VECTOR LIGHT FIELD ANALYSIS AND DETETION OF ORTHOGONAL POLARIZATION INTERFERENCE
In college physics,the interference and diffraction phenomena of light are very com-mon contents to describe the particle and wave properties of light.So the interference of light needs to meet the coherence condition,that is,two beams of light have the same polarization state,the same frequency,and a fixed phase difference.Therefore,in scalar diffraction theo-ry,completely orthogonal polarized light cannot undergo interference phenomena.To expand and explore the vector changes of the interference field when two beams of light meet under orthogonal polarization state,a light field generated by the interference of orthogonal polarized light(i.e.orthogonal linear polarization and orthogonal circular polarization)based on Mach-Zehnder configuration is constructed here.A polarizer is used to detect the vector features and fringes distribution of the light field.The results demonstrate that orthogonal polarized light interference generates periodic vector light fields.This study can help college students more intuitively understand the modulation of beams with different polarization states by wave plates and polarizers,and achieve the detection and analysis of vector light fields.
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