Sonar responsive shutter blade time out control circuit

Details Sonar responsive shutter blade time out control circuit Sonar responsive shutter blade time out control circuit

1980-09-22

1981-09-22

Gellner, Michael L.

354 23D, 354 27, 354195, G03B 300, G03B 7097

Patent

active

042906830

ABSTRACT:
An exposure control circuit for a photographic camera is provided for determining the camera-to-subject range directly by sonic ranging and for automatically responding to the sonically determined subject range to provide either a shortened maximum exposure interval time out period under conditions where the photographic subject is located far enough from the camera as to be just beyond the effective range of the flash or within the effective range of the flash but without sufficient reflectance to effect the termination of exposure solely as a function of scene light integration or an extended maximum exposure interval time out period under conditions where the photographic subject is located far enough from the camera as to be far beyond the effective range of the flash where there is likely to be little or no reflected flash light.

REFERENCES:
patent: 3522763 (1970-08-01), Dietz
patent: 3620143 (1971-11-01), Burgarella
patent: 3942183 (1976-03-01), Whiteside
patent: 4023187 (1977-05-01), Shenk
patent: 4040072 (1977-08-01), Johnson et al.
patent: 4192587 (1980-03-01), La Rocque et al.

Affiliated with

Also associated with

Rating

Sonar responsive shutter blade time out control circuit does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Sonar responsive shutter blade time out control circuit, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Sonar responsive shutter blade time out control circuit will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-332528