Extension of Yamaguchi's laser-speckle surface-strain-gauge method yields data on two-dimensional surface strains in times as short as fractions of second. Laser beams probe rough spot on surface of specimen before and after processing. Changes in speckle pattern of laser light reflected from spot indicative of changes in surface strains during processing. Used to monitor strains and changes in strains induced by hot-forming and subsequent cooling of steel.
Two-Dimensional Laser-Speckle Surface-Strain Gauge
NASA Tech Briefs ; 17 , 4
1992-04-01
Miscellaneous
No indication
English
Improvements in a Laser-Speckle Surface-Strain Gauge
Online Contents | 1996
Improvements In A Laser-Speckle Surface-Strain Gauge
NTRS | 1996
|More About a Laser-Speckle Surface-Strain Gauge
Online Contents | 1997
The Laser Speckle Shift Strain Measurement System
British Library Conference Proceedings | 1995
|Two-color laser speckle shift strain measurement system [2860-51]
British Library Conference Proceedings | 1996
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