| 摘要 |
<P>PROBLEM TO BE SOLVED: To solve such a problem that a conventional optical touch sensor has a large number of components and cannot precisely detect a position due to displacement of an optical system. <P>SOLUTION: The periphery of a detection area 2 is enclosed by an elliptical light reflection section whose inside is constituted by reflection members. A light-emitting section and a light receiving section 5 are provided at two focal points of the light reflection section or adjacent thereto. The light receiving section 5 includes an optical member 16 for focusing or guiding the light to a photoelectric transducer 14, so that, even if the light-emitting section, the light receiving section 5 and the light reflection section are displaced or deviated due to thermal expansion or the like, the photoelectric transducer 14 can precisely receive the light so as to precisely detect a commanded coordinate positions of command means inside the detection area 2. <P>COPYRIGHT: (C)2012,JPO&INPIT |
