Attenuating Laser Beams — not That Easy
This article discusses various problems which one can encounter when trying to attenuate a laser beam. Depending on the method chosen, one may suffer from
How to deal with high optical attenuation in a beam splitter
Home / How to deal with high optical attenuation in a beam splitter
You guessed it—the solution here is to balance the reference and sample beams so that the detector must discharge less light from the reference beam before measuring the sample. Beam splitters are optical devices that play a crucial role in various scientific and industrial applications. High-End Cary UV-Vis-NIR spectrophotometers continuously ensure optimal measurement conditions by measuring the reference beam, sample beam, then dark signal (i. , the detector's natural reading in absence of all light) 30 times a second using an optical chopper. Why do we measure the beam attenuation? Related to concentration of suspended particulate and dissolved materials. Depending on the method chosen, one may suffer from thermally introduced beam distortions, interference effects, spatial inhomogeneities, or unwanted beam offsets.
