Patent Number: 8,798,415

Title: Transparent diffuser for diffusing multiple wavelengths of light and method of manufacturing transparent diffuser

Abstract: A light diffuser panel for coupling to an optical element, includes a substrate with a first surface that is diffusive to a plurality of wavelengths of light and a second surface, wherein the substrate comprises a material with a refractive index n.sub.in that is greater than a refractive index n.sub.d of a medium outside of the first surface, .lamda..sub.min is a minimum wavelength of the plurality of wavelengths of light, .lamda..sub.max is a maximum wavelength of the plurality of wavelengths of light, the first surface is a diffractive grating surface with a grating period P, the grating period P is greater than .lamda..sub.max/(n.sub.d+n.sub.in), and P is smaller than .lamda..sub.min.

Inventors: Mizuyama; Yosuke (Newton, MA)

Assignee: Panasonic Corporation

International Classification: G02B 6/34 (20060101); B29D 11/00 (20060101)

Expiration Date: 8/05/12018