公开(公告)号：US20040129885A1

公开(公告)日：2004-07-08

申请号：US10702117

申请日：2003-11-04

Applicant: HONEYWELL INTERNATIONAL, INC.

Inventor： David I. McKenney

IPC: G01J005/02

CPC classification number: G08B13/193 ,  G01J5/08 ,  G02B5/10

Abstract: Apparatus and methods are described for extending the detection zone of an optical detection assembly, such as for a motion detector, along an axis without adding additional reflectors or circuitry. The optical detector within the optical detector assembly is positioned astigmatically, off-axis, in relation to an optically curved reflector from which it receives reflected radiation. Electromagnetic radiation incident on the optically curved reflector from an off-axis, astigmatic, beam area is directed to the optical detector to extend the detection area of the motion detector, or other system, along one axis when compared to on-axis detector positioning. By way of example, the optical detection assembly is configured with a pyroelectric detector positioned facing an optically curved mirror comprising a Fresnel reflector at a distance roughly equivalent to the focal length of the optically curved reflector. The resultant infrared motion detector provides an extended detection area along one axis.

Abstract translation: 描述了用于沿着轴延伸诸如用于运动检测器的光学检测组件的检测区域的装置和方法，而不添加额外的反射器或电路。 光学检测器组件内的光学检测器相对于光接收反射辐射的光学弯曲反射器被散焦，离轴定位。 从偏轴，像散光束区域入射到光学弯曲反射器上的电磁辐射被引导到光学检测器，以在与轴上探测器定位相比时沿着一个轴延伸运动检测器或其它系统的检测区域。 作为示例，光学检测组件配置有热电检测器，该热电检测器定位成面向光学曲面镜，其包括与光学弯曲反射器的焦距大致相等的菲涅尔反射器。 所得的红外线运动检测器沿着一个轴提供扩展的检测区域。