METHOD AND APPARATUS FOR DETERMINING THE STRAY-LIGHT POINT-SPREAD FUNCTION OF AN IMAGING SYSTEM

摘要

A method (86) of determining the point-spread function (PSF) (22) of an imaging system (14) includes the steps of capturing image data (88), establishing an idealized source spot (92), establishing a functional form model (96), subtracting the captured image (130) from the estimated image equation (94) and determining a metric (104) that measures the fit of the estimated image (96) to the captured image (130). The functional form model (96) may include both diffraction and aberration (100) and stray light (98). The functional form model (96) may be optimized (102) to reduce the metric (104) to an acceptable level.