Mosaic Imager Using Wave Front Control

A wave front control system ( WFCS ) organizes the object scene into a mosaic comprised of a grid of segments and transmits each segment in a temporal sequence. The WFCS steers the light fronts emanating from each segment, one segment at a time, through a series of optical components that transmit the light fronts respectively emanating from each segment onto a digital imaging sensor. An optical recording device records each sensed segment, and the object scene is composed by assembling the recorded segments. This abstract is provided to comply with the rules requiring an abstract, and is intended to allow a searcher or other reader to quickly ascertain the subject matter of the technical disclosure. It is submitted with the understanding that it will not be used to interpret or limit the scope or meaning of the claims

Analysis of a novel display enhancement scheme

Thesis (M.S.)--University of Rochester. College of Engineering and Applied Science. Institute of Optics. This thesis was digitized by the Institute of Optics in 2014 and was determined to have lapsed into the public domain. If you are the author and have questions about the digitization of your work, please contact Kari Brick, Graduate Program Coordinator for the Institute of Optics, at [email protected]. Other contact information for the Institute is available at http://www.optics.rochester.eduDisplay enhancement is herein intended to signify the accentuation of high spatial frequency details in an image. A. Marechal and his coworkers at the Institut d'Optique, Universite de Paris, emphasized small details in photographic images by simply attenuating the low frequency components in the object spectra. Vander Lugt reviews several spatial filter techniques which would be applicable to display enhancement. This report analyzes a novel "edge sharpening" display process which was formerly proposed by Dr. John C. Heurtley, Associate Professor of Optics at the University of Rochester. The enhancement scheme utilizes heterodyne operations and low pass filters to produce, in theory, high contrast displays of certain objects. Phase and amplitude linearity and edge enhancement are major features of the resultant display. Enhancement theory is first presented for specific phase targets. Simple modifications adapt this scheme to amplitude (phase free) object displays. A demonstration which was conducted to verify enhancement theory is then described; the account explains the use of laboratory facilities for data acquisition and a digital computer for expeditious data reduction. Conclusions which pertain to the development of a practical enhancement system are presented in the final section of this report