| 摘要 |
The invention relates to a method for determining the distance of an object (10) by means of a polarization-modulated transmission light beam (LS), wherein the transmission light beam (LS) reflected at the object (10) is received as reception light beam (LE) by a polarization analyzer and the output signal thereof is fed to an evaluation unit (A) for determining the distance. The invention provides for the polarization-modulated transmission light beam (LS) to be generated by means of at least two light sources (D1, D2, D3) which emit differently polarized light beams (L1, L2, L3), wherein the light sources (D1, D2, D3) are operated in each case with a defined mark-space pattern (M1, M2, M3, M4, M5, M6), and the polarization analyzer is embodied with polarization filters (P1, P2, P3) corresponding at least to the number of light sources (D1, D2, D3), the plane of polarization of said polarization filters being correspondingly adapted in each case to a plane of polarization (E1, E2, E3) of the light beams (L1, L2, L3). |
