Photography – With exposure objective focusing means – focusing aid – or... – Optical detail with photoelement system
Reexamination Certificate
2007-03-30
2010-12-07
Fuller, Rodney E (Department: 2862)
Photography
With exposure objective focusing means, focusing aid, or...
Optical detail with photoelement system
C396S071000, C396S530000, C396S544000, C348S350000, C348S375000
Reexamination Certificate
active
07848630
ABSTRACT:
An autofocus adapter is provided and includes an imaging adapter optical system placed on an optical axis of an imaging lens when the autofocus adapter is attached, and a focus state detection adapter optical system placed on an optical axis different from the optical axis of the imaging lens when the autofocus adapter is attached. The imaging adapter optical system has a light split prism for splitting subject light passing through the imaging lens into imaging subject light and the focus state detection subject light, a first lens group having a negative power as a whole and placed on the object side with respect to the light split prism, and a second lens group having a positive power as a whole and placed on the image side with respect to the light split prism. The focus state detection adapter optical system has a positive lens group having the same lens configuration as the second lens group in the imaging adapter optical system.
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machine translation of JP2007-121748A.
Birch & Stewart Kolasch & Birch, LLP
Fujinon Corporation
Fuller Rodney E
Smith Linda B
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