Laser signal processing technology: a coaxial laser ranging module of light detection and ranging device

• The world's first consumer-grade coaxial laser ranging module. • The blind area of coaxial laser ranging systems has been reduced to 0.5 m. • The laser ranging module has the advantages of low price, light weight, simple structure and small size. Light Detection and Ranging (LiDAR) devices are essential components in the fields of autonomous driving and drone environmental perception. Theoretically, coaxial laser ranging systems of LiDAR offer significant advantages, including high precision, lightweight design, and cost-effectiveness. However, practical applications have shown that coaxial systems often face challenges such as low energy utilization and suboptimal signal-to-noise ratios. In our previous work, we addressed the issue of energy efficiency. In this study, we successfully completed the trial production of consumer modules. By taking advantage of the characteristics of the laser beam within the optical system, we improved the signal-to-noise ratio through advanced photoelectric filtering techniques applied to the detector. Experimental results indicate that, without any algorithmic optimization of the original signal, the blind area of the laser ranging system has been reduced to 0.5 meters. This approach represents a cost-effective and efficient way to improve the performance of coaxial laser ranging devices.