Surface wave delay line acoustooptic devices for signal processing

Space–frequency conversions for image transmission and processing

“…• [1 + (1 )12 (x) + (4)4(x)] } red (x/W). (28) In this case, only the product terms (*)1 1 (x -Vt)4(x) and )1i (x -Vt)12 (x) have nominal propagation directions along , the z-axis. Thus the complex wave amplitude at the on-axis pinhole is given by…”

“…This in turn imposes constraints on that distance and on the bandwidth of the complex modulation a l (•) [14]. This kind of processor geometry has been exploited extensively by researchers at the Harry Diamond Laboratory with planar Bragg mode acousto-optic processors, typically with a second, reverse direction acoustooptic device replacing the phototransparency [28] D. Fourier-Plane Heterodyne Processing…”

Microelectromechanical delay lines with slow signal propagation

“…In delay-line oscillators, long delay stabilizes the frequency and suppresses off-carrier phase noise [7][8][9][10]. Delay-line-based information processing has been applied to implement convolution, time inversion and Fourier transforms [11][12][13]. Analog delays are also proposed for novel ultra-wideband receivers [14].…”