Optical diffusers obtained by fluid phase mixing of incompatible

Details Optical diffusers obtained by fluid phase mixing of incompatible Optical diffusers obtained by fluid phase mixing of incompatible

1997-11-03

1999-08-03

Vargot, Matthieu D.

Stock material or miscellaneous articles

Web or sheet containing structurally defined element or...

Including a second component containing structurally defined...

264 11, 264 16, 264 27, 264 138, 359452, 359599, B29D 1100, G02B 502

Patent

active

059323426

ABSTRACT:
A process for producing a light diffusing sheet material, and materials made therefrom. A dispersion of light scattering optically clear particles in an optically clear matrix during mixing of the constituent components of the diffuser in the liquid phase and then forming a film or sheet by, e.g., extrusion or casting, from which a screen suitable for displaying images projected thereupon may be constructed. The respective light dispersing and matrix components are chosen by their respective viscosities, interfacial surface energies, and refractive index differential. In an embodiment, it has been found that when the viscosity ratio of first (matrix) optically clear material to second (light dispersing) optically clear is between 0.05 and 10, the first optically clear material disperses or breaks the second optically clear material up into particles of a desired diameter during mixing or mastication of the two optically clear materials while in the fluid phase.

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