Accession Number:

ADA463586

Title:

Phase Diversity and Polarization Augmented Techniques for Active Imaging

Descriptive Note:

Doctoral thesis

Corporate Author:

AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH

Personal Author(s):

Report Date:

2007-03-01

Pagination or Media Count:

213.0

Abstract:

A multi-frame active phase diversity imaging APDI algorithm is derived for coherent light statistics and demonstrated. In addition to conventional focal-plane and diversity-plane data, a statistical description for pupil-plane PP intensity is formed and included in the derivation. The algorithm is implemented and characterized via Monte Carlo simulation. Analysis shows that its robust, insensitive to detection noise for SNR 7, performs well for SNRs as low as 2, and that the effect of system configuration on optimal parameters is minimal. Furthermore, introduction of PP data results in a 60 better reconstruction from dynamically aberrated data than obtained using only focal-plane and diversity-plane data. Both an EM-algorithm and a lensless-APDI approach are presented for generating imagery directly from PP polarization measurements. However, both approaches are currently impractical. Suggestions for improvement are offered. Finally, the APDI algorithm is modified to use PP polarization data in place of PP intensities. An initial statistical model is offered, and suggestions for performance improvement are presented.

Subject Categories:

  • Computer Programming and Software
  • Combustion and Ignition

Distribution Statement:

APPROVED FOR PUBLIC RELEASE