TONER CONCENTRATION SENSOR, IMAGE FORMING DEVICE, AND TONER CONCENTRATION SENSOR DESIGN METHOD

摘要

PROBLEM TO BE SOLVED: To obtain a toner concentration sensor having an aperture with a diameter allowing excellent accuracy in detecting a toner concentration, and an image forming device, as well as a method of designing the toner concentration sensor.;SOLUTION: A diaphragm 52 is placed between a light source 51 and a beam splitter 53. An aperture is formed in the diaphragm 52. The aperture has a diameter D specified based on an incident angle corresponding to desired transmittance considering transmittance characteristics of the beam splitter 53 regarding the incident angle.;COPYRIGHT: (C)2012,JPO&INPIT