Automatic focus control apparatus

Details Automatic focus control apparatus Automatic focus control apparatus

1986-10-03

1988-05-17

Adams, Russell E.

Radiant energy

Ionic separation or analysis

Static field-type ion path-bending selecting means

354402, 250201, G03B 300

Patent

active

047454253

ABSTRACT:
An apparatus for controlling a focal point of a photographing optical system of a camera is so designed that an overshooting amount of the photographing optical system from a braking timing of a driving means under the control of a driving controlling means is always monitored, and at the same time the overshooting amount is fed back to speed control of the driving means or control for determining a timing of the generation of a brake signal. The apparatus is capable of always and properly stopping the photographing optical system within a focus zone.

REFERENCES:
patent: 4537487 (1985-08-01), Taniguchi et al.
patent: 4550994 (1985-11-01), Maruyama
patent: 4557577 (1985-12-01), Shinoda

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