This paper discusses the properties of a reflective-type holographic diffraction grating intended
for the output of radiation from a lightguide wedge to the screen of a liquid-crystal display.
The main parameters of the grating (the spatial frequencies of the lines and the distribution of the
reflectances of light over its surface) that provide uniform illumination of the display screen
in the green part of the spectrum are determined. The nonuniformity of the illumination of the
screen in the blue and red parts of the spectrum is estimated. Experimental samples of a
holographic diffraction grating and of a replica of it have been fabricated, and a comparison has
been made of the light flux directed into the side of a display screen in a classical version
of a lighting device and in a version based on a holographic grating.
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