Illumination – Light source and modifier – Adjustable or repositionable light source or light source...
Patent
1992-03-19
1994-11-29
Cole, Richard R.
Illumination
Light source and modifier
Adjustable or repositionable light source or light source...
362263, 362269, 362298, F21V 2130
Patent
active
053695577
ABSTRACT:
A searchlight (40) includes a high-power xenon-arc lamp (12) having a longitudinal axis (16), and an anode (18) and cathode (20) which are spaced from each other along the axis (16). The lamp (12) becomes inoperative when the anode (18) is disposed below the cathode (20) by more than a small distance. A first reflector (28) is integrally movable with the lamp (12) and has a parabolic reflecting surface (28a) for collecting light from the lamp (12) and reflecting the collected light generally parallel to the axis (16) as a beam (34). A second reflector (44) is also integrally movable with the lamp (12) for receiving the beam (34) from the first reflector (28) and reflecting the beam (48) away from the axis (16) at a right angle. With the anode (18) of the lamp (12) maintained at the same height as or above the cathode (20) and the searchlight (40) rotated such that the axis (16) sweeps a 180.degree. arc from horizontal through vertical to horizontal, the beam (48) from the second reflector (44) sweeps a 180.degree. arc from vertically downward through horizontal to vertically upward. The xenon-arc lamp (12) produces an arc (25) including proportionally more short wavelength light, notably blue light, than in sunlight. The first and/or second reflectors (28,44) have gold reflecting surfaces (43,44d) which partially attenuate shorter wavelength light from blue through ultraviolet such that the beam (48) more closely approximates sunlight for better color rendition of illuminated objects.
REFERENCES:
patent: 329930 (1930-05-01), Roche
patent: 892087 (1908-06-01), Rey
patent: 1279096 (1918-09-01), Gerald
patent: 1659897 (1928-02-01), Schoenfeld
patent: 1683895 (1928-09-01), Jacob
patent: 3202811 (1965-08-01), Hall, Jr.
patent: 3443086 (1969-05-01), Rikis
patent: 3648045 (1972-03-01), Le Yantine et al.
patent: 3702395 (1972-11-01), Rosendahl
patent: 3758769 (1973-09-01), Pichel
patent: 4423471 (1983-12-01), Gordin et al.
patent: 4510558 (1985-04-01), van den Brink
patent: 4729077 (1988-03-01), Gordin et al.
patent: 4935853 (1990-06-01), Collins
Van Nostrands's Scientific Encyclopedia, 7th Ed., Van Nostrand Reinhold, 1989, p. 1524.
CRC Handbook of Tables for Applied Engineering Science, 2nd Ed., CRC Press, 1973, p. 679.
Cole Richard R.
Denson-Low W. K.
Gudmestad Terje
Hughes Aircraft Company
Leitereg Elizabeth E.
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