FIELD: instrument making.
SUBSTANCE: liquid-crystal projection screen includes liquid-crystal material placed between two transparent plates, on which layers of transparent electroconductive material are applied on inner side. At least one scattering layer is applied onto outer side of transparent plate, through which light comes out of screen, structure also applies source of voltage connected to layers of transparent electroconductive material and arranged with the possibility to supply voltage to these layers with frequency of more than 60 Hz. Liquid-crystal material is selected so that its refraction index matches refraction index of transparent plates when voltage is not available on layers of electroconductive material, and when voltage is supplied, refraction index of liquid-crystal material changes.
EFFECT: generation of image with low contrast of speckle structure.
10 cl, 6 dwg
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