A generalized polychromatic point spread function applicable to optical imaging systems under broadband illumination is derived. The combined wavelength-dependent function, i.e., the product of the object radiance, medium transmittance, and detector response, is characterized by two parameters, the mean and standard deviation.
Harbans S. Dhadwal,
Jeffrey Hantgan,
"Generalized Point Spread Function For A Diffraction-Limited Aberration-Free Imaging System Under Polychromatic Illumination," Optical Engineering 28(11), 281237 (1 November 1989). https://doi.org/10.1117/12.7977125
Harbans S. Dhadwal, Jeffrey Hantgan, "Generalized Point Spread Function For A Diffraction-Limited Aberration-Free Imaging System Under Polychromatic Illumination," Opt. Eng. 28(11) 281237 (1 November 1989)