Fabrication of precision optics using an imbedded reference...

Details Fabrication of precision optics using an imbedded reference... Fabrication of precision optics using an imbedded reference...

2005-02-01

2005-02-01

Allen, Stephone B. (Department: 2878)

Radiant energy

Photocells; circuits and apparatus

With circuit for evaluating a web, strand, strip, or sheet

C250S559280, C356S630000, C216S060000, C438S016000, C438S746000

Reexamination Certificate

active

06849859

ABSTRACT:
The figure of a substrate is very precisely measured and a figured-correcting layer is provided on the substrate. The thickness of the figure-correcting layer is locally measured and compared to the first measurement. The local measurement of the figure-correcting layer is accomplished through a variety of methods, including interferometry and fluorescence or ultrasound measurements. Adjustments in the thickness of the figure-correcting layer are made until the top of the figure-correcting layer matches a desired figure specification.

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patent: 6261152 (2001-07-01), Aiyer

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