scholarly journals Angular and spectral radiant intensity distribution of high brightness white LEDs

2012 ◽  
Vol 45 (2) ◽  
pp. 131-136
Author(s):  
A. Villamarín
Keyword(s):  
Intensity Distribution ◽  
High Brightness ◽  
Radiant Intensity ◽  
White Leds

Spatial Distribution of Radiant Intensity from Primary Sources for Atomic Absorption Spectrometry. Part I: Hollow Cathode Lamps

1995 ◽  
Vol 49 (4) ◽  
pp. 413-424 ◽  
Author(s):  
Albert Kh. Gilmutdinov ◽  
Bernard Radziuk ◽  
Michael Sperling ◽  
Bernhard Welz ◽  
Konstantin Yu. Nagulin
Keyword(s):  
Spatial Distribution ◽  
Atomic Absorption Spectrometry ◽  
Atomic Absorption ◽  
Intensity Distribution ◽  
Hollow Cathode ◽  
Imaging System ◽  
Absorption Spectrometry ◽  
Operating Conditions ◽  
Radiant Intensity ◽  
Warm Up

The spatial distribution of radiant intensity from hollow cathode lamps used as radiation sources in atomic absorption spectrometry is investigated with a digital photodiode array imaging system. Intensity distribution over the cross section of each lamp is measured for both atomic and ionic lines of the analyte and the filler gas. The shape of the distribution is strongly dependent on the hollow cathode diameter. In small cathodes the distribution has the shape of a paraboloid with maximum intensity at the hollow cathode axis for all of the recorded lines. The intensity distributions of lines emitted from large cathodes are nonparaboloid and in some cases have a minimum at the cathode axis and a maximum concentric to the cathode walls. It is shown that the intensity distribution for a given lamp has practically the same shape for all currents applied. Data on the evolution of the intensity distribution during warm-up of the lamps and under various operating conditions are presented.

scholarly journals High-Brightness Blue and White LEDs based on Inorganic Perovskite Nanocrystals and their Composites

2017 ◽  
Vol 29 (23) ◽  
pp. 1606859 ◽  
Author(s):  
En-Ping Yao ◽  
Zhanlue Yang ◽  
Lei Meng ◽  
Pengyu Sun ◽  
Shiqi Dong ◽  
...  
Keyword(s):  
High Brightness ◽  
Inorganic Perovskite ◽  
Perovskite Nanocrystals ◽  
White Leds

Ca3Lu(GaO)3(BO3)4:Eu3+: A novel high-brightness and thermal-stable red-emitting phosphor for white LEDs

2018 ◽  
Vol 202 ◽  
pp. 403-408 ◽  
Author(s):  
Liangling Sun ◽  
Heng Guo ◽  
Jia Liang ◽  
Bin Li ◽  
Xiaoyong Huang
Keyword(s):  
High Brightness ◽  
White Leds ◽  
Thermal Stable ◽  
Red Emitting Phosphor

Optimal Design of Life Testing for High-Brightness White LEDs Using the Six Sigma DMAIC Approach

2015 ◽  
Vol 15 (4) ◽  
pp. 576-587 ◽  
Author(s):  
Jiajie Fan ◽  
Cheng Qian ◽  
Kam-Chuen Yung ◽  
Xuejun Fan ◽  
Guoqi Zhang ◽  
...  
Keyword(s):  
Optimal Design ◽  
Six Sigma ◽  
Life Testing ◽  
High Brightness ◽  
White Leds

Single-crystal phosphors for high-brightness white LEDs/LDs

2016 ◽  
Author(s):  
Encarnación G. Víllora ◽  
Stelian Arjoca ◽  
Daisuke Inomata ◽  
Kiyoshi Shimamura
Keyword(s):  
Single Crystal ◽  
High Brightness ◽  
White Leds

High-brightness cyan-emitting Eu2+-activated orthophosphate phosphors for near-UV-pumped white LEDs

2021 ◽  
pp. 118640
Author(s):  
Zhe Xu ◽  
Balaji Devakumar ◽  
Nan Ma ◽  
Wei Li ◽  
Xiaoyong Huang
Keyword(s):  
High Brightness ◽  
White Leds
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