Knowledge - Tech Notes

Knowledge - Tech Notes

An undesired change in visual perception induced by a light stimulus whose luminance or spectral distribution fluctuates with time, for an observer in a certain environment. Read More
Index Defined by Definition Point Formula Index range
Percent Flicker Illuminating Engineering Society (IES) A relative measure of the cyclic variation in the amplitude of a light. Percent Flicker measurement 0% ~ 100%
The lower the percent flicker, the less substantial the flicker.
Flicker Index Illuminating Engineering Society (IES) A measure of the cyclic variation taking into account the shape of the waveform. Flicker Index measurement 0 ~ 1
The lower the flicker index, the less substantial the flicker.
SVM (Stroboscopic Effect Visibility Measure) PHILIPS & CIE Time domain → frequency domain.
Summation of weighted Fourier components
SVM measurement SVM < 1,Not Visible
SVM > 1,Visible
SVM = 1,Just Visible

Reference:
https://www.designlights.org/news-events/events/stakeholder-meeting-2016/presentation-downloads/temporal-light-artifacts-flicker-and-stroboscopic-effect/

http://www.yidianzixun.com/article/0EmpHcjR

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UPRtek Knowledge - Tech Notes Introduction

United Power Research Technology Corp. is Taiwan supplier and manufacturer in Optoelectronics Industry. UPRtek has been offering our customers high quality Spectrometer, Color Meter, Spectral PAR Meter, Spectral Color Meter, Spectrum, LED Meter, Spectradiometer, LED Measurement, LED light testing since 2010. With both advanced technology and 8 years experience, UPRtek always make sure to meet each customer's demand.


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