By Perry J Zucker
Radar uses a radio signal (wave) to determine the speed of a targeted object, such as a vehicle. The signal have different characteristics e.g. beam lengths and widths. The beam hits the target and reflects back to the radar device’s with a change in frequency and time, which is better known as the “Doppler Shift”.
Laser – LIDAR
Laser – LIDAR uses an infrared light, which is in the invisible end of the light spectrum. In the complete lidar / laser device may have different beam lengths, widths and pulses.
Accuracy of: Radar , Laser / Lidar
Each speed measuring device has inherent advantages, and disadvantages, but the key to accuracy is proper operation of the key device.
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