LIGHTING DEVICE Russian patent published in 2023 - IPC G02B17/00 G01N21/55 

FIELD: spatial distribution measuring.

SUBSTANCE: invention relates to the field of measuring the spatial distribution of the brightness characteristics of samples, in particular a road asphalt concrete pavement, of a rectangular shape in laboratory conditions on a stationary installation at short photometric distances, illuminated by a collimated light beam incident on the test sample at certain fixed angles, and at different viewing angles. The claimed device contains a light source placed in the housing, and a glass mirror reflector fixed with the possibility of regulation on a rotatable arc, one of the ends of which is movably connected to the limb. At the same time, a rectangular fragment of a glass paraboloidal mirror reflector is used as a glass mirror reflector, and the light source is placed at the focus of a rectangular fragment of a glass paraboloidal mirror reflector. To form a light beam, a rectangular hole is made in the light source body, displaced relative to the center of the LED, which limits the size of the light beam according to the size of a fragment of a glass paraboloid mirror reflector.

EFFECT: ensuring uniform illumination over the entire surface of a rectangular sample by obtaining a collimated light beam while minimizing side illumination and minimal screening of the sample when changing the angle of illumination and increasing the compactness of the structure as a whole.

3 cl, 4 dwg