| 摘要 |
PROBLEM TO BE SOLVED: To reduce the number of elements while enabling to detect by each infrared ray spot light unit, in a reflecting sensor using an infrared ray. SOLUTION: In the reflecting sensor, it is assumed that the number of infrared ray emitting elements 21 are m1 in a light emitting part 20 side, the dividing ratio of a first lens system 22 of the light emitting system side are n1, the number of infrared ray receiving elements 31 in a light receiving part 30 side are m2, and the dividing ratio of a second lens system 32 of the light receiving side are n2 (m1≠m2, n1≠n2), the relation between the number of the infrared ray emission elements 21 being m1 and the dividing ratio n1 of the first lens system 22 of the light emission side and the number of the infrared ray receiving element 31 being m2 andthe dividing ratio n2 of the second lens system 32 are made m1×n1=m2×n2. Where, if both the infrared ray emission elements 21 and the infrared ray receiving elements 31 are≥2, and in the first lens system 22 and the second lens system 32, the compound eyes of≥2 in the dividing ratio are used, each of infrared ray emission element 21 is alternatively scan driven in a prescribed order and the light receiving signal out putted from each infrared receiving element 32 is monitored individually. COPYRIGHT: (C)2009,JPO&INPIT
|
