Lens assembly

Details Lens assembly Lens assembly

2006-09-29

2010-10-12

Bruce, David V (Department: 2875)

Illumination

Light modifier

Refractor

C362S328000

Reexamination Certificate

active

07810962

ABSTRACT:
A lens assembly (4) comprises a body (6) formed from a transparent material. The body (6) is mounted on an LED chip (8) comprising an LED (10). The LED (10) is disposed in a recess (12) formed in the body (6) such that the LED10is positioned on the longitudinal axis Z of the lens assembly (4). A convex lens (14) is formed in the aperture (12). The outer surface (16) of the lens assembly (4) comprises a plurality of flat surfaces in concentric rings that form a plurality of optical steps (18). The length of the respective steps increases towards the base (7) of the body (6). A central dimple (20) is disposed on axis Z. The dimple (20) prevents a black spot appearing when the lens assembly (4) is viewed along axis Z.

REFERENCES:
patent: 2215900 (1940-09-01), Bitner
patent: 5704709 (1998-01-01), Zwick et al.
patent: 6402347 (2002-06-01), Maas et al.
patent: 7489453 (2009-02-01), Chinniah et al.
patent: 2002/0080615 (2002-06-01), Marshall et al.
patent: 2003/0137838 (2003-07-01), Rizkin et al.
patent: 2006/0028829 (2006-02-01), Amano et al.
patent: 1688029 (2005-10-01), None
patent: 2391702 (2004-02-01), None
patent: 2003035883 (2003-02-01), None
English Abstract provided for JP-2003035883.

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