工具切込み量の回転角同期制御による非球面鏡の加工

概要

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A numerically controlled, precision diamond flycutting mechanism has been developed, where tool cutting depth is dynamically controlled in synchronizing to tool rotational angle. This technique permits fabrication of aspheric mirrors used in soft X-ray application equipments, with a contour accuracy of 0.1 μm peak to valley. A piezoelectric stack actuator is used for tool cutting depth control. To correct hysteresis and drift with a piezo-actuator, a referential piezo-actuator with the same characteristics as that of the tool is driven in a closed roop control. The signal supplied to the referential piezo-actuator simultaniously drives the tool actuator. A spherical mirror and a toroidal mirror are cut to evaluate developed flycutting technology.
公益社団法人精密工学会の論文
1989-01-05