D. Zalvidea et al., Quality parameters analysis of optical imaging systems with enhanced focaldepth using the Wigner distribution function, J OPT SOC A, 17(5), 2000, pp. 867-873
An analysis of the Strehl ratio and the optical transfer function as imagin
g quality parameters of optical elements with enhanced focal length is carr
ied out by employing the Wigner distribution function. To this end, we use
four different pupil functions: a full circular aperature, a hyper-Gaussian
aperature, a quartic phase plate, and a logarithmic phase mask. A comparis
on is performed between the qualty parameters and test images formed by the
se pupil functions at different defocus distances. [SO740-3232(00)00605-0].