As early as 424 BC, the play "Clouds" by the ancient Greek poet Aristophanes mentions that it is possible to extract fire by focusing sunlight. From then to the present day, the study of the behavior of light in focus has aroused interest among opticians. In focus, light converges from different regions of space, which has different amplitude, phase and polarization state. To adequately describe light in focus, all six projections of electric and magnetic field strength vectors should be used.