Drift-compensated and intensity-averaged laser-based system uses optical and photoelectric effects for precise measurement of small thermally-induced size changes. Final output signal is directly proportional to size of sample shadow and independent of laser intensity, detector dark current, and lateral motion of sample.
Laser extensometer
NASA Tech Briefs ; 1 , 1
1976-03-01
Miscellaneous
No indication
English
NTRS | 1969
|NTRS | 1986
|Schenck autographic extensometer
Engineering Index Backfile | 1933
|Laser Extensometer for Noncontact Measurement of Strain
Online Contents | 1997
Creep Measurement Video Extensometer
NTRS | 2011
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