Holographic Characterization of Ceramics. Part III. Measurement of Surface Roughness.
Final rept., 20 Jan 72-20 Feb 73,
TRW SYSTEMS GROUP REDONDO BEACH CALIF
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The measurement of rough material surfaces using coherent laser light is investigated. A stochastic analysis relating the statistical parameters of random surfaces to the statistical parameters of a coherent diffraction pattern scattered by the surface is presented. The relationship of the standard deviation sigma z and the autocorrelation distance Tz to the average bi-directional light intensity is shown as is the probability density function of the individual coherent intensities. The experimental verification of theory is then demonstrated and the optical characterization of surfaces with known properties is performed. The application of these techniques to the characterization of ceramic surfaces and processes is discussed. Author
- Ceramics, Refractories and Glass
- Test Facilities, Equipment and Methods