Measurements performed using the self‐coupling effect of a semiconductor laser utilize an external resonator by exploiting the reflected light from the surface of an object. The improvement of the measurement accuracy due to the use of self‐coupled signals acquired from terminal voltages has not been thoroughly investigated. The current that flows through a semiconductor laser is adjusted so that its wavelength changes at a specific rate when it is modulated using an arbitrary waveform. As such, the spread of the self‐coupled signal is suppressed, and precision is improved. In addition, the accuracy is improved by considering the influence of lenses on the optical path.

中文翻译：

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端电压自耦合激光距离传感器的精度提高

利用半导体激光器的自耦合效应进行的测量利用外部谐振器，该外部谐振器利用了物体表面的反射光。由于未使用从端子电压获取的自耦合信号，因此提高了测量精度尚未得到充分研究。调整流经半导体激光器的电流，以便在使用任意波形进行调制时，其波长以特定的速率变化。这样，可以抑制自耦合信号的扩展，并提高精度。另外，通过考虑透镜对光路的影响来提高精度。