Focus detection device and method

Details Focus detection device and method Focus detection device and method

1995-06-30

1996-12-24

Metjahic, Safet

Photography

With exposure objective focusing means, focusing aid, or...

Optical detail with photoelement system

396128, G03B 300

Patent

active

055877630

ABSTRACT:
A focus detection device permits accurate focus detection within a short length of time. The detection is quick even if there is an error between the output signal strings of a pair of image sensors when the photo lens is in the focused condition. A pair of effective signal strings is extracted from a pair of output signal strings of a pair of photoelectric conversion arrays. The extraction of the pair of effective signal strings is based on a numerical value relating to an error amount between the output signal strings when the photo lens is in the focused condition. The focus adjustment condition of the photo lens is calculated based on the pair of effective signal strings.

REFERENCES:
patent: 5357310 (1994-10-01), Kawamura et al.
patent: 5359383 (1994-10-01), Miida et al.
patent: 5467163 (1995-11-01), Uchiyama
patent: 5469240 (1995-11-01), Uchiyama et al.
patent: 5485002 (1996-01-01), Kusaka
patent: 5485003 (1996-01-01), Kusada

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