ZERO REFERENCE GENERATING METHOD AND APPARATUS FOR OPTICAL ENCODERS

申请公布号：CA1264078(A)

申请号：CA19850494255

申请日期：1985.10.30

申请公布日期：1989.12.27

申请人：

BEI ELECTRONICS, INC.

发明人：LAPLANTE, DALE

分类号：G01D5/36;H03M1/30;(IPC1-7):G01D5/32

主分类号：G01D5/36

摘要：<p>Improved Zero Reference Generating Method And Apparatus For Optical Encoders An encoder for providing positional information about a moveable member comprising code member means couplable to the moveable member for movement with the moveable member, reference means positioned to be stationary relative to the code member, an index sequence positioned on the code member, a mask sequence positioned on the reference member means, and means for detecting the degree of registration between the index sequence and the mask sequence, wherein the index sequence and the mask sequence include a plurality of building block patterns that are separated by predetermined spacings.</p>

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