Laser measurement system, for use in evaluating gas, e.g. smoke, using laser absorption spectroscopy, has transparent material window with inclined surfaces, between laser source and photosensor

摘要

Laser measurement system, for measuring a fluid component within an observation space, has at least a laser light source (19) on one side of the observation space and photosensor (20) on the other side. Between the two is at least a window of transparent material the surfaces of which are inclined relative to each other.