Accession Number : ADA527822


Title :   Statistical Image Recovery From Laser Speckle Patterns With Polarization Diversity


Descriptive Note : Doctoral thesis


Corporate Author : AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH SCHOOL OF ENGINEERING


Personal Author(s) : Dixon, Donald B


Full Text : http://www.dtic.mil/dtic/tr/fulltext/u2/a527822.pdf


Report Date : Sep 2010


Pagination or Media Count : 156


Abstract : This research extends the theory and understanding of the laser speckle imaging technique. This non-traditional imaging technique may be employed to improve space situational awareness and image deep space objects from a ground-based sensor system. The use of this technique is motivated by the ability to overcome aperture size limitations and the distortion effects from Earth?s atmosphere. Laser speckle imaging is a lensless, coherent method for forming two-dimensional images from their autocorrelation functions. Phase retrieval from autocorrelation data is an ill-posed problem where multiple solutions exist. This research introduces polarization diversity as a method for obtaining additional information so the structure of the object being reconstructed can be improved. Results show that in some cases the images restored using polarization diversity are superior to those reconstructed without it.


Descriptors :   *LASERS , *IMAGES , DETECTORS , SIZES(DIMENSIONS) , TWO DIMENSIONAL , STATISTICS , COHERENCE , AUTOCORRELATION , THESES , OPTICAL IMAGES , PHASE , SOLUTIONS(GENERAL) , LIMITATIONS , PATTERNS , GROUND BASED , APERTURES , DEEP SPACE , SPACE OBJECTS , ATMOSPHERES , AWARENESS , FUNCTIONS(MATHEMATICS) , SPECULAR REFLECTION , DIVERSITY RECEPTION , POLARIZATION , RECOVERY


Subject Categories : Lasers and Masers
      Optics


Distribution Statement : APPROVED FOR PUBLIC RELEASE