In a typical photometry bench (light source at one, photometer under test at the other), is the geometry of the baffle critical? If so, how does one design such baffles?
EDIT. Thank you all for your answers and suggestions. I received guidance from Elsie Coetzee at NMISA but all of your references were of interest. I cannot find a supplier for the I.E.S. Practical Guide to Photometry online though.
There is also some guidance on placement of baffles from the Illuminating Engineering Society in its Practical Guide to Photometry:
Article Ies Practical Guide To Photometry
The basic role of the baffles on photometric bench is to provide protection from influence of the stray light on measurement/calibration process ie. that photometer received only the radiation from source. In the case that photometer sensitive area is relatively small and define the received flux, the shape of the baffles is not critical till it provides elimination of the stray light. In the case that photometer area is large baffles are used to define received beam size and shape in addition to stray light elimination. Some of practical recommendations could be find in listed reference in two previous answers. Also, some general text books related to photometry could be useful.
Thank you all. We designed and built the baffles, did some fine tuning once they were installed and everything is working well.
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