Focusing device

Details Focusing device Focusing device

2007-02-06

2007-02-06

Sugarman, Scott J. (Department: 2873)

Optical: systems and elements

Lens

With graded refractive index

C359S654000, C385S123000

Reexamination Certificate

active

10536672

ABSTRACT:
A focusing device with a refractive index profile changing from the center of the focusing device towards its perimeter, is made of a material wherein the lateral refractive index distribution of the focusing device material is homogeneous and wherein the focusing device comprises holes for introducing a graded refractive index profile. This allows accurate control of the graded refractive index profile.

REFERENCES:
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patent: 4403825 (1983-09-01), Tangonan et al.
patent: 5808806 (1998-09-01), Guhman et al.
patent: 5973316 (1999-10-01), Ebbesen et al.
patent: 6594429 (2003-07-01), White
patent: 6990282 (2006-01-01), Russell et al.
PCT Search Report, Application No. PCT/IB03/06353, dated Apr. 16, 2004.

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