Holographic light guide

Details Holographic light guide Holographic light guide

G - Physics

02

F

88/97

G02F 1/035 (2006.01) G02B 5/32 (2006.01) G02B 6/12 (2006.01) G02F 1/295 (2006.01)

Patent

CA 1179878

ABSTRACT OF THE DISCLOSURE A holographic light guide comprising, in sequence, a substrate, a light guiding layer and a holographic record- ing layer that partially replaces the light guiding layer is disclosed. The substrate is made of a first bismuth sillenite group substance. The light guiding layer is made of a second bismuth sillenite group substance that has a higher refractive index than the first bismuth sillenite group substance and absorbs little of the light being guided. The holographic recording layer is made of a third bismuth sillenite group substance that has a higher refractive index than the first bismuth sillenite group substance and has a degree of photo- sensitivity.

411847

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