Antireflection coating for potassium chloride
US4533593A · kind A · utility
7Cited by
7References
2Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 16, 1983 |
| Grant date | Aug 6, 1985 |
| Priority date | — |
| Expiry date | Sep 16, 2003 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/265
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
An antireflection coating for a potassium chloride substrate has a first arsenic trisulfide (As.sub.2 S.sub.3) layer, a lead fluoride (PbF.sub.2) layer and a second arsenic trisulfide (As.sub.2 S.sub.3) layer which are formed on at least one major surface of the potassium chloride (KCl) substrate in the order named. The antireflection coating withstands to irradiate of a high-power carbon dioxide gas laser. The antireflection coating also has good optical characteristics and moisture resistance.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.