Illumination – Light source and modifier – Including selected wavelength modifier
Patent
1980-10-14
1983-06-14
Nelson, Peter A.
Illumination
Light source and modifier
Including selected wavelength modifier
362 33, 362347, 362 98, 362318, 362127, 362322, 362294, 362296, 362310, 362345, F21Y 900
Patent
active
043886787
ABSTRACT:
This invention provides an improved reading or viewing lamp that achieves extraordinary visual acuity when properly used. The lamp employs a quartz-halogen bulb together with a parabolic lens to provide a collimated beam. A light filter removes heat radiation and ultra violet radiation from the beam. A convex mirror reflects the filtered light beam to the reading or viewing area where because of the point source characteristic of the bulb and the remaining optics, the rays are substantially non-crossing and transversely coherent in the reading or viewing area. In one embodiment, the collimated beam is directed vertically and tubular light shield surrounding the collimated light beam and a cylindrical shield around the convex mirror reduces transverse radiation of light to other parts of the room. The shield around the collimated beam also provides a chimney effect which disperses the heat throughout the room to points remote from the reader.
REFERENCES:
patent: 2744192 (1956-05-01), Rosenthal
patent: 3087381 (1963-04-01), Moffatt
patent: 3586851 (1971-06-01), Rudolph
patent: 3984673 (1976-10-01), Gray
patent: 4232362 (1980-11-01), Williams et al.
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