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    • 7. 发明公开
    • Sun optical limitation illumination detector
    • Beleuchtungssensor mit optischer Begrenzung des Sonnenlichts
    • EP1160549A2
    • 2001-12-05
    • EP01201225.8
    • 2001-04-04
    • THE MINISTER OF NATIONAL DEFENCE OF HER MAJESTY'S CANADIAN GOVERNMENT
    • Dubois, Jacques
    • G01J1/04G01J1/42
    • G01J1/04G01J1/0488G01J1/42G01J1/50G01J3/0213G01J3/0229G01J2001/0276G01S3/7803G01S3/781G01S3/784G01S7/4804
    • A device for detecting laser beams where high levels of light from an extraneous source may be present in one area of the device's field-of-view. The device has a lens (3) to focus an image of the field-of-view onto a surface of a photodetector (1) and an optical limiter (2) is located between the lens (3) and the photodetector (1). The optical limiter (2) limits transmission of the light received from the extraneous source at areas of the optical limiter (2) onto which the light is focussed by the lens (3) but remains transmissive to the laser beams and light received from other areas. The device is particularly intended for use in laser warning receivers where sunlight (S) may be focussed on the optical limiter (2) and blocked at the particular area (5) of the optical limiter (2) onto which it is focussed. The optical limiter (2) does not block laser beams allowing them to be detected by the photodetector.
      An imaging system using the same optical arrangement can also be used in video cameras to specifically attenuate the effects of the sun on a charge coupled device (CCD) image sensor.
    • 用于检测激光束的装置,其中来自外来源的高水平光可能存在于装置的视场的一个区域中。 该装置具有将视野图像聚焦到光电检测器(1)的表面上的透镜(3),并且光学限制器(2)位于透镜(3)和光电检测器(1)之间。 光限制器(2)限制在光限制器(2)处接收到的来自外来源的光的透射,光限制器(2)上的光被透镜(3)聚焦,但是保持对激光束的透射和从其它区域接收的光 。 该装置特别用于激光警告接收器,其中太阳光(S)可以被聚焦在光学限制器(2)上并被阻挡在其被聚焦在其上的光学限制器(2)的特定区域(5)上。 光限制器(2)不会阻挡激光束,使得它们被光检测器检测到。 使用相同光学布置的成像系统也可用于摄像机中以特别地衰减太阳对电荷耦合器件(CCD)图像传感器的影响。