Controllable fabrication of freeform optics. (7th October 2013)

• Record Type: Journal Article
• Authors: Zhang, X.D.; Wang, Q.C.; Fang, F.Z.; Liu, X.L.
• Is Part Of: International journal of precision technology. Volume 3:Number 3(2013)
• Page Start: 277
• Page End: 289
• Publication Date: 2013-10-07
• Subjects: ultra–precision machining -- on–machine measuring -- robust filtering -- freeform optics -- advanced optical systems -- ultra–precision turning -- laser probes -- unit decomposition algorithm -- metrology -- robust weight function -- Gaussian filtering -- simulation; Production engineering -- Periodicals; Mechanical engineering -- Periodicals; 670.5
• Languages: English
• ISSNs: 1755-2060

Abstract

Freeform optics is the next–generation optics to be used widely in advanced optical systems. The approach of trial and error loops is always employed to achieve the required form accuracy. Controllable fabrication based on on–machining measurement is proposed in this study. The laser probe is mounted on an ultra–precision turning machine to measure the freeform in the spiral path. A unit decomposition algorithm (UDA) is proposed to supply the proper arrangement of measuring data for the filtering and composition. A modified robust weight function (MRWF) is also presented to improve the performance of the 3D robust Gaussian filtering (RGF). Simulation experiments and case studies are carried out to verify the validity of the controllable fabrication method.