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Off-axis sparse aperture imaging using phase optimization techniques for application in wide-area imaging systems.

Abhijit Mahalanobis1, Mark Neifeld, Vijaya Kumar Bhagavatula

  • 1Lockheed Martin Missiles and Fire Control, Orlando, Florida 32819, USA. abhijit.mahalanobis@lmco.com

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|October 3, 2009
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Summary
This summary is machine-generated.

This study introduces a novel method using microprisms and phase-optimized micropistons to improve infrared imaging with sparse apertures. The technique effectively reduces chromatic blur, enhancing image resolution and signal-to-noise ratio for wide-area imaging systems.

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Area of Science:

  • Optical Engineering
  • Infrared Imaging Technology
  • Computational Optics

Background:

  • Sparse apertures offer efficient optical designs for wide-area imaging in astronomy and medicine.
  • Off-axis imaging at infrared wavelengths presents challenges due to chromaticity, which degrades resolution.
  • Balancing signal-to-noise ratio (SNR) and resolution is critical, as wider bandwidths improve SNR but worsen chromatic blur.

Purpose of the Study:

  • To investigate the use of sparse apertures for off-axis infrared imaging.
  • To develop a method for combating chromaticity and preserving resolution.
  • To design wide-area imaging systems with reduced hardware requirements.

Main Methods:

  • Utilizing a combination of microprisms and phase-optimized micropistons.
  • Implementing sparse aperture configurations for multi-directional imaging.
  • Validating the approach through simulations and experimental data.

Main Results:

  • Demonstrated reduction of chromatic blur across a band of wavelengths.
  • Significant improvement in the point spread function (PSF).
  • Restoration of image resolution in off-axis sparse aperture imaging.

Conclusions:

  • Phase-optimized micropistons are advantageous for off-axis sparse aperture imaging.
  • The developed method enhances image quality by mitigating chromatic aberrations.
  • This approach enables more efficient wide-area imaging systems.