Focus detection apparatus

Details Focus detection apparatus Focus detection apparatus

1984-01-30

1985-12-31

Perkey, William B.

Radiant energy

Ionic separation or analysis

Static field-type ion path-bending selecting means

250204, C03B 300

Patent

active

045617490

ABSTRACT:
A focus detection apparatus has a pair of photoelectric element arrays, a plurality of filters having different MTF characteristics, and an operation unit. A filter is selected from the plurality of filters in accordance with an object or a focusing state. The selected filter filters the data from the photoelectric element arrays, and the operation unit calculates a focus detection signal based on the filtered data.

REFERENCES:
patent: 4203031 (1980-05-01), Kamachi et al.
patent: 4428652 (1984-01-01), Sakai et al.
patent: 4470676 (1984-09-01), Kinoshita et al.

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