Shape and curvature error estimation in polished surfaces of ground glass molds

Gianpaolo Savio; Raj Kumar Pal; Roberto Meneghello; Luciano D'Angelo; Gianmaria Concheri

doi:10.1117/1.OE.56.2.024101

1 February 2017 Shape and curvature error estimation in polished surfaces of ground glass molds

Gianpaolo Savio, Raj Kumar Pal, Roberto Meneghello, Luciano D'Angelo, Gianmaria Concheri

Author Affiliations +

Funded by: University of Padova

Optical Engineering, Vol. 56, Issue 2, 024101 (February 2017). https://doi.org/10.1117/1.OE.56.2.024101

Abstract

In the fabrication process of aspheric glass lens and molds, shape characterization is a fundamental task to control geometrical errors. Nevertheless, the more significant geometrical functional aspect related to the optical properties is the curvature, which is rarely investigated in the manufacturing process of lenses. Algorithms for the assessment of shape and curvature errors on aspheric surface profile are presented. The method has been investigated on profiles measured before and at different steps of the membrane polishing process. The results show how surface roughness, shape, and curvature change during the polishing process as a function of the machining time.

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Gianpaolo Savio, Raj Kumar Pal, Roberto Meneghello, Luciano D'Angelo, and Gianmaria Concheri "Shape and curvature error estimation in polished surfaces of ground glass molds," Optical Engineering 56(2), 024101 (1 February 2017). https://doi.org/10.1117/1.OE.56.2.024101

Received: 25 August 2016; Accepted: 18 January 2017; Published: 1 February 2017

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