Efficient light diffuser

Details Efficient light diffuser Efficient light diffuser

1977-04-11

1979-02-20

Wintercorn, Richard A.

Plastic and nonmetallic article shaping or treating: processes

Outside of mold sintering or vitrifying of shaped inorganic...

Including plural heating steps

264 24, 264108, 350168, 428402, G03B 2160, B29D 302

Patent

active

041403690

ABSTRACT:
A process for making a new type of diffuser is described wherein an electric field is applied to a liquid containing a suspension of transparent platelets having a refractive index higher than that of the fluid and a different dielectric constant. The field causes the planes of the platelets to be aligned substantially parallel to that of the field but to have random angular orientation with respect to the direction of the field. While the platelets are thus aligned, the liquid is hardened to permanently retain the platelets in the aligned position even in the absence of the electric field. The resulting structure produces good diffusion of light with a high ratio of transmitted to reflected light.

REFERENCES:
patent: 2584441 (1952-02-01), Fredendall
patent: 2953819 (1960-09-01), Holoubek et al.
patent: 3010158 (1961-11-01), Broderson
patent: 3507938 (1970-04-01), Hundsdiecker
patent: 3626041 (1971-12-01), Fields et al.
patent: 3679451 (1972-07-01), Marks et al.

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