Illumination – Photographic lighting – Including specific light modifier
Patent
1993-05-27
1995-02-28
Lazarus, Ira S.
Illumination
Photographic lighting
Including specific light modifier
362217, 362298, 362349, 362263, G03B 1502
Patent
active
053943074
ABSTRACT:
A photographic flash device includes a bar-like flash discharge tube for emitting light, and a reflector having a rectangular-shaped opening for irradiating light beams emitted from the flash discharge tube toward and through the rectangular-shaped opening. The dimension of the depth of opposing side wall portions of the reflector for reflecting light beams along the long side of the opening of the flash discharge tube is longer than that of an inner part of the reflector whose cross section is a curved surface nearly substantially semi-elliptical in shape, which cross section covers the flash discharge tube. Light beams directed beyond an angle of view are reflected by the elongated opposing side wall portions so that they are kept within the angle of view. The opposing extreme edge portions of the upper and lower reflection plates along the long side of the opening of the reflector are extended toward the front by means of parallel flat reflection plates whose inner surfaces are reflective.
REFERENCES:
patent: 3484597 (1969-12-01), Schmidt
patent: 4141057 (1979-02-01), Dietrich et al.
patent: 4156890 (1979-05-01), Herbert et al.
patent: 4179726 (1979-12-01), Aron
patent: 4404618 (1983-09-01), Yamada et al.
patent: 5047900 (1991-09-01), DiRisio
patent: 5154503 (1992-10-01), Sternsher
Lazarus Ira S.
Olympus Optical Co,. Ltd.
Raab Sara Sachie
Weinstein Louis
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