Rapid Optical Ranging Technique

The proposed optical ranging technique called LT-PAM (Long-Term Phase Accordance Method) transmits multiple sync patterns composed of two sinusoidal waves with different frequencies. Unlike chirp modulation techniques, LT-PAM transmits the two waves simultaneously and thus enables the shortening of measurement time. We have conducted experiments using two types of light sources, collimated and diffused light.
The experimental results indicated that the proposed method showed a moderate level of accuracy by adjusting the measurement time.