A time of flight sensor is nothing but a sensor that uses time of flight to measure depth and distance. A camera equipped with a ToF sensor measures distance by actively illuminating an object with a modulated light source (such as a laser or an LED). It uses a sensor that is sensitive to a laser’s wavelength (typically 850nm or 940nm) to capture the reflected light. The sensor measures the time delay ∆T from when the light is emitted and when the reflected light is received by the camera or sensor. This time delay is proportional to twice the distance between the camera and the object. Read More>>
That’s a concise and accurate description of how a time-of-flight (ToF) sensor works. If you have any specific questions or if there’s more information you’d like to know about ToF sensors or their applications, feel free to ask!