Encoder

专利名称：Encoder发明人：Nagura, Chihiro申请号：EP12163899.3申请日：20120412公开号：EP2511670A2公开日：20121017

专利附图：

摘要：An encoder includes a scale (20), a detector array (16A) that includes a pluralityof detectors, and a signal processor (30) configured to process and convert intopositional information, an output signal from the detector array. The signal processorincludes a first phase acquirer (32) configured to acquire a first phase of a first

modulation period from an output signal of the detector array. The encoder furtherincludes a weighting unit configured to weight an output signal from each of a plurality ofdetectors using a weight in accordance with a position of the detector array. The weight isset so that in a predetermined range that contains a spatial frequency corresponding tothe second modulation period in a spatial frequency response of the first phase acquirer,a value weighted by the weighting unit is equal to or smaller than a non-weighted value.

申请人：Canon Kabushiki Kaisha

地址：30-2 Shimomaruko 3-chome Ohta-ku Tokyo 146-8501 JP

国籍：JP

代理机构：TBK

更多信息请下载全文后查看