Operating scanner for optical density measurement involves triggering scanning according to and depending on detection of reference object at defined distance from measurement object

摘要

The method involves scanning the measurement object (17) with a sensor arrangement. At least one trigger signal is generated according to and depending on the detection of a reference object (20) on the print medium (13) at a predetermined distance from the measurement object in the transport direction to initiate a scanning process that detects the measurement object. Independent claims are also included for the following: a scanning device for implementing the method.