecca D.
Minnesota Mining and Manufacturing Company
Sell Donald M.
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