Fig. 1. Schematic diagram of simple frequency scanning interferometry laser ranging system

Fig. 2. Nonlinear frequency scanning interferometry measurement error. (a) Laser frequency curves; (b) spectrogram of beat frequency signal

Fig. 3. Schematic diagram of frequency scanning interferometry laser ranging system using equal optical frequency interval sampling technology

Fig. 4. Equidistant optical frequency interval resampling simulation results. (a) Frequency scanning curves; (b) target distance; (c) signal spectrum

Fig. 5. Schematic diagram of dual-channel synchronous reverse frequency scanning interferometry laser ranging system

Fig. 6. Doppler frequency shift error correction simulation result

Fig. 7. Schematic diagram of frequency scanning interferometry laser ranging system with modular design

Fig. 8. Engineering prototype of frequency scanning interferometry laser ranging system

Fig. 9. Doppler frequency shift error calibration and correction. (a) Error scatter plot; (b) error curve graph

Fig. 10. Results of frequency scanning interferometr laser ranging experiments. (a) Measured mean; (b) linearity error; (c) repeatability standard deviation