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Optical Engineering

Instrument for on-line monitoring of surface roughness of machined surfaces
Author(s): James Glenn Valliant-Levine; Michael P. Foley; Jean M. Bennett
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Paper Abstract

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.

Paper Details

Date Published: 1 December 2000
PDF: 8 pages
Opt. Eng. 39(12) doi: 10.1117/1.1318786
Published in: Optical Engineering Volume 39, Issue 12
Show Author Affiliations
James Glenn Valliant-Levine, Optical Dimensions, LLC (United States)
Michael P. Foley, Optical Dimensions, LLC (United States)
Jean M. Bennett, Naval Air Warfare Ctr. (United States)


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