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US 2006/0077667 A1Published application
Lighting device
AssigneeChoon Nang Electrical Appliance Mfy., Ltd.
InventorsTat Lui, Scott Fong, Chao Jian
Life of this patent
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Abstract
A lighting device (50) comprises a light source (40) e.g. LED, a convex reflector (43) for receiving light from the LED (40), and a concave reflector (41) for receiving light from the convex reflector (43). A relatively narrow angled light beam from the LED (40) is diverged by the convex reflector (43) and then converged by the concave reflector (41) into a relatively broader parallel light beam. The two reflectors (43 & 41) may be replaced by plano-concave and convex lens (143 & 141) respectively.
Claims21
A lighting device comprising:
- a light source for emitting a relatively narrow angled light beam about a central axis;
- a divergent optical element located forward of the light source for receiving light therefrom, the divergent optical element having a central axis aligned with that of the light source;
- and
- a convergent optical element located forward of the light source for receiving light from the divergent optical element, the convergent optical element having a central axis aligned with that of the divergent optical element;
- whereby a relatively narrow angled light beam from the light source is diverged by the divergent optical element and then converged by the convergent optical element into a relatively broader substantially parallel light beam.
2 more elements
Dependencies are inferred from the claim text.