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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Vol. 17, Iss. 8 — Apr. 15, 1978
  • pp: 1194–1198

Bandpass filtering of moving-object laser heterodyne-signals by finite apertures

J. Carl Leader  »View Author Affiliations


Applied Optics, Vol. 17, Issue 8, pp. 1194-1198 (1978)
http://dx.doi.org/10.1364/AO.17.001194


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Abstract

Expressions for the frequency power spectral density and power spectral density SNR of a heterodyne detection system are derived assuming the signal radiation field results from a laser illuminated, moving rough object. The calculated spectral density is attenuated at large spectral spread frequencies (resulting from target rotation) by averaging of the high spatial frequency speckle pattern by the finite extent (aperture) of the local oscillator field. Optimum signal detection is obtained only at the Doppler shifted frequency. Spatial anisotropy of the radiation field mutual coherence function precludes exact calculations for arbitrary local oscillator field distributions.

© 1978 Optical Society of America

History
Original Manuscript: September 9, 1977
Published: April 15, 1978

Citation
J. Carl Leader, "Bandpass filtering of moving-object laser heterodyne-signals by finite apertures," Appl. Opt. 17, 1194-1198 (1978)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-17-8-1194

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