Report

Stray light and the effect it has on Optical Signal to Noise ratio (S/N) falls into one of two major categories either a) random scatter from mirrors, gratings, etc. or b) directional stray light such as reflections, re-entry spectra, grating ghosts and grating generated focused stray light.

Consider first how much light there is to begin with at the primary wavelength of interest then compare it to other wavelengths that may be present as scatter.

Flux Entering the Instrument (FT):

Ses = area of the entrance slit = (hw)BT = total radiance of light entering the instrumentGA = total illuminated area of the ...