发明授权
- 专利标题: Laser measurement apparatus using self-mixing effect
- 专利标题(中): 激光测量装置采用自混合效果
-
申请号: US10597701申请日: 2005-02-08
-
公开(公告)号: US07439484B2公开(公告)日: 2008-10-21
- 发明人: Martin Dieter Liess , Aldegonda Lucia Weijers
- 申请人: Martin Dieter Liess , Aldegonda Lucia Weijers
- 申请人地址: NL Eindhoven
- 专利权人: Koninklijke Philips Electronics, N.V.
- 当前专利权人: Koninklijke Philips Electronics, N.V.
- 当前专利权人地址: NL Eindhoven
- 优先权: EP04100461 20040209
- 国际申请: PCT/IB2005/050490 WO 20050208
- 国际公布: WO2005/076116 WO 20050818
- 主分类号: H01J40/14
- IPC分类号: H01J40/14
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 (ΔZ) 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.