Night vision device with antireflection coating on cathode window
US6667472B2 · kind B2 · utility
4Cited by
9References
2Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 20, 2001 |
| Grant date | Dec 23, 2003 |
| Priority date | — |
| Expiry date | Jan 21, 2022 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01J31/50
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An image intensifier tube which obviates problems with stray reflections caused by bright lights utilizes an antireflection coating in the form of an interference filter on the cathode window. An image intensifier—which is protected against laser damage utilizes a laser reflecting coating on the cathode window. The image intensifier is disposed between an optical input element and an optical utilization element. The cathode window is a glass plate having a photocathode on the side away from the optical input element and an antireflection or laser reflecting coating on the side which faces the optical input element.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.