Patent ID: 11966811
Assignee: COGNEX CORPORATION
Field: Computer technology (Electrical engineering)
Classification: CPC G | IPC G

Claim 12:
13. A method for acquiring an image of a symbol on an object using a vision system having at least one lens, the method comprising:
projecting a first light beam to the object coaxially with a reader optical axis of the vision system, to project an aimer pattern on the object;
receiving reflected light from the object based on the first light beam, coaxially with the reader optical axis;
directing the reflected light to an axis different from the reader optical axis;
determining, using one or more processor devices, a distance between the at least one lens of the vision system and the object based on the reflected, directed light from the first light beam;
determining, using the one or more processor devices, a desired optical power for the at least one lens based on the determined distance;
adjusting, using the one or more processor devices, a focus of the at least one lens based on the desired optical power; and
acquiring an image of the symbol on the object.