Automatic focus adjusting apparatus

Details Automatic focus adjusting apparatus Automatic focus adjusting apparatus

1995-03-27

1999-07-13

Garber, Wendy

Television

Camera, system and detail

Optics

348351, 396 79, 396 96, H04N 5232

Patent

active

059233710

ABSTRACT:
An automatic focus adjusting apparatus comprises: a focus detecting circuit for detecting a focusing state and generating a signal according to the focusing state; a speed control circuit to switch a focus adjusting speed to a plurality of stages on the basis of an output of the focus detecting circuit; a depth detecting circuit to detect a depth of field; and a control circuit to change a threshold value of a speed switching point in the speed control circuit on the basis of an output of the depth detecting circuit.

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patent: 4841370 (1989-06-01), Murashima et al.
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patent: 5040015 (1991-08-01), Hamada et al.
patent: 5212516 (1993-05-01), Yamada et al.
patent: 5396336 (1995-03-01), Yoshii et al.
patent: 5402175 (1995-03-01), Tanaka
patent: 5604538 (1997-02-01), Kaneda et al.
patent: 5739858 (1998-04-01), Suda et al.

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