| 摘要 |
<p>PURPOSE:To provide a bi-directional infrared ray detector with a high infrared ray detection accuracy within the detection region of the infrared ray detector. CONSTITUTION:The title detector consists of a Fresnel lens 3 provided on the front surface of a body case 1, a pair of infrared ray sensors 6, 6 provided on a substrate 4 which is fixed inside the body case 1 opposite to the Fresnel lens 3, and a control circuit 10 which is located inside the body case 1 and controls load by receiving the output of both infrared ray sensors and the Fresnel lens 3 is divided into left and right regions 3L and 3R and two focus centers 3b, 3b where a line connecting the centers is laid out skewly are provided in the regions 3L and 3R, respectively.</p> |
