Patent ID: 7149441
Filing Date: 2006-12-12
Classification: G03G

Abstract:
1. A recording material discrimination device comprising: a first irradiating portion; a second irradiating portion; a sensor for receiving a light from the first irradiating portion and the second irradiating portion; a discrimination portion for discriminating a kind of said recording material based on a first attribute of said recording material and a second attribute of said recording material, the first attribute being detected based on a light irradiated by said first irradiating portion, reflected from the surface of said recording material, and received by said sensor, and the second attribute being detected based on a light irradiated by said second irradiating portion, transmitted through said recording material, and received by said sensor; and a control portion for controlling an irradiation operation of said first irradiating portion and said second irradiating portion such that either said first irradiating portion or said second irradiating portion selectively irradiates a light after said second irradiating portion irradiates a light.