Recently, when a blogger was shooting a car video, he discovered that a green line appeared in the screen when approaching the lidar. The reason was that the laser burned out the device's sensor. Although the possibility of lidar and laser damage to shooting equipment is not news, Bitauto would like to remind everyone again: car lidar may cause damage to shooting equipment.

There have been many cases of camera sensors being burned before. Laser damage to the sensor is the result of a combination of factors, including laser intensity, irradiation time, spot size, wavelength, pulse length, lens used, etc.

International Laser Display Association Warning: Camera sensors are often more susceptible to damage than the human eye, depending on the distance, beam direction, and power of the laser source. Shorter laser pulses can measure distance more accurately, but they require higher power intensities, which affects camera sensors.

At the same time, some manufacturers have issued clear warnings: Do not expose the lens directly to light beams such as laser beams, as this may damage the image sensor and cause the camera to malfunction. In outdoor or indoor environments, when there is a laser display device, there is a high possibility of direct or indirect (laser beam reflection from reflective objects) damage to the camera CMOS sensor.

As the core component of shooting equipment, the replacement price of commonly used CMOS image sensors is about 5,000 yuan, which is expensive.

Although different lasers can cause damage to the cornea or retina of the human eye, as long as the product itself follows the safety standards for laser equipment and is controlled at the level of Class 1 laser, it is safe for the human eye.

At present, the lidar of most brands of models is arranged above the front windshield, while a few are arranged on both sides of the front bumper. Therefore, when shooting, pay attention to whether the vehicle is equipped with lidar and its location.

It is also worth mentioning that, regardless of whether the driving assistance function is used or not, the lidar of almost all vehicles will work after the vehicle is started to complete multi-sensor fusion to support functions such as active braking and environmental simulation. Therefore, the vehicle power can be turned off when shooting to avoid equipment damage.

Judging from the current vehicle-mounted lidar and the newly released lidar, their detection angle is 120 degrees, and the detection distance ranges from 150-250 meters. Therefore, when shooting dynamic and other materials when the vehicle is started, the shooting equipment should try to avoid It is safe to open its detection angle beyond 120 degrees.

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Editor in charge: Zhu Yuxiang