发明名称 |
Light arrangement for vision system including a light controller with an external device |
摘要 |
A lighting arrangement for use in vision systems and imaging applications. The arrangement illuminates the object to be imaged with a supplied light of a specified illumination. The intensity, hue, and directionality of the supplied light can be varied. The desired illumination is specified either by manually operable controls or via a programming interface. The arrangement has a light source which includes light-emitting diodes mounted in a housing. The source provides a constant light output over a long lifetime. A light sensor senses the total illumination on the object being imaged resulting from ambient light in addition to the supplied light, and a negative feedback circuit in the arrangement can adjust the level of the supplied light in response so as to maintain a constant total illumination on the object despite variations in the ambient lighting.
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申请公布号 |
US6943333(B2) |
申请公布日期 |
2005.09.13 |
申请号 |
US20030618827 |
申请日期 |
2003.07.14 |
申请人 |
HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P. |
发明人 |
EMERY KEITH;JUSTICE GEORG G |
分类号 |
G01J1/42;(IPC1-7):G01J1/32 |
主分类号 |
G01J1/42 |
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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