Method for measuring the location of an object by phase detection

摘要

A method for measuring the location of an object in an observed space by means of a fixed observation system connected to a processing unit for generation of an image comprising a pixel matrix, the object being provided with a test marker. The test marker comprises a periodic pattern in two dimensions and a digital processing of the image of the test marker is carried out to produce an image comprising a first grating and an image comprising a second grating which are analyzed digitally to calculate the position of the test marker within the matrix of pixels.