Illumination – Light source and modifier – Including reflector
Patent
1992-03-11
1992-11-17
Cole, Richard R.
Illumination
Light source and modifier
Including reflector
362261, 362293, F21V 708
Patent
active
051637502
ABSTRACT:
A light apparatus disclosed is high in utilization factor of light, simple in structure and suitable for mass production. The light apparatus includes a hollow single-part reflecting plate (11) having a spheroidal mirror on an inner face thereof and a discharge tube (13) mounted at a forward opening of the reflecting plate. The discharge tube has a double layer tube structure consisting of an elongated light emitting tube (16) and an outer tube (18) surrounding the light emitting tube. A reflecting face (26) is formed on the outer tube such that it connects to the spheroidal mirror to form a closed spheroidal face. The reflecting face is formed by mounting a cold mirror on a surface of the outer tube, and a light extracting portion (25) is formed on an outer wall of the outer tube by mounting a cold filter thereat. Light reflected from the light emitting tube is repetitively reflected by the reflecting plate and the reflecting face so that almost all of the light is discharged through the light extracting portion.
REFERENCES:
patent: 1815751 (1931-07-01), Whalen
patent: 2441824 (1948-05-01), Kurlander
patent: 3088023 (1963-04-01), Ayroldi
patent: 4389968 (1983-06-01), Cibie
patent: 4883333 (1989-11-01), Yanez
patent: 4958263 (1980-09-01), Davenport et al.
Cole Richard R.
Kananen Ronald P.
Sony Corporation
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