Application of the cepstrum method for processing iridology television signals

The questions of the cepstrum method application for the processing of iridology television signals are considered. A cepstrum method for processing a delayed video signal of an aerospace television system is proposed. The application of the method greatly facilitates the determination of the delay and expands the dynamic range of the corrected signal. An expression for determining the power cepstrum at different apertures of the reading beam is received and a suboptimal model of an ideal corrector is designed. Keywords aperture correction; digital correction; linear and nonlinear correctors; cepstrum method; aperture; Gaussian aperture; exponential aperture; signal power cepstrum

Transient interference gratings and holograms in dyed plastic

Transient diffraction gratings were holographically made in dyed plastic by absorbing laser light. Mean energy values of 40 mJ/cm2 absorbed in a 3-mm thick layer were needed to make gratings that lasted about 10 s. The writing beams and a reading one of different wavelength were simultaneously made to fall on the plastic: the reading beam was diffracted by the grating, which produced transient diffracted beams of sufficient intensity to be seen by the naked eye or to be stored permanently by conventional photographic methods. Curves showing diffraction efficiency versus exposure with grating frequency as a parameter are presented. Applications to real-time single and double exposure holography are also discussed.