METHOD FOR COMPENSATING FOR TEMPERATURE RELATED MEASUREMENT ERRORS IN A CONFOCAL CHROMATIC MEASURING DISTANCE SENSOR

摘要

According to the invention, a method for compensating for temperature related measurement errors in an optical arrangement, comprising at least one lens (2) is designed with a view to an economical and reliable as possible compensation for temperature related measurement errors without significant increased production expense, wherein a multicoloured beam (5) is passed through the optical arrangement (1, 1′), which is focussed at points at varying distances from the lens (2) as a result of the chromatic aberration of the lens (2), at least a part of the spectrum of the light beam (5) being at least partly reflected within the optical arrangement (1, 1′) and directed to a detector device (12) by means of which a determination of a spectrum is carried out, the temperature of the arrangement (1, 1′) is determined from the spectrum recorded by the detection device (12) and a compensation for temperature related measurement errors is carried out based on the temperature determined thus. A corresponding optical arrangement in disclosed.