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Title: AO Group Annual Report

Abstract

The Adaptive Optics (AO) Group in I Division develops and tests a broad range of advanced wavefront control technologies. Current applications focus on: Remote sensing, High power lasers, Astronomy, and Human vision. In the area of remote sensing, the AO Group leads a collaborative effort with LLNL's Nonproliferation, Arms Control & International Security (NAI) Directorate on Enhanced Surveillance Imaging. The ability to detect and identify individual people or vehicles from long-range is an important requirement for proliferation detection and homeland security. High-resolution imaging along horizontal paths through the atmosphere is limited by turbulence, which blurs and distorts the image. For ranges over {approx}one km, visible image resolution can be reduced by over an order of magnitude. We have developed an approach based on speckle imaging that can correct the turbulence-induced blurring and provide high resolution imagery. The system records a series of short exposure images which freeze the atmospheric effects. We can then estimate the image magnitude and phase using a bispectral estimation algorithm which cancels the atmospheric effects while maintaining object information at the diffraction limit of the imaging system.

Authors:
Publication Date:
Research Org.:
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
889452
Report Number(s):
UCRL-TR-217011
TRN: US200619%%574
DOE Contract Number:  
W-7405-ENG-48
Resource Type:
Technical Report
Country of Publication:
United States
Language:
English
Subject:
98 NUCLEAR DISARMAMENT, SAFEGUARDS, AND PHYSICAL PROTECTION; 71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; ALGORITHMS; ARMS CONTROL; ASTRONOMY; DETECTION; DIFFRACTION; LASERS; OPTICS; PROLIFERATION; REMOTE SENSING; RESOLUTION; SECURITY; TURBULENCE; VISION

Citation Formats

Olivier, S. AO Group Annual Report. United States: N. p., 2005. Web. doi:10.2172/889452.
Olivier, S. AO Group Annual Report. United States. https://doi.org/10.2172/889452
Olivier, S. 2005. "AO Group Annual Report". United States. https://doi.org/10.2172/889452. https://www.osti.gov/servlets/purl/889452.
@article{osti_889452,
title = {AO Group Annual Report},
author = {Olivier, S},
abstractNote = {The Adaptive Optics (AO) Group in I Division develops and tests a broad range of advanced wavefront control technologies. Current applications focus on: Remote sensing, High power lasers, Astronomy, and Human vision. In the area of remote sensing, the AO Group leads a collaborative effort with LLNL's Nonproliferation, Arms Control & International Security (NAI) Directorate on Enhanced Surveillance Imaging. The ability to detect and identify individual people or vehicles from long-range is an important requirement for proliferation detection and homeland security. High-resolution imaging along horizontal paths through the atmosphere is limited by turbulence, which blurs and distorts the image. For ranges over {approx}one km, visible image resolution can be reduced by over an order of magnitude. We have developed an approach based on speckle imaging that can correct the turbulence-induced blurring and provide high resolution imagery. The system records a series of short exposure images which freeze the atmospheric effects. We can then estimate the image magnitude and phase using a bispectral estimation algorithm which cancels the atmospheric effects while maintaining object information at the diffraction limit of the imaging system.},
doi = {10.2172/889452},
url = {https://www.osti.gov/biblio/889452}, journal = {},
number = ,
volume = ,
place = {United States},
year = {Tue Oct 04 00:00:00 EDT 2005},
month = {Tue Oct 04 00:00:00 EDT 2005}
}