| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a projector capable of preventing deterioration of its reliability. <P>SOLUTION: A projector includes: an external case provided with an opening through which light can pass; a projection optical system disposed within an inside space of the external case, in which the projection optical system includes a reflection member having a reflection surface capable of reflecting light received from a light source device to guide the light toward the opening, and emits the light to the outside of the external case via the opening; and a detection unit which detects a foreign material existing on the optical path of the light on the light emission side of the opening. <P>COPYRIGHT: (C)2013,JPO&INPIT |
