CALIBRATION METHODOLOGY FOR LATERAL RESOLUTION OF STRIPE LASERS
Original Publication Date: 1993-Jun-30
Included in the Prior Art Database: 2004-Apr-06
Xerox Disclosure Journal
Robotic vision systems using laser based sensors to measure height profiles on target objects house a laser light source and a detector array together in one unit. Such two dimensional laser based reflective range sensor systems project a stripe of laser light onto an object which is then reflected onto the detector array. Imaged laser light on the detector array renders a profile which depicts the relative height (or range) of the object for each lateral position (or resolution) along the laser stripe. Often the lateral resolution of a detector array is not precisely known and varies across the range of the sensor. The accuracy of the lateral position along a detector array is important to the precision of applications that require transformations or rotations of sensor data in order to obtain measurements perpendicular to the plane of an object.