抄録
Imaging characteristics of lens with random fluctuation of complex transmittance in the pupil are studied by response function and noise theory.
Random fluctuation of light (optical noise) is classified as follows: optical noise
according to the condition of illumination.
Callier Q-factor is investigated with the idea of amplitude noise. The relation between Q-factor and granularity is discussed.
Phase noise is mainly treated in the applications because of its distinctive features on no loss in the amount of light and on the capability of perfect cut-off characteristics in response function. Response function of the combined system with phase noise filter and aberration-free lens could be designed by some factors concerning the random fluctuation of phase just as one wishes.
Applications of the phase noise, on the filtering of periodic structure as screen dots or as scanning lines in TV, on the removing of moire in the rescreening and on the soft focus effect in portrait photography, are illustrated.
