Design and fabrication of an ultraviolet-visible coded aperture snapshot spectral imager

David S. Kittle, Daniel L. Marks, David J. Brady

Research output: Contribution to journalArticlepeer-review

20 Scopus citations

Abstract

We describe the design and performance of a coded aperture spectral imager with a wide spectral range of 320 to 700nm over 87 channels and 1988-by-1988 pixels of spatial resolution. A custom-designed relay lens was designed and built for the system, including a dispersive prism element in the collimated space of the relay lens. The optical design process, prescription, and performance are reported for the entire system, including calibration and alignment. Simulations of high-resolution spectral images are conducted to verify the reconstruction algorithm and relative resolution of the instrument compared to ground truth data. Measured data were taken with the instrument using both a random coded aperture and standard slit for spatial resolution comparisons. Finally, reconstructed spectral images from the instrument are presented of a sunlight-illuminated flower from 360 to 700nm.

Original languageEnglish (US)
Article number071403
JournalOptical Engineering
Volume51
Issue number7
DOIs
StatePublished - Jul 2012
Externally publishedYes

Keywords

  • hyperspectral imaging
  • image reconstruction
  • multispectral imaging
  • optical design
  • optical engineering
  • remote sensing
  • ultraviolet

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics
  • Engineering(all)

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