Infrared gas analysis instrument includes adjustable grating in beam path between transmitter and receiver, which can adopt differing angular positions

摘要

In the measurement cell (2) an adjustable grating (6) is inserted in the beam path (X) between transmitter (7) and receiver (8). The grid (6) is moved through an angle ( delta 1-n) so that its surface (6.1) can adopt various angular positions ( alpha 1-n) with respect to the beam path (X'').