Binary phase elements: optical and statistical properties
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Shovgenyk M.V., Krokhmalskii T.Ye., Kozlovskii M.P.
The optical properties of binary phase elements (BPE) are described
by using the method of coordinate-frequency distribution of signals. The
analytical expressions for the autocorrelation function and the Wiener
spectrum of the BPE spatial frequencies are obtained. On their basis the
generalized optical parameter for a quantitative estimation of the level
of optical noise and the fluctuation of the intensity of the Wiener spectrum
interference is calculated. A statistical description of the phase elements
is suggested, on the basis of wich the parameter of non-orthogonality is
introduced. It characterizes the binary phase distribution for the classes
of orthogonal, quasi-orthogonal and random phase elements. A diagram representation
(optical parameter vs non-orthogonality parameter) for the description
of the classes of orthogonal, quasi-orthogonal and random phase elements
is introduced.
Key words: image processing, phase masks, signal/noise ratio
doi 10.3116/16091833/2/1/1/2001 |