Speckle correlation method used to detect an object's surface slope
We present a technique employing a speckle pattern correlation method for detection of the slope of an object's surface. Controlled translation of an object under investigation and numerical correlation of speckle patterns recorded during its motion give information used to evaluate the tilt of the object. The proposed optical setup uses a symmetrical arrangement of detection planes in the image field and enables one to detect the tilt of an object's surface within the interval(10 deg. -30 deg. ). Simulation analysis shows how to control the measuring range. The presented theory, simulation analysis, and setup are verified through an experiment by measurement of the slope of a surface of a cube made out of steel.
- OSTI ID:
- 20853569
- Journal Information:
- Applied Optics, Journal Name: Applied Optics Journal Issue: 27 Vol. 45; ISSN 0003-6935; ISSN APOPAI
- Country of Publication:
- United States
- Language:
- English
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