光学ガラスのペレット研磨による球面創成 : 凸面創成の場合

概要

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Generation of spherical surfaces of optical glass is investigated in fine abrading by using a lens polishing machine. Simulation and experiment concern the abrading process to get convex surface shapes of works with relatively low ratios of radius to aperture. Changes in surface shapes of works and tools are followed by treating their surfaces as surfaces of the fourth order of revolution and spherical surfaces at the same time. The main results are as follows. (1) Abrading by using the tool with an exactly spherical surface leads the work to have some deviation from the sphere with surface undulation of low frequencies. (2) It is preferable to use the tool as the upper workpiece in order to get low surface undulation. (3) Stationary surface shape of the work after enough abrasion is almost the same even if its initial shape is considerably different (but the initial shape of the tool and the abrading conditions are the same). The abrading time to get the stationary surface shape varies depending on the initial shapes of the works. This time is easily predicted by the differential equation which is provided to prescribe the abrading process.
公益社団法人精密工学会の論文
1985-03-05