Optical die with variable refractive index, adaptive of...

Details Optical die with variable refractive index, adaptive of... Optical die with variable refractive index, adaptive of...

2011-01-25

2011-01-25

Collins, Darryl J (Department: 2873)

Optical: systems and elements

Lens

With graded refractive index

C359S654000

Reexamination Certificate

active

07876504

ABSTRACT:
An optical die, which is intended to be placed in front of an optical sensor of a semiconductor component, has an optically useful zone having an optical axis and exhibiting a variable refractive index. Specifically the refractive index of the die is variable in an annular peripheral zone lying between a radius Ru enveloping the useful zone and a smaller radius Ro. The index is varies as a function of radial distance from a higher value near the smaller radius Ro to a lower value near the radius Ru. The function of the variable refractive index lies between a maximum and minimum profile.

REFERENCES:
patent: 4639094 (1987-01-01), Aono
patent: 4805997 (1989-02-01), Asahara et al.
patent: 6232590 (2001-05-01), Baek
patent: 1424570 (2004-06-01), None
European Search Report cited in Application No. 0854469, dated Jan. 27, 2009 (2 pages).

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