Distance Measurement Using a Pulse Train Emitted from a Laser Diode
Distance Measurement Using a Pulse Train Emitted from a Laser Diode
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使用激光二极管发射的脉冲序列进行距离测量
DOI：
10.1143/jjap.26.l1690
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发表时间：
1987
影响因子：
1.5
通讯作者：
Tadanao Ohishi
中科院分区：
文献类型：
--
作者：
K. Seta;Tadanao Ohishi
使用激光二极管发射的脉冲序列开发了测距仪。脉冲串的频谱由提供给激光二极管的调制电流的基频及其谐波组成。通过二次谐波的外差检测，消除了由调制电流引起的检测信号与漏磁之间的干扰效应，并减少了相位测量中由这种干扰效应引起的系统误差。提高了距离测量的精度，特别是当检测到的光信号很弱时。
A distance meter has been developed using a pulse train emitted from a laser diode. The frequency spectrum of the pulse train consists of the fundamental frequency and its harmonics of the modulation current supplied to the laser diode. The interference effect between the detected signal and the field leakage, induced by the modulation current, was removed through the heterodyne detection of the second harmonic, and the systematic error caused from this interference effect was decreased in phase measurements. The precision of the distance measurement was improved, especially when the detected light signal was very weak.