Photographic flash device

Details Photographic flash device Photographic flash device

1988-05-09

1989-04-11

Perkey, W. B.

Illumination

Supported by vehicle structure

Condition responsive

362 18, 362278, G03B 1503, F21V 716

Patent

active

048210536

ABSTRACT:
Photographic flash device has its trough-shape reflector formed of a laminate of first and second sheets of piezoelectric material so polarized relative to one another that a change in potential across the laminate, applied by electrodes on the laminate, causes a flexing of the laminate and hence a change in the light pattern on the subject being photographed. Such a flash device is useful with zoom camera.

REFERENCES:
patent: 3839632 (1974-10-01), Federico
patent: 4323952 (1982-04-01), Proske
patent: 4423940 (1984-01-01), Kashihara et al.
patent: 4594645 (1986-06-01), Terashita
patent: 4666280 (1987-05-01), Miyawaki et al.
patent: 4729065 (1988-03-01), Bahnemann et al.

Affiliated with

Also associated with

Rating

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

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-669702