Approximately what is the wavelength of the laser light used in LIDAR speed measurements?

The wavelength of the laser light used in LIDAR (Light Detection and Ranging) speed measurements is typically around 904 nm. This wavelength is in the infrared range of the electromagnetic spectrum, which allows for effective penetration of atmospheric conditions, such as fog or rain, providing reliable distance and speed measurements.

Using 904 nm laser light enhances the system's performance because it minimizes reflection and scattering, leading to more accurate readings. Furthermore, this wavelength is commonly employed in various LIDAR applications, including automotive lidar systems, which rely on precise speed and distance measurements for functions like adaptive cruise control and collision avoidance.

Understanding the significance of this wavelength helps in recognizing the capabilities and limitations of LIDAR technology in speed detection and other applications.