Abstract An electro-optical sensor operative in the middle ultra-violet (UV) regionf the electro-magnetic spectrum, and more specifically in the so called "solar blind" region, for the long range detection of flames and artificial light sources. The sensor has a signal sensitivity of a single photon per second and includes an optical filter and an electro-optical detector, such as a photomultiplier, arranged in cascade so that the overall outband response of the sensor satisfies the equation: F*D=K/A, wherein: K is the order of magnitude of 10 -17 , F is the average filter transmittance outside the solar blind region; D is the average detector responsitivity outside the solar blind region; and A is the sensor aperture area (in cm 2 ).
Inventors
👤 Eli Talmore
👤 Ami B. Shalom
Bibliographic Details
Application Number—
JurisdictionUS
Data Sourcegoogle_patents
Last Synchronized2026-10-30 09:23
CPC Classifications
G; G01; G01J; G01J1/00; G01J1/42; G01J1/429
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
81 words
An electro-optical sensor, for the middle ultra-violet comprising, in combination, an optical filter and an electro-optical detector arranged in cascade characterised by the overall outband response of the sensor (as hereinbefore defined) satisfying the equation: F*D=K/A, wherein: K is in the order of magnitude of 10 -17 ; F is the average filter transmittance outside the solar blind region; D is the average detector responsivity outside the solar blind region; and A is the sensor aperture area (in cm 2 ).
Claim 2
Dependent Claim
81 words
An electro-optical sensor, for the middle ultra-violet comprising, in combination, an optical filter and an electro-optical detector arranged in cascade characterised by the overall outband response of the sensor (as hereinbefore defined) satisfying the equation: F*D=K/A, wherein: K is in the order of magnitude of 10 -17 ; F is the average filter transmittance outside the solar blind region; D is the average detector responsivity outside the solar blind region; and A is the sensor aperture area (in cm 2 ).
Claim 3
Dependent Claim
16 words
A sensor as claimed in claim 1 further comprising a voltage divider coupled to a preamplifier.
Claim 4
Dependent Claim
20 words
A sensor as claimed in claim 2 further comprising an RF, electrostatic and magnetic shield surrounding the filter and detector.
Claim 5
Dependent Claim
18 words
A sensor as claimed in claim 3 comprising an UV quartz lens for focusing radiation onto the filter.