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Journal of the Optical Society of America A

Journal of the Optical Society of America A

| OPTICS, IMAGE SCIENCE, AND VISION

  • Vol. 17, Iss. 7 — Jul. 1, 2000
  • pp: 1256–1264

Measurement of Helmholtz wave fields

Miguel A. Alonso  »View Author Affiliations


JOSA A, Vol. 17, Issue 7, pp. 1256-1264 (2000)
http://dx.doi.org/10.1364/JOSAA.17.001256


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Abstract

A simple formalism is found for the measurement of wave fields that satisfy the Helmholtz equation in free space. This formalism turns out to be analogous to the well-known theory of measurements for quantum-mechanical wave functions: A measurement corresponds to the squared magnitude of the inner product (in a suitable Hilbert space) of the wave field and a field that is associated with the detector. The measurement can also be expressed as an overlap in phase space of a special form of the Wigner function that is tailored for Helmholtz wave fields.

© 2000 Optical Society of America

OCIS Codes
(030.1670) Coherence and statistical optics : Coherent optical effects
(030.5630) Coherence and statistical optics : Radiometry
(040.0040) Detectors : Detectors
(260.0260) Physical optics : Physical optics
(350.7420) Other areas of optics : Waves

History
Original Manuscript: August 19, 1999
Revised Manuscript: March 1, 2000
Manuscript Accepted: March 1, 2000
Published: July 1, 2000

Citation
Miguel A. Alonso, "Measurement of Helmholtz wave fields," J. Opt. Soc. Am. A 17, 1256-1264 (2000)
http://www.opticsinfobase.org/josaa/abstract.cfm?URI=josaa-17-7-1256


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References

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  12. Notice that, for example, the spectral function for the first measurement in Eq. (18b) can be written as μ(θ)=2 sin θρ(r, θ)=i2limL→0 ρ(x+L/2, z, θ)-ρ(x-L/2, z, θ)kL.The corresponding measurement is then achieved by a phase-locked pair of point detectors, aligned in the z direction with a separation much smaller than the wavelength, and with a phase mismatch of π. Notice that these two detectors are coupled (i.e., their relative weights including phase are fixed) and therefore do not belong to the class of composite detectors presented in Section 8. The remaining measurements in Eqs. (18b) and (18c) are achieved with similar detectors.
  13. See Ref. 1, pp. 221.
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  17. See Ref. 8, p. 169.

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