Real-time Fourier transformer using one acousto-optical cell

Details Real-time Fourier transformer using one acousto-optical cell Real-time Fourier transformer using one acousto-optical cell

1983-04-27

1985-07-23

Smith, Jerry

Boots, shoes, and leggings

364822, 35016212, 350320, 350358, G06G 719, G02F 111

Patent

active

045311960

ABSTRACT:
An optical Fourier transformer comprising a laser which is modulated by the signal to be analyzed, a beam splitter for dividing the beam into two beams which are directed by optical means to opposite sides of a Bragg cell with the corresponding rays in the two beams striking opposite ends of the Bragg cell. A chirp signal impressed upon the Bragg cell causes each of the beams incident thereon to produce a diffracted beam. The diffracted beams are recombined by optical means with the corresponding rays becoming coincident and the recombined beams are directed to a time-integrating photo-detector array. The distribution of intensities on the array is related to the Fourier transform.

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J. N. Lee et al., "Discrete Fourier Transformation Using a Time-Integrati Acousto-Optical signal Transformer", Applied Physics Letters, vol. 41, pp. 131-132, Jul. 15, 1982.
N. N. Lee et al., "New Acousto-Optical Devices for Fourier Transformation", SPIE Proceedings--vol. 341, Real Time Signal Processing V. pp. 86-93, 1982 Pub. Feb. 1983.

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