Television – Special applications – Manufacturing
Patent
1992-11-12
1994-11-29
Razavi, Michael T.
Television
Special applications
Manufacturing
348130, 348345, H04N 5232
Patent
active
053694309
ABSTRACT:
A focus detecting method includes the step of projecting the real image of an observation object including a plurality of object patterns onto an image pickup device through an optical system and producing image data from an output of the image pickup device, the step of calculating correlation values of the image data of each of the plurality of object patterns and the image data of a prestored reference pattern while varying the relative positional relation among the image pickup device, the optical system and the observation object in the direction of the optical axis of the optical system, and the step of judging a relative positional relation giving the maximum correlation value as an in-focus state. An apparatus is provided for carrying out the above-described focus detecting method.
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Greening Wendy R.
Nikon Corporation
Razavi Michael T.
LandOfFree
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