G - Physics
03
B
88/99
G03B 21/00 (2006.01) F21S 8/00 (2006.01)
Patent
CA 1231569
ABSTRACT The present invention relates to a rainbow image projector adapted to project a vivid rainbow image from a relatively small light source onto walls of a stage, a store, places for various parties, and like. Specifically, light rays emitted from the linear incadescent light source are converted by a cylindrical condenser lens into parallel light rays which are, in turn, obliquely incident on a triangular prism over whole area of its first refraction plane. Thus, it is possible to project a vivid rainbow image of a large curvature radius from the small light source of small power consumption and heat generation. A housing containing therein said linear light source, cylindrical condenser lens and prism and provided with a projection window is inclination-adjustably mounted an inclination adjustment screw on a support leg so that a direction in which the rainbow image is projected may be variable. Said housing further comprises a blower for cooling contained therein and has a rear cover for exchange of the light source so that a useful life of the light source may be prolonged and maintenance and/or checking thereof may be easily done. -12 -
459751
Arai Akira
Robic Robic & Associes/associates
LandOfFree
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