Astronomy and Astrophysics – Astronomy
Scientific paper
May 1986
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986optco..58....4c&link_type=abstract
Optics Communications (ISSN 0030-4018), vol. 58, May 1, 1986, p. 4-10.
Astronomy and Astrophysics
Astronomy
2
Astronomy, Calibrating, Holography, Speckle Patterns, Amplitudes, Distortion, Power Spectra, Spatial Filtering
Scientific paper
It is shown how the technique of astronomical speckle holography is dependent upon the degree of isoplanicity between the object and the discrete point source. A well-calibrated measurement of the degree of correlation between two quasi-instantaneous simultaneous point source speckle patterns (separation = 2.6 arcsec) are presented to illustrate this nonisoplanatic effect as a function of the spatial frequency. This two-dimensional measurement is in qualitative agreement with previously computed models and shows a high degree of correlation at seeing-dominated frequencies with a severe attenuation (but not total loss of correlation) for frequencies approaching the diffraction limit. It is shown how such measurements may be used to reweight (calibrate) the Fourier amplitude of a speckle holographic image observed under similar seeing conditions in order to compensate for the nonisoplanatic degradation at high spatial frequencies.
Christou Julian C.
Hege Keith E.
No associations
LandOfFree
Isoplanicity measurements for calibration of speckle holography amplitudes does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Isoplanicity measurements for calibration of speckle holography amplitudes, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Isoplanicity measurements for calibration of speckle holography amplitudes will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1775737