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 mu m and 0.8 x 10(-30) (2.7 arcsec), respectively. The linearity of the sensor response has been verified over a range of 1 m and +/- 0.4 degrees. Using three retrorefiector prisms with a diameter of 10 mm instead 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 M;Scamarcio G;Mezzapesa FP
2008
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 mu m and 0.8 x 10(-30) (2.7 arcsec), respectively. The linearity of the sensor response has been verified over a range of 1 m and +/- 0.4 degrees. Using three retrorefiector prisms with a diameter of 10 mm instead 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.
