Phase closure with rotational shear interferometers

Details Phase closure with rotational shear interferometers Phase closure with rotational shear interferometers

Dec 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986optco..60..350r&link_type=abstract

Optics Communications (ISSN 0030-4018), vol. 60, Dec. 15, 1986, p. 350-352.

Physics

Optics

5

Astronomical Photography, Atmospheric Turbulence, Image Reconstruction, Optical Correction Procedure, Signal To Noise Ratios, Speckle Interferometry, Telescopes, Fourier Transformation, Phase Matching

Scientific paper

Two rotational shear interferometers, with the shear angle of one being twice that of the other, are employed to obtain phase closure relations and to make possible the complete reconstruction of an incoherent object through unknown aberrations. Complete image reconstruction is possible with a single exposure in which two interferograms are recorded simultaneously, and the present method is very efficient on bright sources, though reconstruction on faint sources is possible by averaging closure phasors over many exposures. It is noted that multiple path integration would require many more phase closure relations, and more than two interferometers.

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