发明授权
US07224538B2 Electro-optical reader with improved laser intensity modulation over extended working range
有权
电光读取器,在延长的工作范围内具有改善的激光强度调制
- 专利标题: Electro-optical reader with improved laser intensity modulation over extended working range
- 专利标题(中): 电光读取器,在延长的工作范围内具有改善的激光强度调制
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申请号: US11369130申请日: 2006-03-06
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公开(公告)号: US07224538B2公开(公告)日: 2007-05-29
- 发明人: Igor Vinogradov , Vladimir Gurevich , David Tsi Shi , Dariusz J. Madej , Mehul M. Patel , Edward Barkan , Heng (Jade) Zhang
- 申请人: Igor Vinogradov , Vladimir Gurevich , David Tsi Shi , Dariusz J. Madej , Mehul M. Patel , Edward Barkan , Heng (Jade) Zhang
- 申请人地址: US 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: US NY Holtsville
- 代理机构: Kirschstein, et al.
- 主分类号: G02B3/02
- IPC分类号: G02B3/02
摘要:
The combination of a rooftop optical element and a soft edge aperture stop, as well as the introduction of a negative spherical aberration in a positive focusing lens, improve working distance and depth of focus in both moving beam and imaging readers for electro-optically reading indicia such as bar code symbols, especially for close-in symbols, and moreover tend to reduce undesirable light intensity modulation in the beam profile thereby improving reader performance.
公开/授权文献
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IPC分类:
G | 物理 |
G02 | 光学 |
G02B | 光学元件、系统或仪器 |
G02B3/00 | 简单或复合透镜 |
G02B3/02 | .具有非球面的(G02B3/10优先) |