Radiant energy – Ionic separation or analysis – Static field-type ion path-bending selecting means
Patent
1990-02-28
1990-12-25
Perkey, W. B.
Radiant energy
Ionic separation or analysis
Static field-type ion path-bending selecting means
2502012, G03B 1336, G02B 728
Patent
active
049807153
ABSTRACT:
An automatic focus adjusting apparatus for adjusting a photo-taking lens of a camera employs a focus detecting device that includes a charge storage type image sensor device and a calculating device for calculating a defocus amount on the basis of the output of the charge storage type image sensor device. The charge storage type image sensor device stores charges according to incident light thereon during a charge storage period, and the calculating device calculates the defocus amount during a calculating period. In one embodiment, during the charge storage period and the calculating period, the photo-taking lens is driven at a constant speed on the basis of a correction amount required for the pursuit of a moving object to be photographed. After the calculating period the phototaking lens is driven on the basis of the defocus amount. Features of the invention are concerned with producing convergence deficiency signals; multiplying convergence deficiency signals by coefficients to provide correction amounts; controlling a mirror-up operation in accordance with whether an object moves; and determining whether an object moves.
REFERENCES:
patent: 4387975 (1983-06-01), Araki
patent: 4531157 (1985-07-01), Ishikawa
patent: 4671640 (1987-06-01), Akada et al.
patent: 4702584 (1987-10-01), Taniguchi et al.
patent: 4783677 (1988-11-01), Hamada et al.
Nikon Corporation
Perkey W. B.
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