MEDIUM DETECTION MECHANISM, MEDIUM DETECTION METHOD, AND PRINTING APPARATUS

摘要

PROBLEM TO BE SOLVED: To provide a medium detection mechanism with improved detection accuracy of a medium.SOLUTION: A medium detection mechanism 50 includes a medium guide 31 that holds a medium 5, and an optical sensor 51 including an irradiation section 53 that emits irradiation light to the medium guide 31, and a light receiving section 55 that receives reflected light. An amount of received light that is received by the light receiving section 55 from reflected light of external light that enters the medium guide 31 and reflected light of the irradiation light is smaller than or equal to a predetermined value.SELECTED DRAWING: Figure 3