Dual intensity ultraviolet lamp
AssigneeLight Sources, Inc.
InventorsEugene Czako, Edward A. Stokes
Life of this patent
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Abstract
A fluorescent lamp having multiple discrete zones with different levels of radiation intensity along its length has a tube with a fluorescent coating on the interior of the tube adapted to produce ultraviolet radiation of substantially uniform intensity. A reflective coating is provided along a finite length of the tube adjacent one end thereof and about only a portion of the circumference thereof to provide an increased intensity of radiation emanating from the uncoated portion of the periphery of the lamp in the finite portion due to reflection of radiation from the reflective coating. This lamp is especially useful in an array for a tanning chamber to provide a higher intensity of ultraviolet radiation in the facial area.
Claims13
A fluorescent lamp having multiple discrete zones with different levels of radiation intensity along its length comprising:
- (a) a tube;
- (b) a fluorescent coating on the interior of said tube adapted to produce ultraviolet radiation of substantially uniform intensity;
- and
- (c) a reflective coating along a finite length of said tube adjacent one end thereof and about only a portion of the circumference thereof to provide an increased intensity of radiation emanating from the uncoated portion of the periphery of said lamp in said finite portion.
A fluorescent tanning lamp having multiple discrete zones with different levels of radiation intensity along its length comprising:
- (a) a tube;
- (b) a fluorescent coating on the interior of said tube for producing ultraviolet radiation of substantially uniform intensity along the length thereof;
- and
- (c) a reflective coating along a finite length of about 8-18 inches of said tube adjacent one end thereof and about only a portion of the circumference thereof comprising an arc of 150.degree.-210.degree.to provide an increased intensity of radiation emanating from the uncoated portion of the periphery of said lamp in said finite length, the intensity of radiation emanating in said finite length is ten to fifty percent greater than the intensity of radiation in the remainder of said lamp.
A fluorescent tanning lamp assembly for a tanning chamber comprising an array of a multiplicity of parallel spaced elongated lamps having multiple discrete zones with different levels of radiation intensity along their length and each comprising:
- (a) a tube;
- (b) a fluorescent coating on the interior of said tube adapted to produce ultraviolet radiation of substantially uniform intensity;
- and
- (c) a reflective coating along a finite length of about 8-18 inches of said tube adjacent one end of said array and about only a portion of the circumference thereof to provide an increased intensity of radiation emanating from the uncoated portion of the periphery of said lamp in said finite length.
The fluorescent tanning lamp assembly in accordance with 9 wherein said finite length is about 8-18 inches.
The fluorescent tanning lamp assembly in accordance with 9 wherein such reflective coating includes metallic oxide particles.
Dependencies are inferred from the claim text.