Restraint of path effect on optical surface in magnetorheological jet polishing

Applied Optics
Tan WangWentao Wu

Abstract

Path effect on a polished surface always matches tool motions and manifests as mid-spatial frequency (MSF) errors in magnetorheological jet polishing processing. To control the path effect, extended methods and part-constrained paths are presented in this paper. The extended methods, Zernike extension and Neighbor-Gerchberg extension, are developed for building an extended surface with a weak edge effect in simulation. Under the constraint of the pitch principle, the unicursal part-constrained path is presented to enhance the randomness of the tool path, including path turns and dwell-point positions. Experiments are executed to validate the effectiveness of these measures for diminishing MSF errors. The peak to valley and root mean square of the surface are improved from 0.220λ and 0.047λ (λ=632.8  nm) to 0.064λ and 0.007λ, respectively, while simultaneously restricting the path effect.

References

Jan 13, 2004·Applied Optics·Silvia M BooijJoseph J M Braat
Jul 8, 2009·Optics Express·Christina R Dunn, David D Walker
Jan 1, 1977·Applied Optics·R A Jones
May 1, 1980·Applied Optics·J Y Wang, D E Silva
May 15, 1981·Applied Optics·R J Marks Ii
Oct 14, 2010·Optics Express·Dae Wook KimJames H Burge
Feb 12, 2014·Applied Optics·Yunpeng FengHon-Yuen Tam
Oct 17, 2014·Applied Optics·Tan WangHonyuen Tam

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