Improving the quality of fiber-optic-based surface-roughness sensing instrument using robust design methodology

Devdas Shetty

doi:10.1117/12.145536

28 May 1993 Improving the quality of fiber-optic-based surface-roughness sensing instrument using robust design methodology

Devdas Shetty

Author Affiliations +

Proceedings Volume 1821, Industrial Applications of Optical Inspection, Metrology, and Sensing; (1993) https://doi.org/10.1117/12.145536
Event: Applications in Optical Science and Engineering, 1992, Boston, MA, United States

Abstract

The primary limitation of the conventional techniques of surface roughness measurement is that the stylus has to traverse perpendicular to the machine lay always. The present research looks at the non contact, fiber optics based methodology using solid state lasers, which evaluates surface finish independent of the machine lay and surface orientation. The basic principle involves using diffracted laser light and digitizing the information to measure surface irregularities. The research has wide applications in manufacturing industries. One typical application described is the measurement of surface irregularities of a contoured turbine blade root attachment area as used in Aerospace industry. The paper outlines the optimization of the instrument using Design of Experiments or Robust Design procedure. The paper explains the steps involved in achieving reliable and quality design by taguchi experimentation.

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Devdas Shetty "Improving the quality of fiber-optic-based surface-roughness sensing instrument using robust design methodology", Proc. SPIE 1821, Industrial Applications of Optical Inspection, Metrology, and Sensing, (28 May 1993); https://doi.org/10.1117/12.145536

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KEYWORDS

Surface roughness

Diffraction

Calibration

Fiber optics

Light scattering

Inspection

Manufacturing

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