Grin type diffuser based on volume holographic material

Details Grin type diffuser based on volume holographic material Grin type diffuser based on volume holographic material

1992-03-09

1994-11-15

Lerner, Martin

Optical: systems and elements

Holographic system or element

Using a hologram as an optical element

359 22, 359 28, 359599, G02B 532, G02B 502, G02B 2748, G03H 132

Patent

active

053653548

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.

REFERENCES:
patent: 3754814 (1973-08-01), Leith
patent: 4035068 (1977-07-01), Rawson
patent: 4602843 (1986-07-01), Glaser-Inbari
patent: 5046793 (1991-09-01), Hockley et al.

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