1 云南师范大学信息学院，云南 昆明 650500
2 云南财经大学信息学院，云南 昆明 650221
3 云南师范大学地理学部，云南 昆明 650500
多波束天线技术可用于提升频谱资源利用率和信道容量而备受关注，而利用变换光学的方法设计各类天线也成为近年来的研究热点。提出了利用面积映射方法来设计多波束透镜天线，探讨了透镜天线的实现方法，并仿真验证了天线性能。研究结果表明，基于面积映射方法所设计的多波束透镜天线可呈现出无磁性且分块均匀的材料参数分布，进而可用介质基板钻孔或等效媒质方法来合成器件，用以重塑偶极子天线的辐射方向，提升辐射增益，实现多方向定向辐射。
光学器件 梯度指数透镜 超材料 等效媒质理论 激光与光电子学进展
2022, 59(3): 0323002
Author Affiliations
Abstract
School of Electrical Engineering, Iran University of Science and Technology, Tehran 1684613114, Iran
This Letter presents an original technique to design and synthesize an inhomogeneous asymmetrical lens resulting in a special fan-beam radiation pattern in a wide frequency bandwidth. The vertical and horizontal planes of the fan-beam radiation pattern can be determined separately. Wide angle search and detection are achievable by using this type of lens antenna because of its suitable radiation pattern. The proposed relative index profile is validated by the means of commercial CST software and an FDTD scheme.
160.3918 Metamaterials 080.0080 Geometric optics 080.3630 Lenses 080.5692 Ray trajectories in inhomogeneous media 110.2760 Gradient-index lenses 230.7370 Waveguides Chinese Optics Letters
2016, 14(12): 121601
Author Affiliations
Abstract
Department of Electrical Engineering, University of Utah, Salt Lake City, UT 84118, USA
Simple single-lens equivalent systems for graded-index (GRIN) lenses in inhomogeneous medium obtained using matrix optics are proposed in this letter. Due to its simplicity, the equivalent optical system enables quick analysis of the imaging properties of GRIN lens rod immersed in inhomogeneous medium. This facilitates the optical analysis of complicated optoelectronics systems in inhomogeneous medium utilizing GRIN lens rods.
自聚焦透镜 矩阵光学 一阶光学系统 070.2590 ABCD transforms 080.2468 First-order optics 080.2730 Matrix methods in paraxial optics 110.2760 Gradient-index lenses Chinese Optics Letters
2010, 8(7): 647
Author Affiliations
Abstract
School of Electronic Engineering and Optoelectronic Techniques, Nanjing University of Science and Technology, Nanjing 2100942 School of Optometry and Ophthalmology, Jinling Institute of Technology, Nanjing 210001
The surfaces and refractive index of crystalline lens play an important role in the optical performance of human eye. On the basis of two eye models, which are widely applied at present, the effect of lens surfaces and its refractive index distribution on optical imaging is analyzed with the optical design software ZEMAX (Zemax Development Co., San Diego, USA). The result shows that good image quality can be provided by the aspheric lens surfaces or (and) the gradient-index (GRIN) distribution. It has great potential in the design of intraocular lens (IOL). The eye models with an intraocular implantation are presented.
视光学 人眼模型 光学设计 晶状体 330.7320 Vision adaptation 170.4460 Ophthalmic optics and devices 220.1250 Aspherics 110.2760 Gradient-index lenses Chinese Optics Letters
2008, 6(5): 377
