Photography – With exposure objective focusing means – focusing aid – or... – Lens characteristic compensating
Reexamination Certificate
2005-09-06
2005-09-06
Nguyen, Judy (Department: 2851)
Photography
With exposure objective focusing means, focusing aid, or...
Lens characteristic compensating
C396S104000, C348S345000
Reexamination Certificate
active
06941068
ABSTRACT:
An image pickup apparatus which can perform focusing control with high speed and high precision is disclosed. The image pickup apparatus comprises a focus detection unit that detects a focusing state of the image-taking lens by phase difference detection method using light from the image-taking lens, and an in-focus judgment unit judges whether the image-taking lens is in an in-focus state or not, based on a result of a detection of contrast of an object image that has been taken with an image pickup device. Correction information, for correcting focusing control information of the image-taking lens that has been obtained by using the focus detection unit, is obtained based on information indicating the in-focus state of the lens obtained by using the in-focus judgment unit.
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Nguyen Judy
Smith Arthur A
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