Embedded fiducials in optical surfaces
Patent
·
OSTI ID:20013922
Embedded fiducials are provided in optical surfaces and a method for embedding the fiducials. Fiducials, or marks on a surface, are important for optical fabrication and alignment, particularly when individual optical elements are aspheres. Fiducials are used during the course of the polishing process to connect interferometric data, and the equation describing the asphere, to physical points on the optic. By embedding fiducials below the surface of the optic and slightly outside the clear aperture of the optic, the fiducials are not removed by polishing, do not interfere with the polishing process, and do not affect the performance of the finished optic.
- Sponsoring Organization:
- US Department of Energy
- DOE Contract Number:
- W-7405-ENG-48
- OSTI ID:
- 20013922
- Country of Publication:
- United States
- Language:
- English
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