Underlying Principles And Lidar Fundamentals; Key Factors For Best Sensor Performance; Fig. 1: Time Of Flight; Table 4: Key Factors For Best Sensor Performance - Leddar T16 User Manual

2.2.

Underlying Principles and LiDAR Fundamentals

Created by LeddarTech, Leddar™ (light-emitting diode detection and ranging) is a unique sensing
technology based on the LED illumination (infrared spectrum) and the principle of a light's time of flight. The
LED emitters illuminate the area of interest. The multi-segment sensor receiver collects the backscattered
light and measures the time taken for the light to return to the sensor.
A photodetector array is used and provides multiple detections and ranging segments. Full-waveform
analysis enables the detection and distance measurement of multiple objects in each segment, as illustrated
in Fig. 1 below, provided that foreground objects do not fully obscure objects behind them.
2.3.

Key Factors for Best Sensor Performance

To obtain the best operating performance, the following factors are important to consider.
Key Factor
Size of the target
Reflectivity of the target
Position of the target
within the FoV
Direct sunlight
54A0043_V4.0_EN / Leddar T16 – User Guide

Fig. 1: Time of flight

Table 4: Key factors for best sensor performance

The larger the target, the longer the range.
The smaller the target, the shorter the range.
The range increases with the target's reflectivity at the emission
wavelength.
With centered segments, the range is higher.
With outer segments, the range is lower.
Exposing the sensor to direct sunlight may affect performance levels of
the illuminated portion of the FoV, which may be caused by direct
sunlight.
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