Method for evaluating smooth surfaces

Details Method for evaluating smooth surfaces Method for evaluating smooth surfaces

1988-01-29

1989-08-01

Levy, Stewart J.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

356376, 73105, H04N 718, G01B 1124

Patent

active

048537772

ABSTRACT:
The short-term and long-term waviness of a smooth surface is determined quantitatively by a method which impinges light radiation onto the surface, detects the resultant light image, and mathematically processes that image. The method permits a fast, non-contact evaluation of a smooth surface with good correlation between the calculated values and the visual observation.

REFERENCES:
patent: 4249823 (1981-02-01), Task
patent: 4468426 (1984-08-01), Hatchadoorian et al.
patent: 4476489 (1984-10-01), Weltlich et al.
patent: 4629319 (1986-12-01), Clarke et al.
patent: 4634281 (1987-01-01), Eikmeyer
patent: 4647197 (1987-03-01), Kitaya et al.
Faust, "Real Time Measurement of Veneer Surface Roughness by Image Analysis", From Forest Products Journal, vol. 37, No. 6 (Jun. 1987) pp. 34-40.
Colton, "The Optical Characterization of the Surface of Polymeric Composites", from Laboratory for Manufacturing and Productivity School of Engineering (Feb. 1981), pp. 1-74.

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