发明授权
- 专利标题: Optical scanner with extended depth of focus
- 专利标题(中): 光学扫描仪具有较长的焦距
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申请号: US850967申请日: 1997-05-05
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公开(公告)号: US5814827A公开(公告)日: 1998-09-29
- 发明人: Joseph Katz
- 申请人: Joseph Katz
- 申请人地址: NY Holtsville
- 专利权人: Symbol Technologies, Inc.
- 当前专利权人: Symbol Technologies, Inc.
- 当前专利权人地址: NY Holtsville
- 主分类号: G06K5/00
- IPC分类号: G06K5/00
摘要:
A scanner with an extended depth of focus for electro-optically reading indicia having parts of different light reflectivity, comprises a collection optical system for collecting radiation reflected from objects in the field of view along plural different optical axes and an optical detector for detecting radiation collected by the collection optical system along each of the plural different optical axes and for generating electrical output signals indicative thereof. The scanner further includes processing circuitry for processing the output signals of the optical detector by comparing the output signals of the optical detector with one another, a memory for storing the detector output signals and further processing circuitry receiving the stored output signals of the optical detector from the memory and selectively outputting one of the received signals to a decoder.
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