Zoom lens system, imaging device and camera

Details Zoom lens system, imaging device and camera Zoom lens system, imaging device and camera

2008-01-15

2008-01-15

Mack, Ricky (Department: 2873)

Optical: systems and elements

Lens

With variable magnification

C359S695000, C359S754000, C359S784000, C396S079000, C353S101000

Reexamination Certificate

active

11157185

ABSTRACT:
An object is to provide a high-resolution zoom lens system which has fewer lens elements and therefore, can be retracted into a compact form when not in use; and the zoom lens system, in order from the object side, comprises a first lens unit G1having negative power, a second lens unit G2having positive power and a third lens unit G3having positive power, wherein magnification is varied with change in intervals between each lens unit by independently moving each lens unit along an optical axis, in which the first lens unit G1comprises one negative lens element L1and one positive lens element L2, the second lens unit G2comprises only a cemented lens element having set of three lens elements L3, L4and L5which are cemented with each other, and the third lens unit G3comprises one positive lens element L6.

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Chinese Office Action dated Jun. 1, 2007.
English Translation of Chinese Office Action Issued in Corresponding Chinese Patent Application No. 2005100814496, Dated on Jun. 1, 2007.

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