Radiant energy – Ionic separation or analysis – Static field-type ion path-bending selecting means
Patent
1988-02-26
1989-08-29
Perkey, W. B.
Radiant energy
Ionic separation or analysis
Static field-type ion path-bending selecting means
250204, G03B 300
Patent
active
048622044
ABSTRACT:
A focus detection device which repeatedly calculates correlations between first and second image signals representing light intensity distributions on first and second image sensor arrays by shifting one of the image signals relative to the other to find an amount of shift affording the highest correlation includes shift range restriction means for restricting the shift range for the present correlation calculation in accordance with the amount of shift found through the last correlation calculation to afford the highest correlation. The shift range restriction is inhibited when the result of the last correlation calculation was not reliable indicating an infeasible condition of the focus detection.
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Hamada Masataka
Ishida Tokuji
Karasaki Toshihiko
Norita Toshio
Taniguchi Nobuyuki
Minolta Camera Kabushiki Kaisha
Perkey W. B.
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