Device for directly influencing the thermal exchanges in cuvets traversed by optical rays or beams

摘要

The device for directly influencing the thermal conditions in cuvettes, in particular Raman cuvettes, traversed by optical rays or beams, for example, laser rays of a particular frequency, comprising a gas exchange circuit with a flow conveyed perpendicularly to the path of the rays in the cuvette by means of an impeller, a jet nozzle and a diffuser, the gas exchange jet (S) being aligned with regions of locally increased heating in the cuvette (4) by concentrating the jet on said regions or by accelerating the jet in said regions, for example by means of moveable or adjustable jet guidance walls (21a, 21b; 23a, 23b) of the nozzle (5) or of the diffuser (6).