Distance measuring system based on causal vector light field

The invention discloses a distance measuring system based on a focal dispersion vector light field, which comprises a linearly polarized light generator carrying collimation in the horizontal direction, a 4f system used for overlapping coherences of different levels into a focal dispersion light field with radial polarization change, a polarization analyzer and a CCD (Charge Coupled Device) receiving device, and is characterized in that a wave plate used for changing the polarization state of a light beam is arranged in the 4f system; the vector light field with the center polarization state capable of being regulated and controlled can be generated without any optical component, the polarization direction of the center polarization state is detected through the polarization analyzer, and therefore the vector light field generation device is applied to the industries where light field regulation and control are needed and distance monitoring is needed, and has the advantages of being flexible in regulation an