Variable magnification lens system

Details Variable magnification lens system Variable magnification lens system

1976-03-03

1977-12-06

Clark, Conrad J.

350215, G02B 1514

Patent

active

040614190

ABSTRACT:
A variable magnification lens is exemplified by a 6-element symmetrical zoom lens for use between fixed conjugates at magnification ranging from 1.007X to 0.615X. The outer elements remain fixed relative to the unit. The inner elements form two integral pairs on each side of the central aperture and move symmetrically with respect to it to effect magnification change while maintaining a substantially flat image field over the entire magnification range.

REFERENCES:
patent: 2663223 (1953-12-01), Hopkins
patent: 3687522 (1972-08-01), Lynch
patent: 3728010 (1973-04-01), Mikami

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