Title :
Variation in length of gauge blocks calibration using interferometry technique and machine vision
Author :
Phuaknoi, Pawat ; Buajarern, Jariya ; Tonmueanwai, Anusorn
Author_Institution :
Dimensional Metrol. Dept., Nat. Inst. of Metrol. (Thailand), Pathumthani, Thailand
Abstract :
A Michelson interferometer method for determining the variation in length of gauge blocks is presented. This method is based on phase shift interferometer measuring a fringe fraction of the interference fringes on a gauge block measuring surface and its auxiliary plate. The reference standard of measurement is the wavelength of stabilized He-Ne Laser at 633 nm which is traceable to the international standard of the metre. The system was also verified by the 543 nm stabilized He-Ne Laser. The interference fringe patterns are observed by a CCD camera and the images are processed by a Machine Vision system. This make the system run automatically and fulfill. The measurement results were compared with the standard method and they agree with comparable uncertainty.
Keywords :
CCD image sensors; Michelson interferometers; computer vision; gas lasers; helium; light interference; measurement by laser beam; neon; optical variables measurement; CCD camera; Gauge block calibration; He-Ne; Michelson interferometer method; auxiliary plate; fringe fraction; gauge block length variation; image processing; interference fringe patterns; machine vision system; phase shift interferometer; stabilized He-Ne Laser; wavelength 543 nm; wavelength 633 nm; Calibration; Cameras; Interference; Length measurement; Optical interferometry; Phase shifting interferometry; Wavelength measurement; Gauge block; Interferometer; Variation;
Conference_Titel :
Electrical Engineering/Electronics, Computer, Telecommunications and Information Technology (ECTI-CON), 2013 10th International Conference on
Conference_Location :
Krabi
Print_ISBN :
978-1-4799-0546-1
DOI :
10.1109/ECTICon.2013.6559505
