Modulation frequency of the infrared light projected by the ToF camera illumination system is related to the depth quality/accuracy. Higher the modulation frequency, the better the depth quality, but at the same time the gap will be reduced. Therefore, high depth accuracy requires high modulation frequencies, but for longer ranges, lower modulation frequencies are required. To solve this problem, DOMI ToF sensors use two different modulation frequencies. This means taking a distance measurement for each frequency and then comparing the measurements at both frequencies to determine the exact location of the object, which extends the measurement range beyond the range of each modulated frequency.
DOMI's latest generation of 3D ToF sensors and associated VCSEL driver chips enable 3D imaging systems to use higher modulation frequencies than ever before. In this way, depth accuracy is improved and, at the same time, the surrounding environment can be scanned in high quality at ranges of up to 5 meters. At distances up to 5 meters, even high-resolution images of multiple depth points can be obtained.
ToF camera can achieve very efficient image processing, so the beautification effect can also be applied to the smartphone camera function in real time. In conclusion, in a properly designed 3D camera system, the ToF camera ensures reliable performance in all ambient light conditions, whether in strong sunlight, in the dark, or in buildings or cars work.