| 摘要 |
<p>A method for 3D imaging of a scene is disclosed wherein a modulation signal and a first reference signal, which is correlated to said modulation signal, are generated and wherein the modulation signal is used to drive a first illumination unit in order to generate intensity-modulated light, which is emitted onto said scene. The so illuminated scene is then imaged onto a pixel array comprising at least one pixel e.g. by use of an optical system. The method further comprises the detection, in at least one pixel of the pixel array, of intensity-modulated light reflected from the scene onto said pixel, the conversion of said detected light into a corresponding reflected light signal and the subsequent demodulation, for at least one pixel, of said reflected light signal by means of said first reference signal in order to obtain a signal representative of the phase difference between the emitted light and the reflected light detected in the pixel. According to the invention, step of demodulating said reflected light signal comprises the steps of combining said reflected light signal and said first reference signal additively to form a sum of said reflected light signal and said first reference signal and subsequently applying the sum of said reflected light signal and said first reference signal to a functional block having a nonlinear characteristic.</p> |
