Accession Number:

AD0630590

Title:

THE EFFECTS OF DIFFRACTION ON OPTICAL DISCRIMINATION,

Descriptive Note:

Corporate Author:

UTAH STATE UNIV LOGAN ELECTRO-DYNAMICS LABS

Personal Author(s):

Report Date:

1966-01-01

Pagination or Media Count:

34.0

Abstract:

This report deals with the effects of diffraction and noise on the ability of an optical system to discriminate between two known incoherent intensity distributions. For a particular model of the optical detection process, the optimum discrimination procedure is derived using the techniques of statistical decision theory. Under the assumption of high background intensity, this optimum procedure simplifies considerably and it is this simplified procedure we evaluate. In addition, we consider a reasonable sub-optimum procedure which does not require detailed knowledge of the diffraction pattern. It is shown that a useful performance criterion is the integrated square of the difference between the two diffracted intensity patterns under consideration. This quantity is evaluated numerically as a function of aperture size for various situations. Typically, it is seen that ability to discriminate drops off quite rapidly as the size of the Airy disc approaches the size of the objects referred to the image plane. Author

Subject Categories:

  • Cybernetics
  • Optics
  • Bionics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE