NASA NTRS · 19700000281
Noncontacting-optical-strain device
Abstract
Noncontacting-strain-measuring gauge and extensometer remotely measures the mechanical displacement along the entire length of a test specimen. Measurement is accomplished by continuous scanning of a reflected light from reflective bench markings or stripes previously affixed to the specimen.
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Silver, R. H.. 1970-08-01. Noncontacting-optical-strain device. https://ntrs.nasa.gov/citations/19700000281
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