Instrumentation, Techniques, and Measurement

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

[+] Author Affiliations
Gianpaolo Savio, Gianmaria Concheri

University of Padova, Department of Civil Environmental and Architectural Engineering, Padova, Italy

Raj Kumar Pal

Academy of Scientific and Innovative Research, CSIR-Central Scientific Instruments Organization Campus, Chandigarh, India

CSIR-Central Scientific Instruments Organization, Optical Devices and Systems, Chandigarh, India

Roberto Meneghello

University of Padova, Department of Management and Engineering, Vicenza, Italy

Luciano D'Angelo

University of Ferrara, Department of Engineering, Ferrara, Italy

Opt. Eng. 56(2), 024101 (Feb 01, 2017). doi:10.1117/1.OE.56.2.024101
History: Received August 25, 2016; Accepted January 18, 2017
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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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© 2017 Society of Photo-Optical Instrumentation Engineers

Citation

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", Opt. Eng. 56(2), 024101 (Feb 01, 2017). ; http://dx.doi.org/10.1117/1.OE.56.2.024101


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