Simultaneous two-wavelength holographic interferometry in a superorbital expansion tube facility

McIntyre, Timothy J., Wegener, Margaret J., Bishop, Alexis I. and Rubinsztein-Dunlop, Halina (1997) Simultaneous two-wavelength holographic interferometry in a superorbital expansion tube facility. Applied Optics, 36 31: 8128-8134. doi:10.1364/AO.36.008128


Author McIntyre, Timothy J.
Wegener, Margaret J.
Bishop, Alexis I.
Rubinsztein-Dunlop, Halina
Title Simultaneous two-wavelength holographic interferometry in a superorbital expansion tube facility
Journal name Applied Optics   Check publisher's open access policy
ISSN 0003-6935
Publication date 1997-11-01
Sub-type Article (original research)
DOI 10.1364/AO.36.008128
Volume 36
Issue 31
Start page 8128
End page 8134
Total pages 7
Place of publication Washington, D.C.
Publisher Optical Society of America
Language eng
Subject 0205 Optical Physics
Abstract A new variation of holographic interferometry has been utilized to perform simultaneous two-wavelength measurements, allowing quantitative analysis of the heavy particle and electron densities in a superorbital facility. An air test gas accelerated to 12 km/s was passed over a cylindrical model, simulating reentry conditions encountered by a space vehicle on a superorbital mission. Laser beams with two different wavelengths have been overlapped, passed through the test section, and simultaneously recorded on a single holographic plate. Reconstruction of the hologram generated two separate interferograms at different. angles from which the quantitative measurements were made. With this technique, a peak electron concentration of (5.5 +/- 0.5) x 10(23) m(-3) was found behind a bow shock on a cylinder. (C) 1997 Optical Society of America.
Keyword Optics
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Unknown

Document type: Journal Article
Sub-type: Article (original research)
Collection: School of Physical Sciences Publications
 
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Created: Tue, 14 Aug 2007, 03:01:30 EST