Optical correction using fourier transform heterodyne

Bryan E. Laubscher; Robert J. Nemzek; Bradly J. Cooke; Nicholas L. Olivas; Anders M. Jorgensen; J. Allyn Smith; Nina R. Weisse-Bernstein

doi:10.1117/12.620138

23 August 2005 Optical correction using fourier transform heterodyne

Bryan E. Laubscher, Robert J. Nemzek, Bradly J. Cooke, Nicholas L. Olivas, Anders M. Jorgensen, J. Allyn Smith, Nina R. Weisse-Bernstein

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Proceedings Volume 5896, Unconventional Imaging; 58960E (2005) https://doi.org/10.1117/12.620138
Event: Optics and Photonics 2005, 2005, San Diego, California, United States

Abstract

In this paper we briefly present the theory of Fourier Transform Heterodyne (FTH), describe past verification experiments carried out, and discuss the experiment designed to use this new imaging technology to perform optical correction. FTH uses the scalar projection of a reference laser beam and a test laser beam onto a single element detector. The complex current in the detector yields the coefficient of the scalar projection. By projecting a complete orthonormal basis set of reference beams onto the test beam, the amplitude and phase of the test beam can be measured, allowing the reconstruction of the phasefront of the image. Experiments to determine this technique's applicability to optical correction and optical self-correction are continuing. Applications of this technique beyond optical correction include adaptive optics; interferometry; and active, high background, low signal imaging.

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Bryan E. Laubscher, Robert J. Nemzek, Bradly J. Cooke, Nicholas L. Olivas, Anders M. Jorgensen, J. Allyn Smith, and Nina R. Weisse-Bernstein "Optical correction using fourier transform heterodyne", Proc. SPIE 5896, Unconventional Imaging, 58960E (23 August 2005); https://doi.org/10.1117/12.620138

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KEYWORDS

Spatial light modulators

Heterodyning

Optical testing

Sensors

Optical calibration

Signal detection

Wavefronts

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