A design method of freeform lens for LED based on intensity distribution

Optik ◽  
2019 ◽  
Vol 179 ◽  
pp. 266-272
Author(s):  
Y. Cheng ◽  
Y.B. Lu
Keyword(s):  
Intensity Distribution ◽  
Design Method ◽  
Freeform Lens

scholarly journals Design of a Secondary Freeform Lens of UV LED Mosquito-Trapping Lamp for Enhancing Trapping Efficiency

Crystals ◽  
2018 ◽  
Vol 8 (9) ◽  
pp. 335 ◽  
Author(s):  
Wei-Hsiung Tseng ◽  
Diana Juan ◽  
Wei-Cheng Hsiao ◽  
Cheng-Han Chan ◽  
Hsin-Yi Ma ◽  
...  
Keyword(s):  
Light Intensity ◽  
Intensity Distribution ◽  
Light Emitting Diode ◽  
Trapping Efficiency ◽  
Axially Symmetric ◽  
Light Intensity Distribution ◽  
Light Emitting ◽  
Led Light ◽  
Uv Led ◽  
Freeform Lens

In this study, our proposed ultraviolet light-emitting diode (UV LED) mosquito-trapping lamp is designed to control diseases brought by insects such as mosquitoes. In order to enable the device to efficiently catch mosquitoes in a wider area, a secondary freeform lens (SFL) is designed for UV LED. The lens is mounted on a 3 W UV LED light bar as a mosquito-trapping lamp of the new UV LED light bar module to achieve axially symmetric light intensity distribution. The special SFL is used to enhance the trapping capabilities of the mosquito-trapping lamp. The results show that when the secondary freeform surface lens is applied to the experimental outdoor UV LED mosquito-trapping lamp, the trapping range can be expanded to 100π·m2 and the captured mosquitoes increased by about 300%.

Optical design method of freeform lens for a high-power extended LED source

2012 ◽  
Author(s):  
Hong Wang ◽  
Naifeng Du ◽  
Yuefeng Wu ◽  
Huamao Huang
Keyword(s):  
High Power ◽  
Design Method ◽  
Optical Design ◽  
Freeform Lens

Novel Application-Specific LED Packages Integrated With Compact Freeform Lens

2009 ◽  
Author(s):  
Kai Wang ◽  
Fei Chen ◽  
Zongyuan Liu ◽  
Xiaobing Luo ◽  
Sheng Liu
Keyword(s):  
Design Method ◽  
Low Cost ◽  
Light Output ◽  
Cost Effective ◽  
Superior Performance ◽  
Street Lighting ◽  
Low Profile ◽  
Led Array ◽  
Application Specific ◽  
Freeform Lens

It has been widely accepted that solid state lighting, in terms of white light emitting diodes (LEDs), will be the fourth illumination sources due to their superior performance. In this study, an effective compact freeform lens design method for LED packaging was introduced. A compact silicone LED packaging lens with the refract index of 1.54 was designed for street lighting based on this method. Integrated with this small lens, a novel application-specific LED package, whose manufacturing process can be easily integrated into current LED packaging processes, was suggested. Two application-specific LED array modules, with the type of chip on board (CoB) package, were also designed by integrating 3×3 freeform silicone and polycarbonate (PC) lens arrays. Numerical simulation results demonstrated that the optical performances of these application-specific LED modules could directly meet the requirements of street lighting. By comparing with the traditional LED illumination module consisting of an LED and secondary optics, the novel application-specific LED packages have the advantages of low profile, small volume, high light output efficiency (LOE), low cost and convenience for customers to use, and they will probably become the trend of LED packages, providing more cost-effective solution to general lighting.

Compact collimators designed with point approximation for light-emitting diodes

2016 ◽  
Vol 50 (2) ◽  
pp. 303-315
Author(s):  
T Luo ◽  
G Wang
Keyword(s):  
Design Method ◽  
Light Emitting Diode ◽  
Lens Design ◽  
Beam Angle ◽  
Optical Efficiency ◽  
Light Emitting ◽  
Chip Size ◽  
Practical Performance ◽  
Freeform Lens ◽  
Collimating Lens

We present a novel freeform lens design method for application to light-emitting diode collimating illumination. The lens is designed with a point-source assumption to form compact collimators. The method is derived from a basic geometric-optics analysis and the associated construction approach. By using this method, a compact collimating lenses with an aspect ratio = 0.181 is developed. With optimization of initial parameters, a highly collimating lens for a Cree XP-E LED (chip size: 1.2 mm × 1.2 mm) with an optical efficiency of 88.5% under a beam angle of ± 1.9° is constructed by simulation. To verify the practical performance of the lens, a prototype of the collimator lens is also made. This has light distribution compatible with the simulation results.

53.2: An Optimization Design Method of LED Freeform Lens for Uniform Circular Illumination

2013 ◽  
Vol 44 (1) ◽  
pp. 733-736
Author(s):  
Peng Liu ◽  
Zhen-rong Zheng ◽  
Hai-feng Li ◽  
Xu Liu
Keyword(s):  
Optimization Design ◽  
Design Method ◽  
Freeform Lens

Fast design method of smooth freeform lens with an arbitrary aperture for collimated beam shaping

2019 ◽  
Vol 58 (10) ◽  
pp. 2512 ◽  
Author(s):  
Xianglong Mao ◽  
Jinpeng Li ◽  
Fengbiao Wang ◽  
Rong Gao ◽  
Xing Li ◽  
...  
Keyword(s):  
Design Method ◽  
Beam Shaping ◽  
Collimated Beam ◽  
Freeform Lens

Design of a freeform lens for structured light illumination by deconvolution algorithm and feedback modification

2017 ◽  
Vol 51 (1) ◽  
pp. 154-163
Author(s):  
P Ge ◽  
K Zhang ◽  
L Mao ◽  
Y Zhang ◽  
H Xu
Keyword(s):  
Light Source ◽  
Design Method ◽  
Structured Light ◽  
Light Illumination ◽  
Structured Light Illumination ◽  
Deconvolution Algorithm ◽  
Sinusoidal Pattern ◽  
Simulation Results ◽  
Freeform Lens

In this paper, we propose a method combining a deconvolution algorithm and a feedback modification to design a freeform lens for structured light illumination. The deconvolution algorithm can alleviate the blur effect caused by the extended light source and the feedback modification can further improve the quality of the structured light by iteration. A lens for a linear sinusoidal pattern is designed by the proposed method. Simulation results show the contrast is 89%, compared to 57% achieved by the conventional design method.

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