DETERMINING THE POSITION OF AN OBJECT IN THE BEAM PATH OF AN OPTICAL DEVICE

摘要

In order to determine a position of an object (100) parallel to the optical axis (120) of an optical device (1), the object (100) is illuminated from a first illuminating direction (210-1) and a second illuminating direction (210-2), and an image (230-1, 230-2) is captured for each illuminating direction. The position of the object (100) is determined on the basis of a distance (250) between imaging points of the object (220-1, 220-2) in the images (230-1, 230-2).