Patent ID: 8081840

Claim:
Method for measuring or controlling an optical part ( 3 ) by means of a device comprising at least lighting means ( 1 ) and an associated system of artificial vision ( 2 ), in which the optical part ( 3 ) may be interposed between the lighting means ( 1 ) and the artificial vision system ( 2 ), said lighting means ( 1 ) comprising optoelectronic means for producing a luminous background with a definition chart that is globally fixed and made of a plurality of programmable pixels of a luminance that can vary in time, characterised by the following successive steps: a plurality of definition charts are consecutively generated in time, each comprising a periodic pattern that is contrastingly repeated over a uniform background so that said consecutive definition charts are spatially shifted relative to one another, a plurality of images of said shifted definition charts are collected by the artificial vision system ( 2 ) after reflection or transmission by the optical part ( 3 ), said images are recombined in the form of a single compound image, data about the measurement or control is extracted from the single compound image; wherein the periodic pattern has a spatial frequency between 0.01 and 100 patterns/mm in a specified direction; or wherein two adjacent patterns are separated by an angle between 0.1 and 30 degrees, said angle being measured from a point of the object through which the pattern is observed.