A design method of the distortionless catadioptric panoramic imaging based on freeform surface

2014 ◽  
Author(s):  
Yi-si Wu ◽  
An Li ◽  
Chi Chen ◽  
Jun-fei Shen ◽  
Yin-xu Bian ◽  
...  
Keyword(s):  
Design Method ◽  
Freeform Surface ◽  
Panoramic Imaging

scholarly journals Asymmetric Double Freeform Surface Lens for Integrated LED Automobile Headlamp

Micromachines ◽  
2021 ◽  
Vol 12 (6) ◽  
pp. 663
Author(s):  
Hui Zhang ◽  
Dengfei Liu ◽  
Yinwan Wei ◽  
Hong Wang
Keyword(s):  
Optical System ◽  
Design Method ◽  
Chromatic Dispersion ◽  
Electronic Devices ◽  
Color Temperature ◽  
Freeform Surface ◽  
United Nations Economic Commission ◽  
System A ◽  
Economic Commission ◽  
Key Points

We propose a design method of asymmetric double freeform surface lens for an integrated LED automobile headlamp and develop an integrated LED automobile optical system. A single asymmetric double freeform surface lens is designed to redistribute rays emitting from the light source for realizing both low and high beams. Moreover, a freeform surface reflector is used to improve the energy efficiency of high beams. The prism placed in the optical path can suppress chromatic dispersion on the edge of the target plane. Simulation and experimental results show that the illumination values and color temperature of the key points can fully meet the requirements of United Nations Economic Commission for Europe vehicle regulations (ECE) R112, 48, and 128. The volume of the whole optical system comprised of freeform surface elements is smaller than that of the low beam system of a traditional headlamp, resulting in saved space, in which other electronic devices can be installed for the safety of the driver, which indicates that the proposed method is practical in the field of automobile lighting.

Multi-fields Optimization Iterative Design Method for Freeform Surface in Ultra-short-focus Projection System

2019 ◽  
Vol 48 (3) ◽  
pp. 322001 ◽  
Author(s):  
于百华 YU Bai-hua ◽  
田志辉 TIAN Zhi-hui ◽  
苏东奇 SU Dong-qi ◽  
高松涛 GAO Song-tao ◽  
隋永新 SUI Yong-xin ◽  
...  
Keyword(s):  
Design Method ◽  
Freeform Surface ◽  
Projection System ◽  
Iterative Design ◽  
Focus Projection

Freeform surface design method combined with surface and field-of-view optimization

2018 ◽  
Vol 47 (10) ◽  
pp. 1018001
Author(s):  
姚艳霞 Yao Yanxia ◽  
袁 群 Yuan Qun ◽  
陈 露 Chen Lu ◽  
窦沂蒙 Dou Yimeng ◽  
殷慧敏 Yin Huimin ◽  
...  
Keyword(s):  
Design Method ◽  
Field Of View ◽  
Freeform Surface ◽  
Surface Design

Freeform Surface Combination Design Method of Multidirectional Parallel Beam Splitting Lens

2017 ◽  
Vol 54 (11) ◽  
pp. 112204
Author(s):  
林浩博 Lin Haobo ◽  
万运佳 Wan Yunjia ◽  
刘 杰 Liu Jie ◽  
张 健 Zhang Jian ◽  
熊 晖 Xiong Hui
Keyword(s):  
Design Method ◽  
Freeform Surface ◽  
Beam Splitting ◽  
Parallel Beam

Design Method of Diffuse Reflection Freeform Surface

2017 ◽  
Vol 54 (5) ◽  
pp. 052201
Author(s):  
祝振敏 Zhu Zhenmin ◽  
罗慧 Luo Hui
Keyword(s):  
Diffuse Reflection ◽  
Design Method ◽  
Freeform Surface

scholarly journals Design method for nonsymmetric imaging optics consisting of freeform-surface-substrate phase elements

2020 ◽  
Vol 28 (2) ◽  
pp. 1603
Author(s):  
Yingzhe Duan ◽  
Tong Yang ◽  
Dewen Cheng ◽  
Yongtian Wang
Keyword(s):  
Design Method ◽  
Freeform Surface ◽  
Imaging Optics

An 360°Panoramic Imaging Design Method for Cylindrical Object

2015 ◽  
Vol 35 (9) ◽  
pp. 0923002
Author(s):  
吴晓军 Wu Xiaojun ◽  
郭亚雪 Guo Yaxue
Keyword(s):  
Design Method ◽  
Cylindrical Object ◽  
Panoramic Imaging

Design method of double freeform surface lens with diffuse reflection

2019 ◽  
Vol 52 (2) ◽  
pp. 247-256
Author(s):  
Z Zhu ◽  
B Peng ◽  
J Yuan ◽  
X Xu
Keyword(s):  
Light Source ◽  
Small Angle ◽  
Diffuse Reflection ◽  
Design Method ◽  
Large Angle ◽  
Optical Systems ◽  
Freeform Surface ◽  
Different Shapes

The design method of a double freeform surface lens is being widely applied in non-imaging optical systems. In this paper, a diffuse reflection freeform surface is introduced into the design of a double freeform surface lens. Different from the universal double freeform surface lens, this double freeform surface lens is divided into a small-angle freeform surface and a large-angle diffuse reflection freeform surface. The small-angle freeform surface firstly limits and forms the lighting area. Then, the large-angle freeform surface is designed to improve the efficiency of lighting the area. And this front light diffuse reflection effectively avoids the influence of light source projection onto the lighting effects. Based on this design method, the double freeform surface lens is obtained. The results show that the efficiency of a circular lighting area reaches 81% and the uniformity of the irradiance distribution reaches 91%. And this design is also suitable for forming different shapes of lighting areas while maintaining a better lighting effect.

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