Zoom lens

Details Zoom lens Zoom lens

2007-11-21

2009-06-16

Thompson, Timothy J (Department: 2873)

Optical: systems and elements

Lens

With variable magnification

C359S680000, C359S694000

Reexamination Certificate

active

07548380

ABSTRACT:
A zoom lens is disclosed. The zoom lens comprises a first lens group located adjacent to an object side and having a negative refractive power, and a second lens group located adjacent to an image side and having a positive refractive power, wherein zooming is made as an interval between the first lens group and the second lens group is varied.

REFERENCES:
patent: 6259508 (2001-07-01), Shigematsu
patent: 7283314 (2007-10-01), Nanba
patent: 7295381 (2007-11-01), Ito
patent: 7446956 (2008-11-01), Shimada
patent: 2001/0036020 (2001-11-01), Yamamoto

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