| 摘要 |
PROBLEM TO BE SOLVED: To solve the problem in which: since a conventional optical sensor determines an object and its brand by referring to a recording sheet determination table including the size of reflection light to be received measured in advance as representative values of respective brands, an incident angle needs to be easily and accurately set, but an error in the incident angle is not taken into consideration.SOLUTION: An optical sensor of the present invention comprises: an irradiation part that irradiates a surface of an object with light having an angle with respect to a normal line of the surface and can change the angle; and a light detection part that detects light emitted from the irradiation part and reflected on the object and outputs a signal, and sets the angle on the basis of the signal output from the light detection part.SELECTED DRAWING: Figure 2 |
