DE2912848

The invention relates to the measurement of the shade of a particle. The particle is illuminated with light of variable intensity and viewed against a background level of illumination. A measurement is made of the ratio of time for which the intensity of light from the particle exceeds the intensity...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	CHATTERLEY, SAMUEL, FLORIDA LAKE, TRANSVAAL, ZA, GROBBELAAR, JACOBUS HERMANUS, ALBERTON, TRANSVAAL, ZA, COLSON, RICHARD NEVILLE, KEMPTON PARK, TRANSVAAL, ZA, LEVITT, CHARLIE MAURICE, VICTORIA PARK, TRANSVAAL, ZA
Format:	Patent
Sprache:	eng
Schlagworte:	INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES MEASURING PERFORMING OPERATIONS PHYSICS POSTAL SORTING SEPARATING SOLIDS FROM SOLIDS SORTING SORTING INDIVIDUAL ARTICLES, OR BULK MATERIAL FIT TO BE SORTEDPIECE-MEAL, e.g. BY PICKING TESTING TRANSPORTING
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Beschreibung
Zusammenfassung:	The invention relates to the measurement of the shade of a particle. The particle is illuminated with light of variable intensity and viewed against a background level of illumination. A measurement is made of the ratio of time for which the intensity of light from the particle exceeds the intensity of the background to obtain a measurement of the shade of the particle.