| 摘要 |
PROBLEM TO BE SOLVED: To provide an optical sensor that can specify an object more precisely than conventional without cost increase and upsizing.SOLUTION: An optical sensor includes: a light source 11; a collimator lens 12; a light receiver 13; a polarization filter 14; a light receiver 15; a black box housing them; and other components. The light receiver 13 is disposed so as to receive a P polarization component included in internal diffusion reflection light, and the light receiver 15 is disposed so as to receive mainly surface positive reflection light. Setting is performed so that an incident angle of irradiation light onto recording paper is 80 degrees, and reflection light having a reflection angle of 70 to 80 degrees is received by the light receiver 15. In this case, the light receiver 15 can output a signal corresponding to smoothness of the recording paper with accuracy. |
