发明名称 |
Axial chromatic aberration auto-focusing system and method |
摘要 |
A system and method utilizing the principles of axial chromatic aberration for auto-focusing an image onto an image sensor are provided. The system and method are particularly suitable for incorporation within an optical code reader. A signal processor analyzes data signals representative of the intensity or magnitude of wavelength components of an impinged image onto the image sensor for determining a value indicative of the focus quality of the impinged image. An actuator controls movement of a lens in accordance with the determination until obtainment of a desired focus quality. A decoder decodes the image having the desired focus quality.
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申请公布号 |
US7478754(B2) |
申请公布日期 |
2009.01.20 |
申请号 |
US20030648176 |
申请日期 |
2003.08.25 |
申请人 |
SYMBOL TECHNOLOGIES, INC. |
发明人 |
GUREVICH VLADIMIR;KRICHEVER MARK;CARLSON BRADLEY S.;TAN CHINH |
分类号 |
G03B7/08;G06K7/10 |
主分类号 |
G03B7/08 |
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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