a device and method for spatially resolved photodetection and demodulation of temporally modulated electromagnetic waves makes it possible to measure phase , amplitude and offset of a temporally modulated , spatially coded radiation field . a micro - optical element spatially averages a portion of the scene and equally distributes the averaged intensity on two photo sites close to each other . adjacent to each of these photo sites are two storage areas into which charge from the photo site can be moved quickly and accumulated essentially free of noise . this is possible by employing the charge - coupled device principle . the device combines a high optical fill factor , insensitivity to offset errors , high sensitivity even with little light , simultaneous data acquisition , small pixel size , and maximum efficiency in use of available signal photons for sinusoidal as well as pulsed radiation signals . the device and method may be used in a time - of - flight range imaging system without moving parts , offering 2d or 3d range data .