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Proceedings Paper

Monitoring the optical polishing process by computerized microscopy techniques
Author(s): Vincenzo Greco; C. Iemmi; S. Ledesma; Giuseppe Molesini; Franco Quercioli
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Paper Abstract

This work relates to the glass polishing process in optical workshops, classically based on pitch lapping of ground surfaces. The process progressively removes the asperities and lowers the surface toward the bottom of the remaining pits. According to Preston's hypothesis, the polishing rate is proportional to the velocity of the lap and to its pressure on the area of contact. A computerized imaging technique is here reported to monitor the progress of the polishing action. A Nomarski microscope with a 16X objective has been equipped with a TV camera connected to a personal computer. A frame grabber provides image data that are elaborated to work out the surface features. Statistics are obtained on the fractional area covered by the residual pits. Referring to the Preston's hypothesis, the measured parameter is related to the actual finish grade of the surface inspected.

Paper Details

Date Published: 15 November 1994
PDF: 3 pages
Proc. SPIE 2248, Optical Measurements and Sensors for the Process Industries, (15 November 1994); doi: 10.1117/12.194353
Show Author Affiliations
Vincenzo Greco, Istituto Nazionale di Ottica (Italy)
C. Iemmi, Istituto Nazionale di Ottica (Italy)
S. Ledesma, Istituto Nazionale di Ottica (Italy)
Giuseppe Molesini, Istituto Nazionale di Ottica (Italy)
Franco Quercioli, Istituto Nazionale di Ottica (Italy)


Published in SPIE Proceedings Vol. 2248:
Optical Measurements and Sensors for the Process Industries
Christophe Gorecki; Richard W. T. Preater, Editor(s)

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