In order to guarantee surface precision of using locus shaping method machining optical parts, the factors of fine grinding machine which affects surface error of part is theoretically analysed.
为了保证用轨迹成型法加工光学零件的面形精度，对精密磨削机床影响工件面形误差的因素进行了理论分析。
It is impossible that the surface gained by any machining is perfectly slippery. There is some microcosmic error of geometrical shape on the surface.
任何机械加工所得的表面，实际上不可能是理想的光滑表面，总是存在一定的微观几何形状误差。
The surface machining precision of the accessories is denoted by relevant parameters, such as the parameters of surface roughness, the parameters of ripple, the parameters of shape error and so on.
零件的表面加工精度由相应的参数来表征，例如表面粗糙度参数、波纹度参数和形状误差参数等。
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