Optical: systems and elements – Lens – With variable magnification
Patent
1991-12-13
1993-12-14
Arnold, Bruce Y.
Optical: systems and elements
Lens
With variable magnification
359683, 359692, 359740, G02B 1514
Patent
active
052708616
ABSTRACT:
A zoom lens system including a first lens unit of positive power and a second lens unit of negative power with the axial separation therebetween varies to bring about zooming. The first lens unit includes at least one positive lens element and at least one negative lens element and the second lens unit consists of a biconcave negative lens element having a strong curvature towards the front.
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Arnold Bruce Y.
Eastman Kodak Company
Phan James
Treash, Jr. Leonard W.
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