Parameter l is the wavelength of emission light. In various cases of reconstruction of depreciated display image it is satisfactory to know PSF as an abstract approximation of the original PSF, but in some other cases, as the aberrance and others anomalies of individually used lenses bring about cancellation of image, that we cannot abolish by present approximation, it is necessary to obtain PSF by an empirical manner. We can define PSF as a transformation of a light emitting point, whose magnitude is smaller than resolution of the optical system, so we chose a point light source for examined object. Measuring out these image parameters yields PSF, that itself more approaches to original. At factual conditions the light emitting point appears as a circular aggregation of light spots, with fading intensity depending on the radius.
Circular aggregation increases in radius with clearance of in-focus plains.
Empirical PSF 4. Future work Work presented in this paper provides compact tool for processing of image obtained via CCD camera connected to optical devices. Algorithms use either theoretical or empirically measured approximation of point spread function. Merely small number of physical parameters is considered in existing models of point spread function. Considering more parameters there appears the possibility of more accurate modeling of point spread function for individual optical systems.