发明名称 |
NON-PARALLAX OPTICAL AUTO-FOCUSING SYSTEM AND METHOD |
摘要 |
A non-parallax optical auto-focusing system focuses an image and determines a distance to an optical target without being prone to errors due to parallax. The system includes a first beam splitter, a second beam splitter, and a lens positioned therebetween on an optical axis. An aiming beam is directed towards an optical target and the redirected reflected beam is received by a quadrant sensor assembly for generating an output signal indicative of a parameter of the redirected reflected aiming beam. A processor receives the output signal and generates a control signal for actuating an actuator to reposition the lens. The system continues to position the lens until the measured parameter is within a predetermined range for optimally focusing the optical target on an image sensor. The distance to the optical target is determined by using a look-up table to correlate the measured parameter to the distance to the optical target.
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申请公布号 |
WO2005010802(B1) |
申请公布日期 |
2005.05.12 |
申请号 |
WO2004US23022 |
申请日期 |
2004.07.16 |
申请人 |
SYMBOL TECHNOLOGIES, INC.;KRICHEVER, MARK |
发明人 |
KRICHEVER, MARK |
分类号 |
G02B7/28;G06K7/10;(IPC1-7):G06K7/10;G02B21/24 |
主分类号 |
G02B7/28 |
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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