Television – Camera – system and detail – Optics
Patent
1996-03-18
2000-12-19
Garber, Wendy
Television
Camera, system and detail
Optics
348351, G03B 1300
Patent
active
061633402
ABSTRACT:
An automatic focus adjusting device is provided with an AF evaluation value detecting circuit for detecting an AF evaluation value indicative of a focusing state of a lens, a lens driving part for moving the lens in an optical axis direction, a control circuit for controlling the lens driving part on the basis of the AF evaluation value detected by the AF evaluation value detecting circuit in such a way as to cause the lens to move back and forth by a predetermined amount of movement at a time until the AF evaluation value becomes a maximum value, an inversion detecting circuit for detecting inversion of a direction of movement of the lens, and an altering circuit for altering the predetermined amount of movement of the lens in response to detection of the inversion by the inversion detecting circuit.
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Canon Kabushiki Kaisha
Garber Wendy
Moe Aung S.
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