Lens having fresnel lens surface(s) and lighting apparatus...

Details Lens having fresnel lens surface(s) and lighting apparatus... Lens having fresnel lens surface(s) and lighting apparatus...

2007-12-04

2007-12-04

Quach-Lee, Y. My (Department: 2885)

Illumination

Plural light sources

With modifier

C362S331000

Reexamination Certificate

active

11601810

ABSTRACT:
A lens comprising a transparent member having at least two surfaces, and a Fresnel lens surface provided on each of the two surfaces of the transparent member, the transparent member including a generally plate-like shape having a first surface and a second surface opposing the first surface, the Fresnel lens surface being provided on each of the first and second surfaces of the transparent member.

REFERENCES:
patent: 3797915 (1974-03-01), Land et al.
patent: 5160192 (1992-11-01), Sugawara
patent: 5490049 (1996-02-01), Montalan et al.
patent: 5588743 (1996-12-01), Mayo et al.
patent: 6084670 (2000-07-01), Yamzaki et al.
patent: 2004/0149940 (2004-08-01), Buisker et al.
patent: DT2461233 (1976-06-01), None
patent: 2908098 (1980-09-01), None
patent: 02010394 (1990-01-01), None

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