Method for determining the distance of an object by means of a polarization-modulated transmission light beam
In a method of determining the distance of an object (10), a polarization-modulated transmission light beam (LS) is reflected at the object (10) and is received as a reception light beam (LE) by a polarization analyzer, and the output signal thereof is fed to an evaluation unit (A) for determining t...
Saved in:
Main Author | |
---|---|
Format | Patent |
Language | English |
Published |
15.05.2018
|
Subjects | |
Online Access | Get full text |
Cover
Loading…
Summary: | In a method of determining the distance of an object (10), a polarization-modulated transmission light beam (LS) is reflected at the object (10) and is received as a 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 polarization-modulated transmission light beam (LS) is generated by 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 each respectively operated with a distinct defined mark-space pattern (M1, M2, M3, M4, M5, M6). The polarization analyzer has polarization filters (P1, P2, P3) corresponding at least to the number of light sources. The respective polarization plane of each one of the polarization filters is correspondingly adapted to a respective polarization plane (E1, E2, E3) of the light beams (L1, L2, L3). |
---|---|
Bibliography: | Application Number: US201414904492 |