Glass lens blank for polishing, manufacturing method therefore, and optical lens manufacturing method
US9868661B2 · kind B2 · utility
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17Claims
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Key dates
| Filing date | Feb 25, 2014 |
| Grant date | Jan 16, 2018 |
| Priority date | — |
| Expiry date | Aug 22, 2034 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P40/57
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A glass lens blank for polishing in which a thickness of a defect-containing layer is suppressed to a minimum and thus it is possible to shorten the processing time required for grinding and polishing the glass lens blank for polishing after press-molding, a method of manufacturing the same, and a method of manufacturing an optical lens. A glass lens blank for polishing of which at least a main surface is a press-molding surface, wherein a defect-containing layer formed on the main surface has a thickness of 50 μm or less.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.