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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Editor: James C. Wyant
  • Vol. 47, Iss. 4 — Feb. 1, 2008
  • pp: A7–A12

Infrared holography using a microbolometer array

Nicholas George, Kedar Khare, and Wanli Chi  »View Author Affiliations


Applied Optics, Vol. 47, Issue 4, pp. A7-A12 (2008)
http://dx.doi.org/10.1364/AO.47.0000A7


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Abstract

We describe a series of experiments to demonstrate holography at far-infrared wavelengths using an uncooled microbolometer array. Simple interference patterns and Fresnel zone holograms are recorded with a 10 W c w CO 2 laser illumination in a Mach–Zehnder interferometer setup. A sparse-sampling method is used to sample the hologram at a rate dependent on the bandwidth of the object wavefront rather than the carrier frequency. The samples are then used to reconstruct the complex object wavefront in the hologram plane, which is Fresnel backpropagated for image reconstruction. Uncooled microbolometer arrays are most commonly used in passive mode to image the thermal–blackbody radiation. Their technology has matured to include the wavelength range of far-infrared to submillimeter radiation. The use of microbolometers with active illumination for holography, as described in this paper, suggests their interesting future applications.

© 2008 Optical Society of America

OCIS Codes
(090.0090) Holography : Holography
(100.2650) Image processing : Fringe analysis
(100.3010) Image processing : Image reconstruction techniques
(100.5070) Image processing : Phase retrieval
(260.3160) Physical optics : Interference

History
Original Manuscript: April 26, 2007
Revised Manuscript: July 14, 2007
Manuscript Accepted: July 20, 2007
Published: September 4, 2007

Citation
Nicholas George, Kedar Khare, and Wanli Chi, "Infrared holography using a microbolometer array," Appl. Opt. 47, A7-A12 (2008)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-47-4-A7


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