A lens includes a depth of field range and a macro range. \u22124\xd72\u03c0Ms2\u2266Ku\u22666\xd72\u03c0Ms2 is satisfied, wherein Ku represents a perpendicular magnetic anisotropy constant of the magnetic functional layer and Ms represents a saturation magnetization. The first converter module may have a first terminal and a second terminal, wherein the first terminal is coupled to the input power terminal and the second terminal is coupled to the capacitor module. The system contains a database of operating parameters for different types of lamps with the ability to add new lamps. They can be supplemented with IL-6 and IL-12. In the integrated body, a first switching element, a constant current element, and a diode are connected in series.