Characterizing Photometric Flicker. Handheld Meters

Leon, Felipe; McIntosh, Joshua A.; Rutz, Addison; Miller, Naomi; Royer, Michael P.

doi:10.2172/1567860

Cited by 1 publication

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“…Phase, offset, sampling rates, and other factors add complexity 73 ; different measurement instruments can yield different values from the same waveform. 40…”

Section: Standards Recommendations Specifications and Regulationsmentioning

confidence: 99%

Flicker: A review of temporal light modulation stimulus, responses, and measures

Miller

Tan

et al. 2022

Lighting Research & Technology

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Flicker has been an important lighting system consideration for over a century. More precise terms are temporal light modulation (TLM) as the stimulus, and responses to TLM as the unwanted visual, cognitive, or physiological consequences. As lighting technology evolved, different forms of TLM emerged, and so did responses to them. Today, some LED systems – encompassing the LED, driver, and control – can result in TLM causing severe unwanted effects, while other LED systems produce no unwanted effects at all. LED systems can deliver a much wider range of luminous waveforms than conventional lighting systems, some exhibiting very high modulation depths. More than any light source before, they can elicit perceptions of the phantom array. Direct flicker effects at modulation frequencies less than about 80 Hz and the stroboscopic effect at frequencies greater than 80 Hz are fairly well understood, but the phantom array effect needs more exploration and characterisation. This review focuses on the technology and research history that led to current metrics for quantifying TLM and human responses to TLM. Visually impaired individuals may exhibit alterations in their response to TLM, but such a discussion is beyond the intent of this review. Thus, the focus is on individuals with normal visual function.

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“…Phase, offset, sampling rates, and other factors add complexity 73 ; different measurement instruments can yield different values from the same waveform. 40…”

Section: Standards Recommendations Specifications and Regulationsmentioning

confidence: 99%

Flicker: A review of temporal light modulation stimulus, responses, and measures

Miller

Tan

et al. 2022

Lighting Research & Technology

View full text Add to dashboard Cite

show abstract

Characterizing Photometric Flicker. Handheld Meters

Cited by 1 publication

References 0 publications

Flicker: A review of temporal light modulation stimulus, responses, and measures

Flicker: A review of temporal light modulation stimulus, responses, and measures

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