What are the advantages of beamsplitter detectors?
In a beamsplitter detector the IR radiation is entering one aperture window and is divided internally by a beamsplitter in two or four parts. Due to the single aperture only a 2.5mm area needs to be illuminated and thus smaller gas cells with a small gas volume can be used. Additionally, the signal ratio of all channels in the detector is stable, independent from aging, mechanical shift or pollution because a partial illumination of the entrance aperture effects all channels similarly.
