Antiglare optical device
US6674587B2 · kind B2 · utility
12Cited by
5References
30Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 30, 2001 |
| Grant date | Jan 6, 2004 |
| Priority date | — |
| Expiry date | Jun 12, 2021 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC03C2218/365
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
The present invention relates to a method of deposition of an absorbing material upon a plastic/glass substrate by vacuum coating at an angle of inclination between 5° to 30° and using a mask on the evaporation source to produce a graded film material and a method for the preparation of graded density absorbing film useful as an antiglare optical device for protecting the eyes by reducing the glare by absorbing the light intensity falling upon it in a non-uniform fashion.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.