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发明授权
US08658965B2 Encoder having a pattern track including different-width patterns 有权
编码器具有包括不同宽度图案的图案轨迹

Encoder having a pattern track including different-width patterns
摘要：
An encoder which measures displacement of a moving part includes a light-emitting unit; a moving part which moves relative to the light-emitting unit; a first pattern track which includes a plurality of first unit patterns sequentially formed on the moving part, separated from one another and having different widths; a first light-receiving unit which is disposed to correspond to the light-emitting unit and detects first information light received from the light-emitting unit via a first pattern of the first unit patterns; at least one second light-receiving unit which is disposed to correspond to the light-emitting unit and detects second information about light received from the light-emitting unit via at least one second pattern of the first unit patterns; and a displacement calculating unit which calculates a relative displacement of the moving part with respect to a reference position based on the first and second information.
摘要（中）：

测量移动部件的位移的编码器包括：发光单元; 相对于发光单元移动的移动部件; 第一图案轨迹，其包括顺序地形成在所述移动部分上的彼此分离并且具有不同宽度的多个第一单位图案; 第一光接收单元，其设置成对应于所述发光单元，并经由所述第一单元图案的第一图案检测从所述发光单元接收的第一信息光; 至少一个第二光接收单元，其设置成对应于所述发光单元，并且经由所述第一单元图案的至少一个第二图案检测关于从所述发光单元接收的光的第二信息; 以及位移计算单元，其基于所述第一信息和所述第二信息来计算所述移动部件相对于基准位置的相对位移。

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