1983-12-16
1986-07-29
Perkey, William B.
G03B 300
Patent
active
046028617
ABSTRACT:
An auto-focusing system includes a focus condition detector which detects the focus condition based on infrared light. A data producer is provided for producing a deflection signal indicating the difference between an image forming distance for infrared light and that for visible light, due to aberration. In accordance with the detected focus condition and deflection signal, an objective lens is shifted to a position for properly focusing an image of visible light on an image forming plane.
REFERENCES:
patent: 4182563 (1980-01-01), Biber et al.
patent: 4257705 (1981-03-01), Hosoe et al.
patent: 4488798 (1984-12-01), Iida et al.
patent: 4509842 (1985-04-01), Taniguchi et al.
Egawa Takeshi
Ishikawa Norio
Matsui Tohru
Matsushita Shuzo
Nakamura Akiyoshi
Minolta Camera Kabushiki Kaisha
Perkey William B.
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