Zoom optical system

Details Zoom optical system Zoom optical system

2006-06-13

2008-10-28

Collins, Darryl J (Department: 2873)

Optical: systems and elements

Lens

With variable magnification

C359S720000

Reexamination Certificate

active

07443601

ABSTRACT:
At least one exemplary embodiment is directed to a zoom optical system which includes a plurality of variable power optical units of which optical power varies accompanied by variable power, a fixed optical unit of which optical power does not vary accompanied by variable power, and a moving optical unit which moves accompanied by variable power.

REFERENCES:
patent: 3305294 (1967-02-01), Alvarez
patent: 3583790 (1971-06-01), Baker
patent: 6850372 (2005-02-01), Stenton
patent: 7193785 (2007-03-01), Yoshida et al.
patent: 2-119103 (1990-05-01), None
Keisuke Araki, “Paraxial Analysis for Off-Axial Optical Systems”, Japanese Journal of Optics, vol. 29, No. 3, 2000.

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