The main difference: the spectral characteristics determine wavelength.
1. Vehicle night vision camera or vehicle-mounted laser night vision device, low-light infrared or laser infrared is the active emission of the laser of the camera, which emits a light belonging to the near-infrared wavelength to provide illumination for the camera. The image can clearly see the human face or the license plate, just like our eyes can see the specific features with a flashlight. Like the car camera with night vision function, the LED lamp bead emits light. The low light works after laser emitting light. As the distance is relatively long, the supplementary light needs a laser but the distance of the LED lamp bead is limited.
Poor ability to prevent high beams, parallax in all night, poor ability to penetrate fog and poor ability to penetrate rain and snow.
Cheap and be installed inside the car; can see specific details such as human face and license plate, etc; easy access to evidence.
2. The automotive thermal imager does not emit light by itself and processes the infrared light emitted by the temperature of the object into an image. This line of infrared light belongs to the wavelength of far infrared since it does not emit light, it is also called passive infrared.
The vehicle thermal imaging camera can penetrate long distances; no light source is needed with full dark night vision; high beams and strong lights do not interfere with pedestrian prompts and alarms and isolation belt and roadside grass and trees. pedestrians and animals can be detected and found; it can penetrate fog, dust, haze, rain and snow; it is mostly used in fire fighting and for other special purposes.
The price of automotive thermal imager is high and they are usually installed on the top version of luxury cars and normal car owners know little about it.