Method of producing antireflective coatings on polydiethyleneglycoldiallylcarbonate, an optical product made by the method, and the use of the optical product
US4161547A · kind A · utility
20Cited by
5References
6Claims
0Family size
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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 primaryY10T428/31507
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
An optical body and a method of producing oxidic, antireflective coatings on transparent plastic substrates of polydiethyleneglycoldiallylcarbonate comprising depositing a first coating having a high refractive index by vaporizing an oxide mixture of essentially zirconium dioxide with a content of 4 to 15 weight percent of aluminum trioxide and depositing a second layer having a low refractive index by vaporizing in a vacuum a borosilicate glass containing less than 5 weight-percent of alkali metal oxides. The depositing of at least the first coating is performed in an oxidizing residual gas atmosphere.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.