Corona detector with narrow-band optical filter

Details Corona detector with narrow-band optical filter Corona detector with narrow-band optical filter

1997-07-10

1999-03-23

Le, Que T.

Radiant energy

Photocells; circuits and apparatus

Photocell controlled circuit

250226, H01J 4014

Patent

active

058863443

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 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 ultraviolet spectrum.

REFERENCES:
patent: 5288992 (1994-02-01), Fohl

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