Corona detector with narrow-band optical filter
US6150652A · kind A · utility
6Cited by
2References
14Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Mar 3, 1999 |
| Grant date | Nov 21, 2000 |
| Priority date | — |
| Expiry date | Mar 3, 2019 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B23/12
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A corona detector for detecting a corona associated with a remote object. In one embodiment, the corona detector employs an optical filter having at least one passband centered at a wavelength corresponding with one of the molecular nitrogen emission spectrum second positive emission lines in the visible spectrum for filtering light from the remote object. A lens operatively coupled to the optical filter forms an image of the remote object, the lens having high transmissivity in the visible spectrum.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.