RANGE MEASURING APPARATUS

摘要

The present invention relates to a distance measurement device and a distance measurement method thereof. The distance measurement device includes a pulse light source which outputs a pulse beam; an optical system collecting the pulse beam which reflected or scattered back from a target object; a linear reference polarizing plate which linearly polarizes the back-scattered pulse beam; a polarization rotator which is arranged on the rear part of the linear reference polarizing plate to rotate the polarization direction based on a driving signal synchronized to the pulse light source; a linear measurement polarizing plate arranged on the rear end of the polarization rotator; and an optical sensor array which is arranged to the rear part of the linear measurement polarizing plate. The linear measurement polarizing plate includes pixels, and the pixels include sub-pixels with at least two different polarization directions. The sub-pixels in the linear measurement polarizing plate are aligned with the sub-pixels of the optical sensor array.