Method and system for processing optical elements using magnetorheological finishing
US8271120B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 14, 2010 |
| Grant date | Sep 18, 2012 |
| Priority date | — |
| Expiry date | Apr 9, 2031 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB24B51/00
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A method of finishing an optical element includes mounting the optical element in an optical mount having a plurality of fiducials overlapping with the optical element and obtaining a first metrology map for the optical element and the plurality of fiducials. The method also includes 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, and aligning the first metrology map and the second metrology map. The method further includes placing mathematical fiducials onto the second metrology map using the difference map to form a third metrology map and associating the third metrology map to the optical element. Moreover, the method includes mounting the optical element in the fixture in an MRF tool, positioning the optical element in the fixture; removing the plurality of fiducials, and finishing the optical element.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.