发明名称 |
Laser focusing aperture and method |
摘要 |
Light is focused in a system for electro-optically scanning and reading bar code symbols by an aperture stop having a first optical portion for optically modifying a first part of a light beam to have a beam cross-section of a known size within a depth of field in which a symbol to be read is scanned by the first beam part, and a second light-transmissive, optical portion bounding the first portion and operative for optically modifying and directing a second part of the light beam away from the first part.
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申请公布号 |
US6454167(B1) |
申请公布日期 |
2002.09.24 |
申请号 |
US19990373279 |
申请日期 |
1999.08.12 |
申请人 |
SYMBOL TECHNOLOGIES, INC. |
发明人 |
BARKAN EDWARD;TAN CHINH;BHARGAVA VIKRAM;STERN MIKLOS |
分类号 |
G02B3/08;G02B7/32;G02B26/10;G02B27/09;G06K7/10;(IPC1-7):G06K7/10 |
主分类号 |
G02B3/08 |
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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