The spectacle frames scanner is an important part in the non-modeling lens-edger system, for its function to measure the profile of the spectacle frames and elicit its 3D data for lens-edging. We propose a new spectacle frames scanner based on multi-linear structured light which is a non-contact type. The experiment devices of the proposed system include a portable projector, a 12mm prime lens and an area array CCD camera. The technology of binary stripes and single-camera image collection are used in the new scanner. The original stripes are modulated by the spectacle frames, so we can collect the images and demodulate the 3D data of the spectacle frames based on trigonometry theory. The factors that influence the measurement accuracy of the scanner system are analyzed and the relationship between structure parameters and measurement error of the system has been determined. According to the result of the simulation, we determine the optimal structure parameters of the spectacle frames scanner system. Experiment result for resin frames with high reflectivity is given.

Date Published: 19 October 2016
PDF: 8 pages
Proc. SPIE 10155, Optical Measurement Technology and Instrumentation, 1015530 (19 October 2016); doi: 10.1117/12.2247302

Published in SPIE Proceedings Vol. 10155:
Optical Measurement Technology and Instrumentation
Sen Han; JiuBin Tan, Editor(s)