发明名称 |
Laser measurement apparatus using self-mixing effect |
摘要 |
In an optical input device based on movement of an object ( 15 ) and the device relative to each other and which comprising at least one optical sensor unit including a laser ( 3 ) having a laser cavity for generating a measuring beam ( 13 ), converging means ( 50 ) for converging the measuring beam in an action plane and for converging measuring beam radiation reflected by the object in the laser cavity to generate a self-mixing effect in the laser and measuring means for measuring the result of the self-mixing effect, which effect is determined by said movement, the converging means ( 50 ) is adapted to provide a self-mixing effect that is smaller than a possible maximum but larger than a detection threshold for an extended range of distances (DeltaZ) between the object and the device. This allows obtaining the required self-mixing effect in an extended range of distances between the object and the device.
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申请公布号 |
US7439484(B2) |
申请公布日期 |
2008.10.21 |
申请号 |
US20050597701 |
申请日期 |
2005.02.08 |
申请人 |
KONINKLIJKE PHILIPS ELECTRONICS, N.V. |
发明人 |
LIESS MARTIN DIETER;WEIJERS ALDEGONDA LUCIA |
分类号 |
H01J40/14;G06F3/03;G06F3/033;G06F3/0354;G06F3/042 |
主分类号 |
H01J40/14 |
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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