Modelling of Laser Scanning System to Determine its Associated Uncertainty of Measurement

Chaudhary, K.P. and Arif, S.M. and Moitra , Shashi (2010) Modelling of Laser Scanning System to Determine its Associated Uncertainty of Measurement. MAPAN- Journal of Metrology Society of India, 25 (4). pp. 229-237. ISSN 0974-9853

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Abstract

In the fabrication of fine wires such as filaments of lamps and optical fibers, it is always necessary to measure the diameter in real-time and correct the extrusion process. For metrological purposes, laser beam scanning technique will produce similar results as comparative to diffraction-assisted methods. A computerized laser beam scanning measurement system (LSM) is designed and fabricated. The LSM consists of a low power helium-neon gas laser source, a specially designed collimating lens, a hysteresis synchronous motor, a photo detector and a protective replaceable window along with temperature sensor. The LSM is mathematically modeled to identify various error contributing sources. The LSM is calibrated using a set of national reference standard cylindrical pins and a set of national reference standard slots to determine its relative calibration factor. The uncertainty of measurement achieved in the range of (0-35) mm is ± (0.55 +39.2L/m) μm.

Item Type: Article
Subjects: CSIO > Photonics Instrumentation
Depositing User: Ms T Kaur
Date Deposited: 02 Feb 2012 14:34
Last Modified: 10 Apr 2012 16:50
URI: http://csioir.csio.res.in/id/eprint/128

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