Laboratory demonstration of image reconstruction for coherent optical system of modular imaging collectors (COSMIC)

Details Laboratory demonstration of image reconstruction for coherent optical system of modular imaging collectors (COSMIC) Laboratory demonstration of image reconstruction for coherent optical system of modular imaging collectors (COSMIC)

Jan 1984

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984spie..440..143t&link_type=abstract

IN: Synthetic aperture systems; Proceedings of the Meeting, San Diego, CA, August 25, 26, 1983 (A85-22710 09-74). Bellingham, WA

Physics

Optics

Coherent Light, Image Reconstruction, Telescopes, Apertures, Autocorrelation, Digital Data, Fourier Transformation

Scientific paper

The first physical demonstration of the principle of image reconstruction using a set of images from a diffraction-blurred elongated aperture is reported. This is an optical validation of previous theoretical and numerical simulations of the COSMIC telescope array (coherent optical system of modular imaging collectors). The present experiment utilizes 17 diffraction blurred exposures of a laboratory light source, as imaged by a lens covered by a narrow-slit aperture; the aperture is rotated 10 degrees between each exposure. The images are recorded in digitized form by a CCD camera, Fourier transformed, numerically filtered, and added; the sum is then filtered and inverse Fourier transformed to form the final image. The image reconstruction process is found to be stable with respect to uncertainties in values of all physical parameters such as effective wavelength, rotation angle, pointing jitter, and aperture shape. Future experiments will explore the effects of low counting rates, autoguiding on the image, various aperture configurations, and separated optics.

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