Temperature measurement in laminar free convective flow using digital holography
Applied Optics, Vol. 48, Issue 10, pp. 1869-1877 (2009)
http://dx.doi.org/10.1364/AO.48.001869
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Abstract
A method for measurement of temperature in laminar free convection flow of water is presented using digital holographic interferometry. The method is relatively simple and fast because the method uses lensless Fourier transform digital holography, for which the reconstruction algorithm is simple and fast, and also the method does not require use of any extra experimental efforts as in phase shifting. The quantitative unwrapped phase difference is calculated experimentally from two digital holograms recorded in two different states of water—one in the quiescent state, the other in the laminar free convection. Unknown temperature in laminar free convection is measured quantitatively using a known value of temperature in the quiescent state from the unwrapped phase difference, where the equation by Tilton and Taylor describing the variation of refractive index of water with temperature is used to connect the phase with temperature. Experiments are also performed to visualize the turbulent free convection flow.
© 2009 Optical Society of America
OCIS Codes
(090.1760) Holography : Computer holography
(090.2880) Holography : Holographic interferometry
(100.2000) Image processing : Digital image processing
(120.2880) Instrumentation, measurement, and metrology : Holographic interferometry
(090.1995) Holography : Digital holography
ToC Category:
Holography
History
Original Manuscript: October 21, 2008
Revised Manuscript: February 5, 2009
Manuscript Accepted: February 20, 2009
Published: March 24, 2009
Citation
Md. Mosarraf Hossain and Chandra Shakher, "Temperature measurement in laminar free convective flow using digital holography," Appl. Opt. 48, 1869-1877 (2009)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-48-10-1869
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