Digital control system for automatic-focus cameras

Details Digital control system for automatic-focus cameras Digital control system for automatic-focus cameras

1981-06-11

1982-08-10

Dobeck, B.

Electricity: motive power systems

Positional servo systems

With particular 'error-detecting' means

318480, 354 25, 250201, G05B 106

Patent

active

043440240

ABSTRACT:
A digital control circuit for use in automatic-focus cameras is disclosed, which is suitable for use in self-focusing systems which determine focus by means of triangulation. The system corrects for motor oscillation about a state of proper focus, defocusing caused by inertia, and for an inability to evaluate proper state of focus caused by large distances between the camera and a subject.

REFERENCES:
patent: 3935524 (1976-01-01), Cap et al.
patent: 4072962 (1978-02-01), Maida
patent: 4239354 (1980-12-01), Shenk
patent: 4291223 (1981-09-01), Sakane et al.

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