Measurement methods adopted by the ToF sensor currently mainly include continuous wave CW and pulse. Regardless of the technical system, continuous wave CW and pulsed require consideration of measurement distance, system environment, accuracy requirements, power consumption and size.
ToF sensor continuous wave CW uses a periodic modulation signal to actively emit light, and then performs homodyne demodulation on the received signal to measure the phase shift of the reflected light. At present, the widely used continuous wave CW technology systems on the market all use CMOS sensors. ToF sensor CMOS sensing with high output data rate.
In addition to the faster speed, the ToF sensor CMOS imager has relatively high flexibility and rich functions. And for applications that do not require high precision, continuous-wave CW systems are easier to implement than pulsed systems, which are not as demanding as CCDs for laser pulses. And it can not be ignored that in the imager system, ToF sensor CMOS is much simpler than non-CMOS power supply design, such as CCD will require higher positive and negative power supply.
In the scene application of longer measurement distance and stronger ambient light, the pulse technology system has greater advantages, and the continuous optical CW system inevitably needs to increase the optical power in this application. DOMI latest ToF sensor transmits depth data in real-time with millisecond capture speed, and is extremely robust in harsh environmental conditions. DOMI ToF sensor is resistant to external light sources such as sunlight or other infrared emitting light sources with high stability.
