What are the advantages and disadvantages of ToF cameras: With the development of technology, we will often hear the statement of ToF cameras, so what exactly is ToF cameras, and the devices that use ToF technology to image are called ToF cameras. The ToF camera uses continuous wave modulation, and the distance information can be obtained by comparing the phase difference between the object's return signal and the emitted signal, and pixel-level measurement can be achieved.
ToF chip is the core of the ToF camera. Each pixel of the ToF chip records the phase of the incident light between the camera and the object. The sensor structure is similar to an ordinary image sensor, but it is more complex than an image sensor. It contains 2 or more shutters to sample reflected light at different times
If a ToF camera needs 5ps to cover a 1mm path, then a clock is needed to measure the 5ps single step duration. Different clock technology choices lead to different ToF camera types. Most of the current market is based on continuous wave intensity modulation method.
The advantage of the ToF chip is that the depth information can still complete traditional applications such as segmentation, marking, recognition, and tracking of target images. After further processing, it can complete applications such as 3D modeling, and can quickly complete target recognition and tracking.
ToF technology adopts the active light detection method. Unlike general lighting requirements, the purpose of the ToF camera irradiation unit is not to illuminate, but to measure the distance by using the change of the incident light signal and the reflected light signal. After high-frequency modulation, it is emitted. The pulsed light emitted by LED or laser diode is used, and the pulse can reach 100MHz. Similar to ordinary cameras, the front end of the ToF camera chip needs a lens to collect light.
