OPTICAL PARTICLE SENSOR AND SENSING METHOD

An optical particle sensor comprises at least first and second light sources of different wavelength for sequential operation. An optical detector is used to detect light from the light sources emitted or scattered by particles to be sensed. A compensation signal is also provided which is dependent...

Ausführliche Beschreibung

Gespeichert in:

Bibliographische Detailangaben
1. Verfasser:	VAN DER SLUIS, Paul
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES MEASURING PHYSICS TESTING
Online-Zugang:	Volltext bestellen
Tags:	Tag hinzufügen Keine Tags, Fügen Sie den ersten Tag hinzu!

Beschreibung
Zusammenfassung:	An optical particle sensor comprises at least first and second light sources of different wavelength for sequential operation. An optical detector is used to detect light from the light sources emitted or scattered by particles to be sensed. A compensation signal is also provided which is dependent on which light source of the optical arrangement is in use. The compensation signal means the amplifier does not need to re-settle in response to different background illumination levels associated with the different light sources. In this way, detection signals may be obtained in quick succession from different light sources.