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Special Section on Computational Imaging

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

[+] Author Affiliations
David S. Kittle

Duke University, Fitzpatrick Institute for Photonics and Department of Electrical and Computer Engineering, 129 Hudson Hall, Durham, North Carolina 27708

Daniel L. Marks

Duke University, Fitzpatrick Institute for Photonics and Department of Electrical and Computer Engineering, 129 Hudson Hall, Durham, North Carolina 27708

David J. Brady

Duke University, Fitzpatrick Institute for Photonics and Department of Electrical and Computer Engineering, 129 Hudson Hall, Durham, North Carolina 27708

Opt. Eng. 51(7), 071403 (May 14, 2012). doi:10.1117/1.OE.51.7.071403
History: Received October 14, 2013; Revised December 27, 2011; Accepted January 4, 2012
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Abstract.  We describe the design and performance of a coded aperture spectral imager with a wide spectral range of 320 to 700 nm 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 700 nm.

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© 2012 Society of Photo-Optical Instrumentation Engineers

Citation

David S. Kittle ; Daniel L. Marks and David J. Brady
"Design and fabrication of an ultraviolet-visible coded aperture snapshot spectral imager", Opt. Eng. 51(7), 071403 (May 14, 2012). ; http://dx.doi.org/10.1117/1.OE.51.7.071403


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