Abstract
In this paper, shine of machined surfaces was evaluated from the point of view of a reflected light distribution. The reflected light from three kinds of machined surfaces was measured with a gonio-photometer. The reflected light from the muddy surface spread to a wide range. On the other hand, the light from the "black" shine-surface was reflected to two directions. The distribution of reflected light from the "white" shine-surface was the middle shape of other two surfaces. The calculated distributions from the surface roughness curves were similar to measured ones, and micro roughness in the feed marks made surface-shine muddy. Better roughness near the tool cutting edge is important to improve shine of machined surfaces.
