FIELD: x-ray spectrometry.
SUBSTANCE: device has optically polished wedge, absorbing screen,
for which possibility of displacement is provided relatively to
wedge side, two optically polished guides, mounted with possible
displacement perpendicularly to wedge side along its refracting
side. Absorbing screen is made in form of link between said guides.
In operation band of spectrum 
s
10 w, where
s and w are respectively linear coefficients of
radiation reduction in material of absorbing screen and wedge.
EFFECT: higher efficiency.
5 cl, 2 dwg
