Patent · US Expired

Grin type diffuser based on volume holographic material

US5365354A · kind A · utility

111Cited by

4References

10Claims

0Family size

Assignee

PHYSICAL OPTICS CORPORATION · US

Inventors

Tomasz Jannson · Torrance, US
David G. Pelka · Los Angeles, US
Tin M. Aye · Mission Viejo, US

Key dates

Filing date	Mar 9, 1992
Grant date	Nov 15, 1994
Priority date	—
Expiry date	Mar 9, 2012

Classification

Technology area (CPC G)Physics
CPC primaryG02B5/32
WIPO fieldOptics
WIPO sectorInstruments

Abstract

A diffuser based on a phase volume holographic medium is recorded non-holographically with speckle which define non-discontinuous and smoothly varying change in the refractive index of the medium. The diffuser scatters light traveling from an entrance surface to an exit surfaces and reflection from the diffuser is substantially limited to Fresnel reflection from the entrance and exit surfaces and light exiting the exit surface is substantially non-specular.

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