Patent ID: 8271120
Filing Date: 2012-09-18
Classification: B24B

Abstract:
1. A method of finishing an optical element, the method comprising: mounting the optical element in an optical mount having a plurality of fiducials overlapping with the optical element; obtaining a first metrology map for the optical element and the plurality of fiducials; obtaining a second metrology map for the optical element without the plurality of fiducials; forming a difference map between the first metrology map and the second metrology map; aligning the first metrology map and the second metrology map; placing mathematical fiducials onto the second metrology map using the difference map to form a third metrology map; associating the third metrology map to the optical element; mounting the optical element in a fixture in an MRF tool; positioning the optical element in the fixture; removing the plurality of fiducials; and finishing the optical element.