TTL multiple flash control device

Details TTL multiple flash control device TTL multiple flash control device

1991-10-21

1993-06-22

Perkey, W. B.

354416, 354432, G03B 1505

Patent

active

052219410

ABSTRACT:
In a TTL multiple flash control device, information obtained from a preliminary flash emission is used to limit the quantity of light in a subsequent main flash emission. Electric signals produced from a plurality of photoelectric converters that receive reflected preliminary flash light, and that correspond to a plurality of photometric areas of an object field, are logarithmically transformed and peak detected to produce a field reflection distribution. Weighting coefficients determined from the field reflection distribution are used to weight the outputs of the photoelectric converters during main flash emission.

REFERENCES:
patent: 3823410 (1974-07-01), Tokutomi et al.
patent: 4319813 (1982-03-01), Aoki et al.
patent: 4549801 (1985-10-01), Winter
patent: 4808811 (1989-02-01), Kumakura et al.
patent: 5006879 (1991-04-01), Takagi et al.
Patent Abstracts of Japan, vol. 14, No. 286 (P-1064) Jun. 20, 1990.

Affiliated with

Also associated with

Rating

TTL multiple flash control device does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with TTL multiple flash control device, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and TTL multiple flash control device will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1443788