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- W4281682009 abstract "We developed the improved three-point method as measuring machine that is applicable for measurements of various telescope optics, including concave, convex, and off-axis mirrors of high aspheric. The method is small and robust against temperature change and vibration and can extend a conventional machining tool to a measurement tool. We measured the cross section of a flat mirror of ϕ 300 mm with this method on an old milling machine. The result was consistent with that obtained with an interferometer with a discrepancy of 5.5 nm (RMS). For the next stage, we executed two-dimensional measurements of a concave spherical mirror of ϕ 794 mm. The result showed good agreement with that obtained with an interferometer and the method successfully detected an amplitude of 30 nm of small-scale structure in the lateral direction." @default.
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- W4281682009 date "2022-07-07" @default.
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- W4281682009 title "Dragging three-point method for measurement of telescope optics" @default.
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- W4281682009 doi "https://doi.org/10.1364/optcon.462036" @default.
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