Imaging optical system, camera apparatus, and personal...

Details Imaging optical system, camera apparatus, and personal... Imaging optical system, camera apparatus, and personal...

2011-01-11

2011-01-11

Collins, Darryl J (Department: 2873)

Optical: systems and elements

Lens

Multiple component lenses

C359S754000, C359S794000

Reexamination Certificate

active

07869143

ABSTRACT:
An imaging optical system, including a first lens group; an aperture stop; a second lens group having a positive power, the first lens group, the aperture stop and the second lens group being arranged from a side of an object sequentially, wherein the second lens group includes a second front lens group having a positive power and a second rear lens group having a positive power, the second front lens group and the second rear lens group being arranged sequentially from the object side, wherein, when focusing from an infinity-distance object to a short-distance object, the first lens group and the aperture stop are fixed, and the second front lens group and the second rear lens group are moved with a mutually different movement amount.

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European Patent Office Communication dated Aug. 19, 2009.

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