TONER PATCH SENSOR WITH INTEGRATING OPTICAL COLLECTION GEOMETRY

• Main Authors: ROUTT, JR., WILSON, MORGAN, DENTON, GARY, ALLEN
• Format: Patent
• Language: English; French
• Published: 10.05.2002
• Edition: 7
• Subjects: CINEMATOGRAPHY; ELECTROGRAPHY; ELECTROPHOTOGRAPHY; HOLOGRAPHY; INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES; MAGNETOGRAPHY; MEASURING; PHOTOGRAPHY; PHYSICS; TESTING

A toner patch sensor (14) arrangement in an electrophotographic machine includes a substantially hollow chamber (12) having a reflective interior surface, a first opening exposing a toner patch, a second opening and a third opening. A light emitting element (16) emits light onto the toner patch through the first opening and the second opening. A light detecting element receives through the third opening light reflected off the toner patch such that the reflected light is received only after the light has also reflected off the interior surface of the chamber. A toner patch sensor arrangement in an electrophotographic machine includes a substantially hollow chamber having a reflective ingerior surface, a first opening exposing a toner patch, a second opening and a third opening. A light emitting element emits light onto the toner patch through the first opening and the second opening. A light detecting element receives through the third opening light reflected off of the toner patch such that the reflected light is received only after the light has also reflected off the interior surface of the chamber. L'invention concerne un arrangement de capteur de plage de toner, dans une machine électrophotographique, comprenant une chambre sensiblement creuse comportant une surface intérieure réfléchissante, une première ouverture donnant sur une plage de toner, ainsi que des deuxième et troisième ouvertures. Un élément émetteur de rayonnement lumineux émet, à travers les première et deuxième ouvertures, un rayonnement sur la plage de toner. Un élément détecteur de rayonnement lumineux reçoit, à travers la troisième ouverture, le rayonnement réfléchi par la plage de toner de telle façon que ce rayonnement réfléchi soit reçu seulement après que le rayonnement soit aussi réfléchi par la surface intérieure de la chambre.