1989-06-19
1990-05-01
Adams, Russell E.
3541951, G03B 300
Patent
active
049222791
ABSTRACT:
An automatic focus adjusting apparatus for adjusting automatically a focus condition of an objective lens includes a CCD array for receiving light from an object and producing a accumulated charge signal representing the accumulated charge. Using the accumulated charge signal it is detected whether or not the brightness of the object is above a predetermined level, and at the same time, the focusing condition of the objective lens is calculated. Using the calculated result, the focusing condition of the objective lens is adjusted in a controlled manner such that: when the brighness of the object is above the predetermined level, the objective lens moves even during the CCD array is operated to carry out the charge accumulation; but when the brightness of the object is below the predetermined level, the CCD array is operated only during when the objective lens is making no movement.
REFERENCES:
patent: 4348089 (1982-09-01), Shenk
patent: 4359276 (1982-11-01), Tomori
patent: 4387975 (1983-06-01), Araki
patent: 4445761 (1984-05-01), Ishikawa et al.
patent: 4477167 (1984-10-01), Ishikawa et al.
patent: 4477169 (1984-10-01), Terui et al.
patent: 4482234 (1984-11-01), Takagi et al.
patent: 4492448 (1985-01-01), Ishikawa et al.
patent: 4509842 (1985-04-01), Taniguchi et al.
patent: 4525053 (1985-06-01), Sniokama et al.
patent: 4536072 (1985-08-01), Taniguchi et al.
patent: 4825238 (1989-04-01), Akashi
Akada Yasuaki
Hamada Masataka
Ishida Tokuji
Adams Russell E.
Minolta Camera Kabushiki Kaisha
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