1 . At the receiving end, a photodetector converts them back to electrical signals.
在接收端, 由光电探测器再把光脉冲信号转换成电信号.
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2 . The receiver includes the choice of photoelectric detector and receiving circuit.
接收部分针对光电探测器和接收电路的选择展开论述.
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3 . Photodetectors are transducers that convert light into an electric signal.
光电探测器是将光转化成电信号的变换器.
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4 . Pt - GaAs Schottky barrier APDs have been investigated.
Pt-GaAs肖特基势垒雪崩光电探测器已研制成功.
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5 . The frequency difference is detected by a photo - electric detector and countered by a frequency meter.
频差由光电探测器检测,其大小由频率计读出.
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1.photodetector
光电探测器是指由辐射引起被照射材料电导率改变的一种物理现象。光电探测器在军事和国民经济的各个领域有广泛用途。在可见光或近红外波段主要用于射线测量和探测、工业自动控制、光度计量等；在红外波段主要用于导弹制导、红外热成像、红外遥感等方面。光电导体的另一应用是用它做摄像管靶面。为了避免光生载流子扩散引起图像模糊，连续薄膜靶面都用高阻多晶材料，如PbS-PbO、Sb2S3等。其他材料可采取镶嵌靶面的方法，整个靶面由约10万个单独探测器组成。
