发明名称 |
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. |
申请公布号 |
US8658965(B2) |
申请公布日期 |
2014.02.25 |
申请号 |
US20110983568 |
申请日期 |
2011.01.03 |
申请人 |
AN MIN-HA;CHOI HYONG-SU;LEE TAE-YOUNG;SEOK DONG-JU;SAMSUNG TECHWIN CO., LTD. |
发明人 |
AN MIN-HA;CHOI HYONG-SU;LEE TAE-YOUNG;SEOK DONG-JU |
分类号 |
G01D5/34;G01B5/24;G01B17/00;G01D5/347 |
主分类号 |
G01D5/34 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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