Embedded fiducials in optical surfaces

Details Embedded fiducials in optical surfaces Embedded fiducials in optical surfaces

1998-10-16

2000-01-11

Epps, Georgia

Optical: systems and elements

Lens

356401, 430 5, 430 22, 430321, 430322, G02B 300, H04N 100

Patent

active

060142642

ABSTRACT:
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.

REFERENCES:
patent: 5062701 (1991-11-01), Drazba

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