Fig. 1. Optical system of polygonal apertures

Fig. 2. Schematic diagrams of light field controlled by polygonal apertures. (a) System structure; (b) light field controlled by polygonal apertures behind the axicon and the focusing lens, respectively

Fig. 3. Numerical simulation spot diagrams of the light source controlled by polygonal apertures after passing through the axicon

Fig. 4. Experimental results spot diagram of the light source controlled by polygonal apertures after passing through the axicon

Fig. 5. Hollow spot diagrams of the light source controlled by polygonal apertures after passing through the axicon and the lens