A digital filter for optimal enhancement of Fabry-Perot interferograms

Details A digital filter for optimal enhancement of Fabry-Perot interferograms A digital filter for optimal enhancement of Fabry-Perot interferograms

Jun 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988ap%26ss.145..171p&link_type=abstract

Astrophysics and Space Science (ISSN 0004-640X), vol. 145, no. 1, June 1988, p. 171-175. Research supported by the Department of

Astronomy and Astrophysics

Astrophysics

Digital Filters, Fabry-Perot Interferometers, H Alpha Line, Halley'S Comet, High Pass Filters, Diffraction Patterns, Velocity Distribution

Scientific paper

The theory and performance of a high-pass digital filter for enhancing faint Fabry-Perot interferograms are considered. The filters involve the subtraction of low-pass median images (representing all of the lowest-spatial-frequency structural information of the interferogram) from the unprocessed image. The technique is shown to successfully reveal the distortions and splits in interferogram fringes of Comet Halley obtained in the 6563-A (H-alpha) line emission.

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