Overcoat method and apparatus for ZRO.sub.2 mirror stacks
US5646780A · kind A · utility
10Cited by
9References
14Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 3, 1996 |
| Grant date | Jul 8, 1997 |
| Priority date | — |
| Expiry date | Jun 3, 2016 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B5/0833
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A mirror for a ring laser gyro includes alternating optical quarterwave regions of SiO.sub.2 and ZrO.sub.2, and of admixtures of these. The alternating regions have thicknesses suitable for reflecting a laser beam in a ring laser gyro. A final coating of ZrO.sub.2 and SiO.sub.2, and of admixtures of these, is constructed so as to be made substantially of ZrO.sub.2 at a bottom portion and so as to have gradually increasing SiO.sub.2 content so that the top surface comprises substantially pure SiO.sub.2 material.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.