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The determination of the direction of the optic axis of uniaxial crystalline materialsThe birefringence of crystalline substances in general, and of sapphire in particular, is described. A test is described whose purpose is to determine the direction of the optic axis of a cylindrically machined single crystal of sapphire. This test was performed on the NASA Lewis sapphire cylinder and it was found that the optic axis made an angle of 18 deg with the axis of symmetry of the cylinder.
Document ID
19860013444
Acquisition Source
Legacy CDMS
Document Type
Technical Memorandum (TM)
Authors
Lock, J. A. (Cleveland State Univ. Ohio, United States)
Schock, H. J. (NASA Lewis Research Center Cleveland, OH, United States)
Regan, C. A. (NASA Lewis Research Center Cleveland, OH, United States)
Date Acquired
September 5, 2013
Publication Date
April 1, 1986
Subject Category
Instrumentation And Photography
Report/Patent Number
NAS 1.15:86892
NASA-TM-86892
E-2364
Report Number: NAS 1.15:86892
Report Number: NASA-TM-86892
Report Number: E-2364
Accession Number
86N22915
Funding Number(s)
PROJECT: RTOP 505-40-68
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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