Optical glass and optical product using the same
US6995101B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 29, 2001 |
| Grant date | Feb 7, 2006 |
| Priority date | — |
| Expiry date | Jun 29, 2021 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC03C3/21
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
An optical glass having a high refractive index and high dispersion characteristics suitable for application to precision press molding to precisely mold final products without requiring grinding or polishing. An optical glass can be prepared exhibiting a refractive index in the range of from 1.75 to 2.0, and an Abbé number in the range of from 20 to 28.5. Optical parts comprised of this glass; press-molding materials comprised of this glass; methods of manufacturing the same; and methods of manufacturing molded glass products employing these materials. A suitable optical glass is composed of the following in molar percent: 15–30% P2O5; 0.5–15% B2O3; 5–25% Nb2O5; 6–40% WO3; 4–45% of at least one of Li2O, Na2O or K2O; 1–5% K2O; 2–9% TiO2; and 0–30% (excluding 30%) of at least one RO selected from among BaO, ZnO, and SrO; with the total content of the above-stated components being equal to or more than 95 percent.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.