Patent ID: 7414739

Claim:
A method of calibration for single point laser systems which are used to calculate a selected dimension of an object, comprising the steps of: storing at least two known dimensional aspects of a calibration bar member, the two known dimensional aspects being two separate dimensions of a calibration bar member which are sufficiently different that the system will not mistake a wood board for a calibration bar member, and wherein a second dimensional aspect is obtained by rotating the calibration bar approximately 90°; placing the calibration bar in an original orientation within a scan zone of the laser system having two lasers with the scan zone therebetween; determining the distance between each of the opposing lasers and the calibration bar in a first dimensional aspect; presenting the second dimensional aspect of the calibration bar to the two lasers within the scan zone; determining the distance between each of the two lasers, respectively, and the calibration bar in the second dimensional aspect; using the determined distances and the known values of the first and second dimensional aspects of the calibration bar to ensure that a calibration bar is being viewed by the lasers instead of another object; using the determined distance for the first and second dimensional aspects and the known dimensions of the calibration bar to obtain calibration information based on the distance between the two lasers; and calibrating the laser system based on the calibration information.