Introduction

Laser ranging technology is a non-contact distance measurement technology with strong anti-interference ability,which has fast response speed and high measurement accuracy. It is widely used in military, aerospace and industrial applications. This experimental system selects three commonly used ranging methods for study respectively: laser pulse ranging, laser phase ranging and trigonometric ranging. It can help students deeply understand different ranging principles and their application scenarios. What’s more, students are able to compare the measurement accuracy, measurement distance, measurement error and other characteristics of different distance measurement methods.

Experiments

a)Laser pulse ranging experiment

Microchip laser characteristic testing experiment;

Detector characteristics and waveform rising edge observation experiments;

Pulse ranging optical path and blind zone detection experiment;

Laser pulse ranging experiment based on oscilloscope;

Laser pulse ranging experiment based on time-to-digital converter;

Time-to-digital converter experiment with continuous acquisition mode.

b)Phase ranging experiment

Experiments on high-speed modulation of semiconductor lasers and measurement of photodetector response characteristics;

Phase ranging experiment based on oscilloscope direct reading method;

Phase ranging experiment based on lock-in amplification algorithm;

Multi-scale phase ranging experiment.

c)Trigonometry distance measurement experiment

Scheimpflug conditional light path construction experiment;

Ranging system calibration experiment;

Experimental Knowledge

Laser pulse ranging, time-to-digital converter, phase ranging, multi-foot measurement, phase detection, trigonometric ranging, Scheimpflug conditions, fast photoelectric detector, area array detector

Typical Testing

            Ranging Pulse Echo Signal                               Avalanche Photodiode APD

                    Microchip Laser                                                  Laser Beam Expander