Television – Camera – system and detail – Optics
Reexamination Certificate
2007-07-31
2007-07-31
Ometz, David (Department: 2622)
Television
Camera, system and detail
Optics
C348S370000, C348S371000, C348S353000
Reexamination Certificate
active
10433235
ABSTRACT:
An image pickup apparatus for electronically photographing a still image using a photo-voltaic transducer device. The focusing position of a focusing lens is detected from the contrast of the photographed image as AF supplementary light is illuminated on the object. The focusing lens then is moved to its focusing position and the contrast of the photographed image, in both the state where the AF supplementary light is illuminated and the contrast in the state where the AF supplementary light is not illuminated, is calculated. The contrast ratio between the contrast values of the two states is estimated and the focusing position is corrected based on this ratio.
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Frommer William S.
Frommer & Lawrence & Haug LLP
Ometz David
Prabhakher Pritham
Presson Thomas F.
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