The conventional depth map sensors have limited depth range, or they need to sacrifice depth accuracy for a larger workingrange. To overcome such problems, in this work, we propose a co-axial depth map sensor with an extended depth rangebased on controlled aberrations. This depth map sensor implements depth measurement by projecting a near-infraredastigmatic pattern onto the test scene and measuring the contrast change of the reflected pattern image in the tangentialand sagittal directions. By adding a tunable lens in the projection optics, this depth map sensor can achieve the extendeddepth measurement without the loss of high depth accuracy and high depth map resolution.
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