Retroreflective device comprising gradient index lenses

Details Retroreflective device comprising gradient index lenses Retroreflective device comprising gradient index lenses

2007-01-30

2007-01-30

Schwartz, Jordan M. (Department: 2873)

Optical: systems and elements

Lens

With graded refractive index

C359S727000, C359S732000

Reexamination Certificate

active

10516370

ABSTRACT:
A retroreflective device comprising a substantially spherical graded refractive index lens, referred to as a GRIN-sphere lens (2), a reflective part for retroreflecting (6) a radiation beam (B) passing through the graded refractive index lens and, at least partially surrounding the lens, a transparent material (4) having a substantially uniform refractive index.

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Spherical gradient-index polymer lens with spherical aberration, Yasuhiro Koike et al., Applied Optics, vol. 33, No. 16, Jun. 1, 1994, pp. 3394-3400.
IPER dated Sep. 13, 2005 re PCT/GB2004/003652.

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