Detection Processes for Wavefront Reconstruction Receivers.
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)
Document Details
- Document Type
- Technical Report
- Publication Date
- Jul 01, 1967
- Accession Number
- AD0843747
Entities
People
- J. W. Goodman
- M. Lehmann
Organizations
- Stanford University