The book, written by a recognized expert in the field of optics, offers exhaustive coverage of optical imaging and image evaluation. Imaging has been explained with unique treatment, as transfer of information from object plane to image plane, using the concept of communication where the optical system acts as a channel of communication. The effect of aberrations on imaging systems as regard to image transfer has been discussed in detail. Different techniques of image assessment and their importance have also been considered. Key Features — The book offers elegant presentation of the subject by a recognized expert in the field of optics — The question of coherence, both temporal and spatial, has been discussed from the point of linearity of signal transfer — Fourier transform has been used to analyse the optical signal, which is a function of space and time and has also been discussed in relation to time domain analysis in electronic communication