Focus condition indicating device of an auto-focus system

Details Focus condition indicating device of an auto-focus system Focus condition indicating device of an auto-focus system

1983-01-28

1986-06-10

Hix, L. T.

G03B 1720

Patent

active

045939888

ABSTRACT:
A device for indicating the current focus condition of an auto-focus system for use in a camera and the like includes an indication processing circuit interposed between an arithmetic processing circuit, which receives distance information to an object of interest, and an indicator/controller. The indication processing circuit allows to maintain the detected in-focus condition sufficiently long so that an observer can judge the proper focus condition even if the object is in slight motion, or the camera is being held by hands.

REFERENCES:
patent: 4126870 (1978-11-01), Kondo
patent: 4303321 (1981-12-01), Enomoto et al.
patent: 4307947 (1981-12-01), Jyoujiki
patent: 4336987 (1982-06-01), Shenk
patent: 4352545 (1982-10-01), Uno et al.

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