What is the wavelength of light used in LIDAR?

The wavelength of light used in LIDAR systems is typically around 904 nanometers. This specific wavelength falls within the near-infrared region of the electromagnetic spectrum. LIDAR, or Light Detection and Ranging, uses lasers to emit pulses of light that measure the time it takes for the light to bounce back after hitting an object. The choice of 904 nanometers is particularly important because it allows for effective penetration of atmospheric conditions such as fog and rain, while maximizing the detection capability for various surfaces. This wavelength is also compatible with sensitive detectors and provides a favorable balance between energy efficiency and measurement accuracy, which is critical for applications like speed detection.