Wide-angle lens and imaging apparatus

Details Wide-angle lens and imaging apparatus Wide-angle lens and imaging apparatus

2008-08-05

2010-02-16

Collins, Darryl J (Department: 2873)

Optical: systems and elements

Lens

Multiple component lenses

C359S793000

Reexamination Certificate

active

07663816

ABSTRACT:
Providing a large aperture wide-angle lens having high optical performance with sufficiently suppressed spherical aberration and sagittal coma flare, and an imaging apparatus using the lens. The lens including, in order from an object, a first lens group having positive refractive power, and a second lens group having positive refractive power, the second lens group being movable for focusing and including a 21 lens component having positive refractive power, a 22 lens component having negative refractive power, a 23 lens component having positive refractive power, and a 24 lens component having positive refractive power, and given conditions being satisfied.

REFERENCES:
patent: 5589988 (1996-12-01), Suenaga
patent: 2009/0059393 (2009-03-01), Obama
patent: 63-61213 (1988-03-01), None
patent: 6-308385 (1994-11-01), None
patent: 11-211978 (1999-08-01), None

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