Method of increasing strength of glass substrate for optical filter and tempered-glass optical filter made thereby
US11643361B2 · kind B2 · utility
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7Claims
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Key dates
| Filing date | Dec 24, 2019 |
| Grant date | May 9, 2023 |
| Priority date | — |
| Expiry date | May 31, 2040 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC03C2218/365
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
The present invention provides a method of increasing the strength of a glass substrate for optical filters and a tempered-glass optical filter using a tempered glass substrate manufactured using the same, in which the glass substrate for optical filters is subjected to chemical tempering so that a compressive stress (CS) and a depth of layer (DOL) of the glass substrate are adjusted to increase the bending strength thereof.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.