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Are all aspheric lenses from Edmund Optics® polished using magnetorheological finishing (MRF)?

No, advances in subaperture polishing have allowed for the fabrication of aspheres with surface figure error down to λ/20 (0.25µm)However, MRF is still required for the highest-precision aspheres, such as those with λ/40 (0.125µm) figure error.

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