Zoom lens

Details Zoom lens Zoom lens

2011-03-22

2011-03-22

Collins, Darryl J (Department: 2873)

Optical: systems and elements

Lens

With support

C359S676000

Reexamination Certificate

active

07911719

ABSTRACT:
The invention provides a zoom lens, including a plurality of lens groups. When the zoom lens is in operation, the plurality of lens groups are aligned on a common optic axis, and the zoom lens forms a first plane and a second plane conjugated with the first plane. To retract the zoom lens, at least one of the lens groups is rotated around an axis perpendicular to the common optical axis and toward the first plane, and at least one of the rest of the lens groups is moved toward the second plane along the common optical axis. As a result, overall length of the zoom lens is shortened when it is retracted to obtain the miniaturization.

REFERENCES:
patent: 6978089 (2005-12-01), Nomura
patent: 7013081 (2006-03-01), Nomura
patent: 7019915 (2006-03-01), Sakamoto
patent: 7035019 (2006-04-01), Sakamoto
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patent: 7131773 (2006-11-01), Sakamoto
patent: 7199950 (2007-04-01), Sasaki
patent: 7224536 (2007-05-01), Nomura
patent: 7265918 (2007-09-01), Sasaki
patent: 7301577 (2007-11-01), Sakamoto
patent: 2008/0088732 (2008-04-01), Lin
patent: 2009/0195886 (2009-08-01), Hankawa et al.

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