Intensity Masking to Get High Resolution Images from Low Quality Apertures

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The effort and expense required to build and maintain an optical-quality telescope increases dramatically with the size of the telescope aperture, and this is especially so in space. But scenarios have been proposed for deploying (for instance, inflatable) telescopes with very large but considerably lecithin optical-quality apertures. Our interest is in ameliorating the effects of the low quality aperture in order to exploit the raw size of the aperture to obtain high resolution images. We describe an algorithm for generating an adaptive binary mask to correct the time-varying aberrations of very large apertures which are many (possibly hundreds of) wavelengths ... continued below

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14 p.

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Theiler, J.P., Priedhorsky, W.C. December 31, 1997.

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The effort and expense required to build and maintain an optical-quality telescope increases dramatically with the size of the telescope aperture, and this is especially so in space. But scenarios have been proposed for deploying (for instance, inflatable) telescopes with very large but considerably lecithin optical-quality apertures. Our interest is in ameliorating the effects of the low quality aperture in order to exploit the raw size of the aperture to obtain high resolution images. We describe an algorithm for generating an adaptive binary mask to correct the time-varying aberrations of very large apertures which are many (possibly hundreds of) wavelengths out of figure. The technique is limited to monochromatic imagery, though the wavelength at which observations are taken can be readily changed on the fly, and for earth-pointing applications, the limited light-gathering power imposed by the monochromatic filter is not a problem. The mask itself can be placed at the exit pupil of the telescope, which permits implementation on a large scale. A similar approach, in which the pixels of the mask are half-wave phase shifters instead of opaque optical elements, was described by Love et al.

Physical Description

14 p.

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OSTI as DE98000619

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  • Annual meeting of the Society of Photo-Optical Instrumentation Engineers, San Diego, CA (United States), 27 Jul - 1 Aug 1997

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  • Other: DE98000619
  • Report No.: LA-UR--97-2670
  • Report No.: CONF-970706--
  • Grant Number: W-7405-ENG-36
  • Office of Scientific & Technical Information Report Number: 618162
  • Archival Resource Key: ark:/67531/metadc691257

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  • December 31, 1997

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  • Aug. 14, 2015, 8:43 a.m.

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  • Feb. 29, 2016, 3:33 p.m.

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Theiler, J.P., Priedhorsky, W.C. Intensity Masking to Get High Resolution Images from Low Quality Apertures, article, December 31, 1997; New Mexico. (digital.library.unt.edu/ark:/67531/metadc691257/: accessed August 19, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.