Surface inspection using optical fiber sensor

Makoto Abe; Shigekata Ohta; Masaji Sawabe

doi:10.1117/12.51087

1 January 1991 Surface inspection using optical fiber sensor

Makoto Abe, Shigekata Ohta, Masaji Sawabe

Proceedings Volume 1332, Optical Testing and Metrology III: Recent Advances in Industrial Optical Inspection; (1991) https://doi.org/10.1117/12.51087
Event: 34th Annual International Technical Symposium on Optical and Optoelectronic Applied Science and Engineering, 1990, San Diego, CA, United States

Abstract

A new optical fiber sensor with 2 light beams is developped for detecting variation of scattered light distribution caused by surface defects, like flaws, surface inferiority, etc. Its feature consists in compact structure using only light transmission characteristic proper to the optical fiber, using no optical components like a lens. High response speed of maximum 2m/s is suited to purpose of non con- tact in-process or in-line defect detection and with automation of inspection process performed in the past visual or sampling method, the stabilization of inspection level is achieved and inspection eff i- ciency is improved by introduction of this sensor. In this paper, the principle of surface defect detection with the optical fiber sensor and the quantification of surface properties by conversion of detection output into arithmetical mean deviation are described, and the system structure on representative examples of practical application in actual inspection process is explained.

Citation Download Citation

Makoto Abe, Shigekata Ohta, and Masaji Sawabe "Surface inspection using optical fiber sensor", Proc. SPIE 1332, Optical Testing and Metrology III: Recent Advances in Industrial Optical Inspection, (1 January 1991); https://doi.org/10.1117/12.51087

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