Method of producing antireflective coatings on acrylic glasses, optical bodies produced by this method and the use of such optical bodies
US4161560A · kind A · utility
20Cited by
4References
7Claims
0Family size
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Inventor
Key dates
| Filing date | Dec 21, 1977 |
| Grant date | Jul 17, 1979 |
| Priority date | — |
| Expiry date | Dec 21, 1997 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31935
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
An optical body and a method of producing same comprising a transparent plastic substrate composed of an acrylate, preferably polymethylmethacrylate, depositing a first coat having a high refraction index on the substrate by vaporizing an oxide mixture of substantially zirconium dioxide with a content of 4 to 15 percent weight percent of aluminum oxide and depositing a second coat having a low refractive index by devaporization in a vacuum of a borosilicate glass containing less than 5 weight-percent of alkali metal oxides. The application of at least the first coat is performed in an oxidizing residual gas atmosphere.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.