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10 January 2020 Migrating magnetorheological finishing process plans between different optical materials
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Determination of the removal function is an important step in magnetorheological finishing (MRF) of optical materials. However, the removal function is difficult to determine if a spot sample of the same material as that needing polish is unavailable, thus preventing establishment of an MRF process plan. A method to resolve this issue is proposed, wherein an MRF process plan for an item of a differing optical material is migrated. The theoretical basis for migration is investigated, and simulations reveal that narrow nonlinear regions of the source and target materials’ removal functions are a necessary condition for adequate convergence rate. The proposed method is experimentally verified by finishing a ZnS part with the process plan of a BK7 optical part of the same geometry, with a convergence rate of 45.7% after four iterations.

© 2020 Society of Photo-Optical Instrumentation Engineers (SPIE) 0091-3286/2020/$28.00 © 2020 SPIE
Hang Yang, Changguo Yan, Yunfei Zhang, and Wen Huang "Migrating magnetorheological finishing process plans between different optical materials," Optical Engineering 59(1), 015103 (10 January 2020).
Received: 4 September 2019; Accepted: 18 December 2019; Published: 10 January 2020

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