Laser Range Finder (LRF) modules are critical subsystems in surveillance, defense, industrial automation, mapping, and navigation solutions. Their performance is decided by their maximum range along with a combination of optical, environmental, and signal-processing factors. Understanding these parameters is essential when selecting the right LRF module for a specific application.
Let’s see what parameters are used to select an LRF module and explains how wavelength choice, environmental conditions, optical aberrations, and signal-to-noise ratio (SNR) directly influence performance.
LRF module
An LRF module is used to determine distance. They do so by emitting a laser pulse toward a target and measuring the time taken for the reflected signal to return. The accuracy and reliability of this measurement depend on how efficiently the transmitted signal reaches the target and how clearly the return signal is detected against background noise.
While LRF module is useful in measurements, their selection depends on certain parameters:
Range and accuracy
The rated range of an LRF module is typically specified for targets of a given reflectivity and size. Accuracy defines how closely the measured distance matches the actual distance and is usually expressed in meters or centimeters.
An ideal choice is a module with a range margin beyond your operational requirement to account for atmospheric losses and low-reflectivity targets.
Wavelength selection
The operating wavelength is one of the most critical parameters in LRF performance.wavelengths impact the performance and capabilities. For instance, 1535–1550 nm range offers eye-safety, long-range, superior atmospheric performance.
Signal-to-Noise Ratio (SNR)
SNR determines how clearly the reflected signal can be distinguished from background noise.High SNR enables reliable ranging at longer distances and on low-reflectivity targets.
Selecting the right LRF module requires a system-level understanding of optical physics, environmental behavior, and signal processing. However, it becomes simple with a laser expert like ERDI Tech that can help develop custom laser products for specific applications.