The simultaneous measurement of the linear displacement and two rotation angles (yaw and pitch) of a moving object using a laser sensor based on the self-mixing effect is reported. The laser head includes three commercial diode lasers equipped with monitor photodiodes. The target is a plane mirror attached to the moving object. The linear and angular resolutions are 0.7 um and 0.008° (2.7 arcsec), respectively. The linearity of the sensor response has been verified over a range of 1 m and 0.4°. Using three retroreflector prisms with a diameter of 10mminstead of the plane mirror, the angular range of yaw and pitch has been improved by one order of magnitude.
A compact three degrees-of-freedom motion sensor based on the laser-self-mixing effect
DABBICCO, Maurizio;SCAMARCIO, Gaetano;
2008-01-01
Abstract
The simultaneous measurement of the linear displacement and two rotation angles (yaw and pitch) of a moving object using a laser sensor based on the self-mixing effect is reported. The laser head includes three commercial diode lasers equipped with monitor photodiodes. The target is a plane mirror attached to the moving object. The linear and angular resolutions are 0.7 um and 0.008° (2.7 arcsec), respectively. The linearity of the sensor response has been verified over a range of 1 m and 0.4°. Using three retroreflector prisms with a diameter of 10mminstead of the plane mirror, the angular range of yaw and pitch has been improved by one order of magnitude.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
