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Optics Express

Optics Express

  • Editor: Andrew M. Weiner
  • Vol. 21, Iss. 9 — May. 6, 2013
  • pp: 11057–11077

Mixel camera––a new push-broom camera concept for high spatial resolution keystone-free hyperspectral imaging

Gudrun Høye and Andrei Fridman  »View Author Affiliations

Optics Express, Vol. 21, Issue 9, pp. 11057-11077 (2013)

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Current high-resolution push-broom hyperspectral cameras introduce keystone errors to the captured data. Efforts to correct these errors in hardware severely limit the optical design, in particular with respect to light throughput and spatial resolution, while at the same time the residual keystone often remains large. The mixel camera solves this problem by combining a hardware component – an array of light mixing chambers – with a mathematical method that restores the hyperspectral data to its keystone-free form, based on the data that was recorded onto the sensor with large keystone. A Virtual Camera software, that was developed specifically for this purpose, was used to compare the performance of the mixel camera to traditional cameras that correct keystone in hardware. The mixel camera can collect at least four times more light than most current high-resolution hyperspectral cameras, and simulations have shown that the mixel camera will be photon-noise limited – even in bright light – with a significantly improved signal-to-noise ratio compared to traditional cameras. A prototype has been built and is being tested.

© 2013 OSA

OCIS Codes
(100.3190) Image processing : Inverse problems
(120.0280) Instrumentation, measurement, and metrology : Remote sensing and sensors
(120.6200) Instrumentation, measurement, and metrology : Spectrometers and spectroscopic instrumentation
(220.4830) Optical design and fabrication : Systems design
(300.6190) Spectroscopy : Spectrometers
(110.4234) Imaging systems : Multispectral and hyperspectral imaging

ToC Category:
Imaging Systems

Original Manuscript: February 21, 2013
Revised Manuscript: April 22, 2013
Manuscript Accepted: April 23, 2013
Published: April 29, 2013

Gudrun Høye and Andrei Fridman, "Mixel camera––a new push-broom camera concept for high spatial resolution keystone-free hyperspectral imaging," Opt. Express 21, 11057-11077 (2013)

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