Expensive optical-grade components in holographic interferometer are replaced with plastic test section and large-aperture spherical mirror to reduce distortions introduced by imperfections and cylindrical shape of plastic. Instrument is used for shock-tube gas density studies and is adaptable to wind-tunnel studies of vehicle windshields and other testing.
Double-exposure holographic interferometer
NASA Tech Briefs ; 1 , 2
1976-08-01
Miscellaneous
No indication
English
Holographic Twyman-Green Interferometer
NTRS | 1984
|Four-grating holographic interferometer [2108-80]
British Library Conference Proceedings | 1993
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