Effects of Luminous Intensity Distribution of LED Luminaires on United Glare Rating, Illuminance, and Illuminance Uniformity Values

2017 ◽  
Vol 31 (9) ◽  
pp. 1-8
Author(s):  
In-Tae Kim ◽  
A-Rom Son ◽  
An-Seop Choi
Keyword(s):  
Intensity Distribution ◽  
Luminous Intensity ◽  
Illuminance Uniformity

scholarly journals Evaluation of the Luminous Intensity Distribution of Stop Lamp for Agricultural Tractors

2011 ◽  
Vol 36 (6) ◽  
pp. 416-421
Author(s):  
Hyung-Kweon Kim ◽  
Yu-Yong Kim ◽  
Seoung-Yeoup Shin ◽  
Byoung-Gap Kim ◽  
Ho-Sang Lee
Keyword(s):  
Intensity Distribution ◽  
Luminous Intensity ◽  
Agricultural Tractors

Optical design of light guide prisms with surface roughness for automotive tail lights

2020 ◽  
Vol 234 (9) ◽  
pp. 2393-2401
Author(s):  
Elif Güney ◽  
Mürsel Alper ◽  
Mürşide Hacıismailoğlu
Keyword(s):  
Surface Roughness ◽  
Light Guide ◽  
Optical Design ◽  
Luminous Intensity ◽  
Legal Requirements ◽  
Design Software ◽  
Simulation Results ◽  
Light Guides ◽  
Illuminance Uniformity

This study presents the optical design of light guide prisms for automotive tail light applications to obtain the optimum luminous intensity and the illuminance uniformity. The design was achieved using optical design software, SPEOS. By considering the axial luminous intensity and legal requirements, the optimum prism angles of light guides were determined by simulations. After determining the prism angles, the effect of different surface roughness on the luminous intensity and the illuminance uniformity was investigated. The light guides designed by considering data from the simulation were manufactured as prototypes and their photometrical measurements were made. These measurements were compared to the simulation results. It was observed that simulation and prototype results are well in agreement with each other. Furthermore, it was found that as the surface roughness increases both the luminous intensity decreases and the illumination becomes more uniform.

High Efficiency LED Module with 3D Bending Machine

2012 ◽  
Vol 579 ◽  
pp. 10-21 ◽  
Author(s):  
Chung Yi Lin ◽  
Tung Cheng Pan ◽  
Yao Chi Peng ◽  
Jian Shian Lin ◽  
Cheng Hao Ko ◽  
...  
Keyword(s):  
Automatic Control ◽  
Intensity Distribution ◽  
High Efficiency ◽  
Light Emission ◽  
Optical Design ◽  
Three Dimensional ◽  
Control Program ◽  
High Accuracy ◽  
Luminous Intensity ◽  
Bending Angles

Abstract- In this paper, a bending machine for tuning optical design of LED module is proposed. The tuning is done by changing the bending angles of each package on a given module with the help of automatic control program. Luminous intensity distribution can be controlled by adjusting the light emission path, which in turn can be implemented as changing the bending angles of individual LED packages on the module. The proposed machine is capable of bending packages to specified angles with errors less than 0.1°. Three-dimensional light distribution for bent package LED modules is also studied based on various application scenarios so that each scenario can have diversified luminous intensity distribution resulting in higher uniformity and better luminance quality. The machine has several advantages, including quick bending, high accuracy, and great customizability. These advantages make the machine meet the requirements of automatic mold forming.

scholarly journals Geometric system analysis of ILMD-based LID measurement systems using Monte-Carlo simulation

2022 ◽  
Vol 2149 (1) ◽  
pp. 012015
Author(s):  
M Katona ◽  
K Trampert ◽  
C Schwanengel ◽  
U Krüger ◽  
C Neumann
Keyword(s):  
Monte Carlo ◽  
Intensity Distribution ◽  
System Analysis ◽  
Uncertainty Budget ◽  
Luminous Intensity ◽  
Light Sources ◽  
Measuring Device ◽  
Measurement Systems ◽  
Kinematic Transformations ◽  
Set Up

Abstract Imaging Luminance Measuring Device (ILMD) based luminous intensity distribution measurement systems are an established method for measuring the luminous intensity distribution (LID) of light sources in the far field. The advantage of this system is the high-resolution acquisition of a large angular range with one image. For the uncertainty budget, the mathematical description of the system can be divided into photometric and geometric contributions. In the following, we will present a Monte-Carlo approach to analyse the geometric contributions which are the uncertainty of measurement direction and measurement distance. Therefore, we set up a geometric system description based on kinematic transformations that describes the connection between detector and light source position. To consider all relevant input quantities we simulate the adjustment and measurement process. Finally, an analysis of the geometric input parameters is shown.

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