For inspection and adjustment the sensitivity characteristics of the photoelectric devices (P E D) intended for star radiation registration, in laboratory practice the star imitators are used. These imitators provide reproduction of the corresponding levels of radiation of a definite spectral composition in a given dynamic range.
I. A. Vasiliev,
N. I. Kasimov,
"Spectroenergetic graduation of star imitator", Proc. SPIE 2161, CIS Selected Papers: Photometry, (31 December 1993); doi: 10.1117/12.166393; https://doi.org/10.1117/12.166393