Separation of the isochromatics-isopachics patterns by use of retarders in holographic photoelasticity |
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Authors: | Kjell Gåsvik |
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Institution: | 1. Modern Optics Research Group, Dept. of Physics, University of Trondheim, Norwegian Institute of Technology, N-7034 NTH, Trondheim, Norway
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Abstract: | By double passing the object beam in photoelastic-holographic interferometry, separation of the isochromatic-isopachic patterns can be achieved. The object beam must then interact with a suitable polarizing element between the first and second pass. This problem is analyzed using Jones' matrices. This analysis shows that, apart from active and passive rotators, half-wave and quarter-wave retarders can also be used as polarizing elements. Possible experimental arrangements of the method are reviewed and experimental verifications are presented. |
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