Method for creating an optical structure within a photosensitive light transmissive material and of enhancing the photosensitivity of the photosensitive light transmissive material
US6706455B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 3, 2002 |
| Grant date | Mar 16, 2004 |
| Priority date | — |
| Expiry date | Jan 3, 2022 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC03C25/6226
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A method of creating an optical structure within a photosensitive light transmissive material comprising the steps of: (a) exposing a selected region of the material to radiation at a wavelength selected to effect a refractive index change in the material; (b) terminating the exposure to the radiation at a selected fluence; and afterwards (c) exposing at least one portion of the selected region to UV radiation at a level sufficient to vary the refractive index of the material within the selected region to form the optical structure; wherein the fluence is selected such that the optical structure is substantially thermally stable without a requirement for post-processing annealing.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.