Focusing controller

Details Focusing controller Focusing controller

1994-08-03

1996-01-16

Adams, Russell E.

Optics: measuring and testing

Range or remote distance finding

With photodetection

354403, 356 31, G03B 1336

Patent

active

054852404

ABSTRACT:
A focusing controller for photographic apparatuses includes: a distance meter which detects film-to-object distance to calculate and emit a distance signal; a lens shifting distance calculating device which calculates a lens shifting distance for effecting focusing in a focusing optical system on the basis of the distance signal by using one or two or more linear expressions; and a driving device for driving the focusing optical system in accordance with the lens shifting distance; the focusing controller allowing both the lens shifting amount for the focusing optical system and the reciprocal of film-to-object distance to be set at equal intervals.

REFERENCES:
patent: 4841325 (1989-06-01), Hoshino
patent: 4938588 (1990-07-01), Taniguchi
patent: 5005970 (1991-04-01), Kunishige
patent: 5136148 (1992-08-01), Nonaka
patent: 5138356 (1992-08-01), Nakamura et al.

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