General V(λ) mismatch index: History, current state and new ideas

U. Krüger; A. Ferrero; A. Thorseth; V. Mantela; A. Sperling

doi:10.1177/14771535231158528

General V(λ) mismatch index: History, current state and new ideas

U. Krüger, A. Ferrero, A. Thorseth, V. Mantela^*, A. Sperling

^*Corresponding author for this work

Department of Information and Communications Engineering

Research output: Contribution to journal › Article › Scientific › peer-review

2 Citations (Scopus)

110 Downloads (Pure)

Abstract

The general V(λ) mismatch index f1′ specifies the mismatch between the relative spectral responsivity of a photometer, and the spectral luminous efficiency function for photopic vision, V(λ). A short review of its historical development explains the reasons for the current definition and which adjustments may be helpful in the future. The properties of the current definition are described in detail. It is very likely that photometers will be calibrated with a white light-emitting diode (LED) light source as the reference in the future. This might involve the need for a more appropriate definition of the general V(λ) mismatch index, either by using a different normalisation in f1′ for the relative spectral responsivity of the photometer or by introducing a different type of function for assessing the mismatch. On the other hand, the measurement of coloured LEDs is also becoming increasingly important. So, is a single general mismatch index for white and coloured light sources sufficient?

Original language	English
Pages (from-to)	420-432
Number of pages	13
Journal	Lighting Research and Technology
Volume	55
Issue number	4-5
Early online date	15 Apr 2023
DOIs	https://doi.org/10.1177/14771535231158528
Publication status	Published - 1 Jun 2023
MoE publication type	A1 Journal article-refereed

Access to Document

10.1177/14771535231158528Licence: CC BY

14771535231158528Final published version, 737 KBLicence: CC BY

Cite this

@article{43c542af3d5843209ae94bc0e7525e22,

title = "General V(λ) mismatch index: History, current state and new ideas",

abstract = "The general V(λ) mismatch index f1′ specifies the mismatch between the relative spectral responsivity of a photometer, and the spectral luminous efficiency function for photopic vision, V(λ). A short review of its historical development explains the reasons for the current definition and which adjustments may be helpful in the future. The properties of the current definition are described in detail. It is very likely that photometers will be calibrated with a white light-emitting diode (LED) light source as the reference in the future. This might involve the need for a more appropriate definition of the general V(λ) mismatch index, either by using a different normalisation in f1′ for the relative spectral responsivity of the photometer or by introducing a different type of function for assessing the mismatch. On the other hand, the measurement of coloured LEDs is also becoming increasingly important. So, is a single general mismatch index for white and coloured light sources sufficient?",

author = "U. Kr{\"u}ger and A. Ferrero and A. Thorseth and V. Mantela and A. Sperling",

note = "Funding Information: The authors disclosed receipt of the following financial support for the research, authorship, and/or publication of this article: This project, 19NRM02 RevStdLED, has received funding from the EMPIR programme co-financed by the participating counties and from the European Union{\textquoteright}s Horizon 2020 research and innovation programme. VM acknowledges partial support by the Academy of Finland Flagship Programme, Photonics Research and Innovation (PREIN), decision number: 320167. ",

year = "2023",

month = jun,

day = "1",

doi = "10.1177/14771535231158528",

language = "English",

volume = "55",

pages = "420--432",

journal = "Lighting Research and Technology",

issn = "1477-1535",

publisher = "SAGE Publications",

number = "4-5",

}

TY - JOUR

T1 - General V(λ) mismatch index: History, current state and new ideas

AU - Krüger, U.

AU - Ferrero, A.

AU - Thorseth, A.

AU - Mantela, V.

AU - Sperling, A.

N1 - Funding Information: The authors disclosed receipt of the following financial support for the research, authorship, and/or publication of this article: This project, 19NRM02 RevStdLED, has received funding from the EMPIR programme co-financed by the participating counties and from the European Union’s Horizon 2020 research and innovation programme. VM acknowledges partial support by the Academy of Finland Flagship Programme, Photonics Research and Innovation (PREIN), decision number: 320167.

PY - 2023/6/1

Y1 - 2023/6/1

N2 - The general V(λ) mismatch index f1′ specifies the mismatch between the relative spectral responsivity of a photometer, and the spectral luminous efficiency function for photopic vision, V(λ). A short review of its historical development explains the reasons for the current definition and which adjustments may be helpful in the future. The properties of the current definition are described in detail. It is very likely that photometers will be calibrated with a white light-emitting diode (LED) light source as the reference in the future. This might involve the need for a more appropriate definition of the general V(λ) mismatch index, either by using a different normalisation in f1′ for the relative spectral responsivity of the photometer or by introducing a different type of function for assessing the mismatch. On the other hand, the measurement of coloured LEDs is also becoming increasingly important. So, is a single general mismatch index for white and coloured light sources sufficient?

AB - The general V(λ) mismatch index f1′ specifies the mismatch between the relative spectral responsivity of a photometer, and the spectral luminous efficiency function for photopic vision, V(λ). A short review of its historical development explains the reasons for the current definition and which adjustments may be helpful in the future. The properties of the current definition are described in detail. It is very likely that photometers will be calibrated with a white light-emitting diode (LED) light source as the reference in the future. This might involve the need for a more appropriate definition of the general V(λ) mismatch index, either by using a different normalisation in f1′ for the relative spectral responsivity of the photometer or by introducing a different type of function for assessing the mismatch. On the other hand, the measurement of coloured LEDs is also becoming increasingly important. So, is a single general mismatch index for white and coloured light sources sufficient?

UR - http://www.scopus.com/inward/record.url?scp=85153314350&partnerID=8YFLogxK

U2 - 10.1177/14771535231158528

DO - 10.1177/14771535231158528

M3 - Article

AN - SCOPUS:85153314350

SN - 1477-1535

VL - 55

SP - 420

EP - 432

JO - Lighting Research and Technology

JF - Lighting Research and Technology

IS - 4-5

ER -

General V(λ) mismatch index: History, current state and new ideas

Abstract

Access to Document

Other files and links

Fingerprint

RevStdLED EMPIR: Revision and extension of standards for test methods for LED lamps, luminaires and modules

PREIN: Photonics Research and Innovation

Cite this

General V(λ) mismatch index: History, current state and new ideas

Abstract

Access to Document

Other files and links

Fingerprint

Projects

RevStdLED EMPIR: Revision and extension of standards for test methods for LED lamps, luminaires and modules

PREIN: Photonics Research and Innovation

Cite this