Illumination – Supported by vehicle structure – Condition responsive
Patent
1980-07-28
1981-12-08
Griffin, Donald A.
Illumination
Supported by vehicle structure
Condition responsive
362 16, 362297, G03B 1503, F21Y 700
Patent
active
043044794
ABSTRACT:
A photographic camera having either a built-in or detachably connectable electronic strobe light which provides a preferred illumination distribution over the field of view of the camera in order to maximize flash range and improve the quality of illumination for flash pictures. The strobe is provided with a reflector that is asymmetrically shaped about the horizontal plane having optical power which decreases at different rates about the horizontal plane. This arrangement provides a vertically asymmetric distribution of illumination over the picture area with the peak illumination occurring at the central upper part of the picture area. Side to side illumination of the picture is generally symmetric about the vertical axis and is controlled by a cylindrical Fresnel lens.
REFERENCES:
patent: 1235276 (1917-07-01), Wood
patent: 1367439 (1921-02-01), Thompson
patent: 1471767 (1923-10-01), Wood
patent: 1517322 (1924-12-01), Templin
patent: 2006140 (1935-06-01), Honing
patent: 3204542 (1965-09-01), Strasser et al.
patent: 3226536 (1965-12-01), Atkin et al.
patent: 3286611 (1966-11-01), Lange
patent: 3375361 (1968-03-01), Thompson et al.
patent: 3458696 (1969-07-01), Kapteyn et al.
patent: 3609332 (1971-09-01), Schindler
patent: 3783261 (1974-01-01), Hartmann
patent: 4017727 (1977-04-01), Yamamoto
patent: 4078240 (1978-03-01), Kancko
patent: 4194234 (1980-03-01), Geissler
patent: 4231645 (1980-11-01), Davis et al.
Caufield Francis J.
Griffin Donald A.
Polaroid Corporation
LandOfFree
Photographic lighting apparatus 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 lighting apparatus, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Photographic lighting apparatus will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-565543