Fig. 1. Ray cone that produced by convergent parallel rays through a lens: (a) Sketch of ray-tracing; (b) simplified ray model of ray cone.平行光经透镜聚焦后产生锥形光线　(a)光线追踪示意图; (b)光锥的简化光线模型

Fig. 2. Ray model of Airy beam at (a) , (b) , (c) , (d) , and (e) . Backgrounds is the normalized intensity distribution. The transverse directions of rays are represented by red arrows, the length of arrow is proportional to the sine of the angle between the ray and the z axis. (f) Ray model of Airy beam. Different colors are used to distinguish the rays at different positions. 不同横截面处Airy光束的光线分布, 其中(a) , (b) , (c) , (d) , (e) ; 背景色为归一化的光强分布; 灰色点为光线起点, 红色箭头为光线在xoy面投影矢量, 长度正比于光线与z轴的夹角大小; (f) Airy光束的光线模型; 不同颜色用以区分不同位置的光线

Fig. 3. Ray model of Cusp beam at (a) , (b) , (c) , (d) , and (e) . Backgrounds is the normalized intensity distribution. The transverse directions of rays are represented by red arrows, the length of arrow is proportional to the sine of the angle between the ray and the z axis. (f) Ray model of Cusp beam. Different colors are used to distinguish the rays at different positions. 不同横截面处Cusp光束的光线分布, 其中(a) , (b) , (c) , (d) , (e) ; 背景色为归一化的光强分布; 灰色点为光线起点, 红色箭头为光线在xoy面投影矢量, 长度正比于光线与z轴的夹角大小; (f) Cusp光束的光线模型; 不同的颜色用以区分不同位置的光线

Fig. 4. Ray-cone and its Fourier angular spectrum: (a) Ray tracing model of convergent parallel rays; (b) reconstructed Fourier angular spectrum according to the ray model.光锥模型及其焦面的傅里叶角谱　(a)经过物镜聚焦后的平行光的光线追踪示意图; (b)使用光线重构得到的焦面上光场的傅里叶角谱

Fig. 5. High-dimensional ray model of convergent beam: (a) 3D ray model of convergent beam; (b) projection of 3D ray model in xoz plane; (c) projection of 3D ray model in poz plane. 一维聚焦光束的高维光线模型　(a)聚焦光束的三维光线模型; (b)三维光线模型在xoz平面内的投影; (c)三维光线模型在poz平面内的投影

Fig. 6. High-dimensional ray model of (1 + 1)D Airy beam: (a) 3D ray model of (1 + 1)D Airy beam; (b) projection of 3D ray model in xoz plane; (c) projection of 3D ray model in poz plane. 二维Airy光束的高维光线模型　(a) Airy光束的三维光线模型; (b)三维光线模型在xoz平面内的投影; (c)三维光线模型在poz平面内的投影

Fig. 7. High-dimensional ray model of Hermit-Gaussian beam in quadratic gradient-index waveguide: (a) 3D ray model; (b) projection of 3D ray model in xoz plane; (c) projection of 3D ray model in poz plane. 二维抛物线型波导中的厄米-高斯光束的高维光线模型　(a)三维光线模型; (b)三维光线模型在xoz平面内的投影; (c)三维光线模型在poz平面内的投影