Instrument for on-line monitoring of surface roughness of machined surfaces

James Glenn Valliant-Levine; Michael P. Foley; Jean M. Bennett

doi:10.1117/1.1318786

1 December 2000 Instrument for on-line monitoring of surface roughness of machined surfaces

James Glenn Valliant-Levine, Michael P. Foley, Jean M. Bennett

Optical Engineering, Vol. 39, Issue 12, (December 2000). https://doi.org/10.1117/1.1318786

An instrument using laser light scattering at non-normal incidence for measuring surface roughness of machined surfaces in a production environment is described. The Lasercheck instrument is noncontact, has a fast response time (10 samples/s), automatically corrects for sample vibration, and is optimized to measure surface roughness in the 0.2 to 20-min. (0.005- to 0.5-?m) average roughness range; the range can be extended to .40 ?in. (1 ?m) with careful surface alignment. Surface inspection can be close to 100%, and the repeatability is ±0.1%. Although no formal chain of traceability to the National Institute of Standards and Technology has yet been developed for optical roughness-measuring instruments, within its specified operating range the informal agreement of the Lasercheck with NIST traceable instruments and standards is equivalent to that of any commercial profilometer. Examples of the use of the instrument for measuring ground steel surfaces and polyurethane laser-printer rollers are described. The Lasercheck makes possible considerable improvement in surface-finish uniformity and tolerances, less wasted material, and more cost-effective use of production machinery.

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James Glenn Valliant-Levine, Michael P. Foley, and Jean M. Bennett "Instrument for on-line monitoring of surface roughness of machined surfaces," Optical Engineering 39(12), (1 December 2000). https://doi.org/10.1117/1.1318786

Published: 1 December 2000

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