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US 2003/0110810 A1Published application
Index modulation in glass using a femtosecond laser
Assignee3M Innovative Properties Company
InventorsDouglas Scott Dunn, Jeffrey Michael Florczak, Jeffrey Bruce Hill, Harvey William Kalweit
Life of this patent
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Abstract
The invention relates to inducing a refractive index change in the glass substrate of a polymer coated optical device by using a high numeric aperture lens to focus a femtosecond laser beam through the polymeric coating to the substrate without damaging the polymeric coating.
Claims18
A method of making an optical device comprising:
- selecting a glass substrate having a protective polymeric coating, and focusing a femtosecond laser beam with a high numerical aperture lens through the polymeric coating and to a point in the substrate to induce a refractive index change in the substrate without damaging the polymeric coating.
An optical device comprising:
- A glass substrate having a protective polymeric coating wherein at least one area in or on the substrate has a changed refractive index, which change was made while the protective polymeric layer was on the substrate.
Dependencies are inferred from the claim text.