| 摘要 |
<p>An opto-electronic device for detecting a beam of radiation and determining the angle-of arrival of that beam with a high degree of angular resolution has a linear array of radiation detectors (8) arranged in a plane with a shadow mask (2) located at a predetermined height h above and parallel to that plane, wherein the shadow mask (2) has a plurality of transparent apertures (6) separated by opaque areas (4). Each radiation detector (8) in the array comprises at least one pair of adjacent individual detector elements and apertures (6) of the shadow mask, which apertures (6) have the same width as the detector elements (8), are centred directly above the area between adjacent detector elements. Signals generated by corresponding detector elements (8) in each radiation detector are supplied, in parallel, to one channel, providing a number of output channels (A,B) that corresponding to the number of individual detector elements (8) in each radiation detector. The angle-of-arrival of a radiation beam emitted by a source and traversing the apertures (6) can then be determined by output signals from the channels (A, B). This radiation beam detecting device is particularly designed for use in Laser Warning Receivers which detect, identify and locate laser sources associated with laser guided weapons. <IMAGE></p> |
