Accession Number : AD0843747

Title :   Detection Processes for Wavefront Reconstruction Receivers.

Descriptive Note : Final rept.,

Corporate Author : STANFORD UNIV CA STANFORD ELECTRONICS LABS

Personal Author(s) : Goodman, J. W. ; Lehmann, M.

Report Date : JUL 1967

Pagination or Media Count : 52

Abstract : If a hologram is to be detected photographically, it is desirable to know the amplitude transmittance vs exposure characteristic of the particular photosensitive material used. Experimentally measured transmittance-exposure curves are presented for seven different film types, the measurements having been made with both 6328A light (HeNe laser) and 6943A (ruby laser). An analysis of the effects of film nonlinearities on the reconstructed image is presented for the case of a diffuse object. Electronic detection is feasible if the object and reference subtend a small angle at the recording plane. The fundamental limitations imposed by image noise are derived for a detector consisting of an ideal array of photon-counting detectors. Effects of scan nonlinearities in scanning electronic detectors are examined. Finally, the problem of forming images digitally from electronically detected holograms is considered. (Author)

Descriptors :   *STEREOPHOTOGRAPHY), (*LASERS, (*OPTICAL IMAGES, DETECTION), WAVE PROPAGATION, ATMOSPHERIC MOTION, COHERENT RADIATION, PHOTOGRAPHIC FILM, SENSITIVITY, DETECTORS, VIDICONS, DISPLAY SYSTEMS, DIGITAL SYSTEMS.

Subject Categories : Lasers and Masers
      Holography
      Optical Detection and Detectors

Distribution Statement : APPROVED FOR PUBLIC RELEASE