| 发明名称 |
FOCUSING METHOD AND APPARATUS FOR READING TWO DIMENSIONAL OPTICAL INFORMATION SETS AND THE LIKE |
| 摘要 |
The present invention is a focusing system for focusing optically readable information over a substantial range of distances. The focusing system (10) includes a first optical wedge (12) and a second optical wedge (14) with a reciprocating drive for moving the prisms relative to each other. |
| 申请公布号 |
WO9427172(A1) |
申请公布日期 |
1994.11.24 |
| 申请号 |
WO1994US05381 |
申请日期 |
1994.05.11 |
| 申请人 |
NORAND CORPORATION |
发明人 |
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| 分类号 |
G02B5/04;G02B7/18;(IPC1-7):G02B5/04 |
主分类号 |
G02B5/04 |
| 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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