automatic traffic signal light 自动红绿灯 ; 主动红绿灯 ; 荫 ; 疁
Directional signal light 方向信号灯 ; 方向旌旗灯号灯
rescue signal light 救难信号灯 ; 救生火焰 ; 救生火号
parking signal light 驻停信号灯
propeller warning signal light 螺桨警示灯
red signal light 红灯光 ; 红光信号 ; 红光信号红光红灯光
Morse signal light 莫氏信号灯 ; 莫氏灯 ; 莫尔斯信号灯
flash signal light 闪光信号灯
braking signal light 制动信号灯
Balanced heterodyne reception is more sensitive than the traditional unit heterodyne detection, with higher signal-to-noise ratio and more effective use of energy of signal light and local oscillation light.
平衡外差接收方式比传统单元外差探测更加灵敏,信噪比更高,更能有效地利用信号光和本振光的能量。
参考来源 - 平衡式外差接收及随机共振微弱信号检测·2,447,543篇论文数据，部分数据来源于NoteExpress
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