Beat flicker : a temporal light artefact due to multiple sources of time modulated light
(2019) 29th Quadrennial Session of the CIE p.1179-1186- Abstract
- Metrics of temporal light artefacts (TLAs) are tools meant to quantify the magnitude of the impact of temporal modulated light generated by light sources. However, as lighting systems are becoming more and more complex, just assigning a TLA metrics to a light source is not necessarily an easy task. For example, a luminaire containing two drivers operating on slightly different frequencies could generate a light intensity waveform, resulting in some TLA values at one moment, and different TLA values at another moment. In acoustics, the corresponding phenomena would be two tones with slightly different frequencies, giving rise to something called “beats”. The authors of this paper therefore calls the “light”-version of this phenomena beat... (More)
- Metrics of temporal light artefacts (TLAs) are tools meant to quantify the magnitude of the impact of temporal modulated light generated by light sources. However, as lighting systems are becoming more and more complex, just assigning a TLA metrics to a light source is not necessarily an easy task. For example, a luminaire containing two drivers operating on slightly different frequencies could generate a light intensity waveform, resulting in some TLA values at one moment, and different TLA values at another moment. In acoustics, the corresponding phenomena would be two tones with slightly different frequencies, giving rise to something called “beats”. The authors of this paper therefore calls the “light”-version of this phenomena beat flicker. The objective of the present work is to draw attention to a challenge that might arise, when assessing temporal modulated light, using tools currently available. The presence of beat flicker could be such a challenge to handle. (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/129e7b7a-030d-494c-8be7-74725f8103a9
- author
- Lindén, Johannes LU ; Dam-Hansen, Carsten and Thorseth, Anders
- publishing date
- 2019
- type
- Chapter in Book/Report/Conference proceeding
- publication status
- published
- subject
- keywords
- Flicker, Temporal Light Artefacts, Temporal Modulated Light, Stroboscopic effects, Stroboscopic Visibility Measure, Flicker Index, Modulation depth, Multiple sources, Beat Flicker
- host publication
- Proceedings of the 29th CIE SESSION Washington D.C., USA, June 14 – 22, 2019
- pages
- 8 pages
- publisher
- CIE - International Commission on Illumination
- conference name
- 29th Quadrennial Session of the CIE
- conference location
- Washington DC, United States
- conference dates
- 2019-06-14 - 2019-06-22
- DOI
- 10.25039/x46.2019.PO079
- language
- English
- LU publication?
- no
- additional info
- International Commission on Illumination Session, CIE 2019 ; Conference date: 18-06-2019 Through 22-06-2019
- id
- 129e7b7a-030d-494c-8be7-74725f8103a9
- alternative location
- http://washington2019.cie.co.at/
- date added to LUP
- 2023-06-16 17:23:29
- date last changed
- 2023-06-28 14:07:30
@inproceedings{129e7b7a-030d-494c-8be7-74725f8103a9, abstract = {{Metrics of temporal light artefacts (TLAs) are tools meant to quantify the magnitude of the impact of temporal modulated light generated by light sources. However, as lighting systems are becoming more and more complex, just assigning a TLA metrics to a light source is not necessarily an easy task. For example, a luminaire containing two drivers operating on slightly different frequencies could generate a light intensity waveform, resulting in some TLA values at one moment, and different TLA values at another moment. In acoustics, the corresponding phenomena would be two tones with slightly different frequencies, giving rise to something called “beats”. The authors of this paper therefore calls the “light”-version of this phenomena beat flicker. The objective of the present work is to draw attention to a challenge that might arise, when assessing temporal modulated light, using tools currently available. The presence of beat flicker could be such a challenge to handle.}}, author = {{Lindén, Johannes and Dam-Hansen, Carsten and Thorseth, Anders}}, booktitle = {{Proceedings of the 29th CIE SESSION Washington D.C., USA, June 14 – 22, 2019}}, keywords = {{Flicker; Temporal Light Artefacts; Temporal Modulated Light; Stroboscopic effects; Stroboscopic Visibility Measure; Flicker Index; Modulation depth; Multiple sources; Beat Flicker}}, language = {{eng}}, pages = {{1179--1186}}, publisher = {{CIE - International Commission on Illumination}}, title = {{Beat flicker : a temporal light artefact due to multiple sources of time modulated light}}, url = {{http://dx.doi.org/10.25039/x46.2019.PO079}}, doi = {{10.25039/x46.2019.PO079}}, year = {{2019}}, }