Composite lens structure

Optical: systems and elements – Single channel simultaneously to or from plural channels – By surface composed of lenticular elements

Reexamination Certificate

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Details

C359S455000

Reexamination Certificate

active

07656584

ABSTRACT:
A composite lens structure is disclosed. The composite lens structure includes a diffusion plate and an optical structure formed on the diffusion plate. The optical structure includes a plurality of convex portions arranged in a 2-D matrix along a first direction and a second direction and a plurality of concave portions arranged in a 2-D matrix also along the first direction and the second direction. Each convex portion adjacent to a plurality of concave portions includes a low curvature portion and a high curvature portion higher than the low curvature portion. Each concave portion adjacent to a plurality of convex portions includes a low curvature portion and a high curvature portion lower than the low curvature portion. The convex portions, the concave portions and each junction of the convex portion and the concave portion have a curvature different from 0.

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patent: 2004/0061944 (2004-04-01), Kashima et al.
patent: 2005/0007793 (2005-01-01), Yoshida et al.
patent: 2006/0250707 (2006-11-01), Whitney et al.
patent: 2006/0256582 (2006-11-01), Chuang
patent: 2004126016 (2004-04-01), None

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