Illumination – Light source and modifier – With ventilating – cooling or heat insulating means
Patent
1993-07-20
1994-10-04
Lazarus, Ira S.
Illumination
Light source and modifier
With ventilating, cooling or heat insulating means
362 6, 362232, 362275, 362287, 362372, 362373, 362419, F21V 2900
Patent
active
053532112
ABSTRACT:
A light modifier for illuminating a subject using a combined modeling/strobe light source as the light source. This light assembly is attached to an adjustable focusing mechanism enabling the light to be projected either as a spot or a flood. The light is intended mainly for professional studio use, and is generally placed away from the camera.
The main body of the light housing is molded of one piece plastic and attached to a yoke assembly by two adjustable knobs which control the vertical rotation of the light. The back of the housing is open with light-baffle plate preventing light from spilling from the rear of the housing, while allowing for free air circulation around the light-baffle plate. The design allows the unit to rotate 360 degrees around the yoke axis. It may be mounted on a light stand, or other support structures such as an overhead rack.
The light is equipped with a fresnel lens molded of transparent plastic having the fresnel facets closely spaced on outside-facing (long conjugate) side. The lens is sand blasted or chemically "frosted" on the inside-facing (short conjugate) side, resulting in a softer, more diffused, light. Because the fresnel facets are shallow in depth and spaced very closely together, the illumination is uniform and free of hot "spots or rings," normally associated with glass fresnel lenses. The lens can be drilled and is joined to the light housing by arrangement of fasteners and spacers, an arrangement which provides for free air circulation around the lens edges.
REFERENCES:
patent: 2287328 (1942-06-01), Rose
patent: 2307301 (1943-01-01), Richardson
patent: 3116022 (1963-12-01), Davis
patent: 4017727 (1977-04-01), Yamamoto
patent: 4097919 (1978-06-01), Bobrick et al.
patent: 4141059 (1979-02-01), Shiojiri
patent: 4190880 (1980-02-01), Esaki
patent: 4419716 (1983-12-01), Koo
patent: 4460942 (1984-07-01), Pizzuti
patent: 4533984 (1985-08-01), Gatton
Cariaso Alan B.
Lazarus Ira S.
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