Ultraviolet fluorescent tube life indicator

Ultraviolet fluorescent tube life indicator

A UV fluorescent tube life indicator comprises a first portion of material 3, 4 to emit a first visible radiation signal indicating the quantity of UVA radiation emitted by a UV source, and a second portion of material 5 to emit a second visible radiation signal indicating the quantity of visible ra...

Ausführliche Beschreibung

Gespeichert in:
Bibliographische Detailangaben
Hauptverfasser: DAVID WILLIAM HARMER, JOHN ALLEN BURROWS
Format: Patent
Sprache:eng
Schlagworte:
COLORIMETRY
MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT,POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRA-RED,VISIBLE OR ULTRA-VIOLET LIGHT
MEASURING
PHYSICS
RADIATION PYROMETRY
TESTING
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Beschreibung
Zusammenfassung:A UV fluorescent tube life indicator comprises a first portion of material 3, 4 to emit a first visible radiation signal indicating the quantity of UVA radiation emitted by a UV source, and a second portion of material 5 to emit a second visible radiation signal indicating the quantity of visible radiation emitted by the source. The indicator is in the form of a disc 1, having a central core comprising the first material 3, 4 and an annular ring surrounding the core comprising the second material 5. The UV fluorescent tube 2 emits both visible and UV light. Visible light 2 is partially transmitted through the diffusing material 5 but absorbed by filter material 3; UV light is transmitted by filter material 3 and causes fluorescent layer 4 to fluoresce visible light.