Patent · US Active

Flat light concentration device with reduced thickness

US8497422B2 · kind B2 · utility

1Cited by

5References

19Claims

0Family size

Assignee

COMMISSARIAT A L'ENERGIE ATOMIQUE ET AUX ENERGIES ALTERNATIVES · FR

Inventor

Philippe Thony · Voiron, FR

Key dates

Filing date	Mar 31, 2008
Grant date	Jul 30, 2013
Priority date	—
Expiry date	Mar 23, 2030

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T156/10

Abstract

A light concentration device includes: a plate including two principal faces and an edge between the two principal faces, a refractive index gradient existing between the two principal faces, and a diffraction grating functioning in reflection or semi-reflection that cooperates with one of the principal faces of the plate having the highest refractive index, the principal face having the lowest refractive index forming a front entry face for the light, at least one exit zone for the light being disposed on the edge.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.