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An optical method for assessing surface damage

N.A. Sazonnikova, V.I. Mordasov, A.A. Shuvaev

Institute of Machine Acoustics Samara State Aerospace University

 PDF, 244 kB

Pages: 106-110.

Full text of article: Russian language.

Abstract:
The article considers a method and test equipment for using laser systems to detect surface defects such as scratches, cracks, changes in the surface condition of a workpiece as a result of chemical impact and abrasive wear. The authors develop a mathematical model of the probability of recognizing the defects based on the energy match of the sounding signal and the geometric parameters of the investigated surface area. The authors perform an experimental assessment of influence of the depth, opening angle and location of the symmetry plane of the crack on the change in the distribution of radiation intensity in the light spot during its surface reflection. The article demonstrates the advantages of using laser diodes with quantum-size structures based on the materials of quaternary systems in small-sized control and measurement systems.

Citation:
Sazonnikova NA, Mordasov VI, Shuvaev AA. An optical method for assessing surface damage. Computer Optics 2000; 20: 106 - 110.

References:

  1. Detection of surface cracks by optical scanning. Testing devices and stands: Express information. 1988; 14 (59): 1-8.
  2. Kuksa NN. Influence of the scanning aperture area of a photoelectric flaw detector on the probability of missing a defect. Defektoskopiya; 1984; 4: 57-64.
  3. Basov NG, Eliseev PG, Popov YM. Advances and problems in the physics of injection lasers. Nonlinear optics of semiconductor lasers. Moscow: Nauka Publisher; 1986; Proceedings of the Physics Institute, Acad. Sci.; 166: 3-14
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