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Optics Letters

Optics Letters

| RAPID, SHORT PUBLICATIONS ON THE LATEST IN OPTICAL DISCOVERIES

  • Editor: Alan E. Willner
  • Vol. 38, Iss. 20 — Oct. 15, 2013
  • pp: 4120–4123

Development of a dual-path system for band-to-band registration of an acousto-optic tunable filter-based imaging spectrometer

Huijie Zhao, Pengwei Zhou, Ying Zhang, Ziye Wang, and Shaoguang Shi  »View Author Affiliations


Optics Letters, Vol. 38, Issue 20, pp. 4120-4123 (2013)
http://dx.doi.org/10.1364/OL.38.004120


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Abstract

Accurate band-to-band registration is crucial when an acousto-optic tunable filter (AOTF)-based imaging spectrometer is used to acquire spectral data on an unstable platform. However, it is difficult to registrate hyperspectral images accurately using traditional image registration algorithms, which will seriously affect the accurate acquisition of spectra and reduce the classification accuracy. Here we demonstrate an optical configuration that acquires the diffracted and undiffracted beam of the AOTF simultaneously. These two beams have identical geometrical optical characteristic and suffer from the same image motion caused by the platform jitter. Compared with the diffracted beam, however, the intensity of the undiffracted beam is changeless when tuning the AOTF. Therefore, the use of undiffracted beams allows accurate measurement of image motion in different bands. The experiment shows that this technique greatly improves the registration accuracy of spectral images with poor correlation and low SNR.

© 2013 Optical Society of America

OCIS Codes
(120.6200) Instrumentation, measurement, and metrology : Spectrometers and spectroscopic instrumentation
(110.4234) Imaging systems : Multispectral and hyperspectral imaging

ToC Category:
Optical Devices

History
Original Manuscript: July 29, 2013
Revised Manuscript: September 10, 2013
Manuscript Accepted: September 10, 2013
Published: October 9, 2013

Citation
Huijie Zhao, Pengwei Zhou, Ying Zhang, Ziye Wang, and Shaoguang Shi, "Development of a dual-path system for band-to-band registration of an acousto-optic tunable filter-based imaging spectrometer," Opt. Lett. 38, 4120-4123 (2013)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-38-20-4120

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