The sensor measuring model is analyzed

the transform between image coordinate and pixel coordinate is derived according to camera distortion model.On that basis

a two variables and quintic polynomial parameter modal include sensor coordinates and corresponding image coordinates of line structured light and calibration method for modal are proposed.Sensor coordinates and corresponding image coordinates of the calibration points are got by the zigzag calibration block on numerical control platform.The coefficients of the polynomial are optimized by the least square method.The calibration and measurement experiments show that the method is effective and convenient

and is fitted for measurement requirement.