Monitoring the optical polishing process by computerized microscopy techniques

Vincenzo Greco; C. Iemmi; S. Ledesma; Giuseppe Molesini; Franco Quercioli

doi:10.1117/12.194353

15 November 1994 Monitoring the optical polishing process by computerized microscopy techniques

Vincenzo Greco, C. Iemmi, S. Ledesma, Giuseppe Molesini, Franco Quercioli

Proceedings Volume 2248, Optical Measurements and Sensors for the Process Industries; (1994) https://doi.org/10.1117/12.194353
Event: Optics for Productivity in Manufacturing, 1994, Frankfurt, Germany

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.

Citation Download Citation

Vincenzo Greco, C. Iemmi, S. Ledesma, Giuseppe Molesini, and Franco Quercioli "Monitoring the optical polishing process by computerized microscopy techniques", Proc. SPIE 2248, Optical Measurements and Sensors for the Process Industries, (15 November 1994); https://doi.org/10.1117/12.194353

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