Circularly polarized light of left-handed and right-handed rotation has i mportant applications in scientificresearches[1-4],for example,the analysis of molecularstructure ,andto erase the scatteredlight of water parti-cle andraisethe contrast of underwater objectsin under-wateri maging.If we want tochange monochromatic na-ture light into circularly polarized light , firstly, weshould have a polarizer and aλ/4 retarder ;secondly,the angle between the polarizer' s transmission axis andλ/4 reta…