Accession Number : AD0761198

Title :   Holographic Characterization of Ceramics. Part III. Measurement of Surface Roughness.

Descriptive Note : Final rept., 20 Jan 72-20 Feb 73,

Corporate Author : TRW SYSTEMS GROUP REDONDO BEACH CALIF

Personal Author(s) : Roszhart,Terry V. ; Bohn,Jack R.

Report Date : 20 FEB 1973

Pagination or Media Count : 76

Abstract : 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 T(z) 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)

Descriptors :   (*CERAMIC MATERIALS, NONDESTRUCTIVE TESTING), (*NONDESTRUCTIVE TESTING, *STEREOPHOTOGRAPHY), SURFACE ROUGHNESS, FINISHES, SCATTERING, TEST METHODS, TEST EQUIPMENT, LASERS, EXPERIMENTAL DESIGN

Subject Categories : Ceramics, Refractories and Glass
      Holography
      Test Facilities, Equipment and Methods

Distribution Statement : APPROVED FOR PUBLIC RELEASE