Lidar interference with highly collimated point light sourcesSolar simulator

Lidar interference with highly collimated point light sourcesWithin the effective irradiation range, it is possible to achieve an approximate right angle to the sun and achieve1A solar constant (i.e. the intensity of sunlight under normal outdoor conditions), which can be used for headlight testing, cabin testing, ambient light testingHUDTesting and so on.

Interference caused by point light sources

Optical interference: The high brightness of the point light source directly shining on the receiving end of the laser radar may cause the photodetector at the receiving end to reach optical saturation, making it impossible to correctly receive the target reflection signal. Meanwhile, strong light may also cause optical noise, masking weak target reflection signals and reducing the detection performance of LiDAR.

Electromagnetic interference: Some point light sources generate strong electromagnetic radiation during operation, which may enter the receiving system of the laser radar, causing electromagnetic compatibility issues and affecting the normal reception and processing of laser echo signals by the receiving system, thereby interfering with the normal operation of the laser radar.

Signal confusion: When the strong signal generated by a point light source is similar to the target echo signal of a laser radar in terms of time, frequency, or space, signal processing technology is difficult to distinguish between the real target and the interference source, which can easily lead to misjudgment or omission, affecting the recognition and positioning of targets by the laser radar.

The impact of interference generated by point light sources on lidar

Shortened detection range: Due to interference from point light sources, the effective signal received by the laser radar receiver is weakened, resulting in a shorter range of targets that it can detect, which cannot meet the detection requirements for distant targets.

Reduced detection accuracy: Optical noise and signal confusion caused by point light sources can lead to errors in the measurement of target position, shape, and other information by LiDAR, resulting in a decrease in detection accuracy and affecting the accuracy of target positioning, which in turn affects subsequent decision-making and control.

Reduced system stability: Strong electromagnetic radiation and other interference may cause abnormal operation or malfunction of electronic components in the laser radar system, reducing system stability and reliability, and affecting the normal operation of the laser radar.

Main characteristics of high collimation point light source

Simulate the spectral characteristics of real sunlight;

Near the right angle of sunlight;

Approaching the uniformity of sunlight;

Good instability.

Highly collimated point light sourceSolar simulatorMain parameters

1. Effective spot size:φ200mm

2. Working distance:8m

3. Light source exit aperture:φ70mm-200mmoptional

4. Light bulb type: Xenon lamp

5. Spectral range:350-2500nmoptional

6. Quasi right angle:≥±54°

7. Light source irradiation intensity:1200W/㎡

8. Radiation instability:≤2%

9. Effective spot irradiation uniformity:≥90%

10. Range of illumination and energy regulation:50-100%

applicationThis device is used to simulate direct sunlight and directly irradiate LiDAR in the form of a point light source