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LEUKOS
The Journal of the Illuminating Engineering Society
Volume 19, 2023 - Issue 4
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Research Article

A Grid in Perspective for Road Lighting Calculations

Florian Greffiera Light and Lighting Research Team, Cerema, Les Ponts-de-Cé, FranceORCID Iconhttps://orcid.org/0000-0001-7745-6629View further author information
ORCID Icon,
Vincent Bouchera Light and Lighting Research Team, Cerema, Les Ponts-de-Cé, FranceCorrespondence[email protected]
ORCID Iconhttps://orcid.org/0000-0003-2299-4168View further author information
ORCID Icon,
Valérie Muzetb ENDSUM Research Team, Cerema, Strasbourg, FranceORCID Iconhttps://orcid.org/0000-0002-0026-6592View further author information
ORCID Icon,
Sandy Buschmannc Lighting Technology, Technische Universität Berlin, Berlin, GermanyView further author information
&
Stephan Völkerc Lighting Technology, Technische Universität Berlin, Berlin, GermanyView further author information
Pages 389-404 | Received 13 Apr 2022, Accepted 08 Oct 2022, Published online: 15 Dec 2022

Figures & data

Fig. 1. Standard grid definition.

Fig. 1. Standard grid definition.

Fig. 2. Luminance measurement map from the standard observer’s perspective.

Fig. 2. Luminance measurement map from the standard observer’s perspective.

Fig. 3. Ellipses projection from observer’s eye.

Fig. 3. Ellipses projection from observer’s eye.

Fig. 4. Points coordinates within the grid in perspective (ApL = 2’, ApT = 20’).

Fig. 4. Points coordinates within the grid in perspective (ApL = 2’, ApT = 20’).

Fig. 5. Mask of the grid in perspective seen by the observer (ApL = 2’, ApT = 20’).

Fig. 5. Mask of the grid in perspective seen by the observer (ApL = 2’, ApT = 20’).

Table 1. Lighting quality criteria calculations with classical and perspective grid.

Fig. 6. Measured grid by method b. (left) and calculated grid (right) for the 60 CIE points.

Fig. 6. Measured grid by method b. (left) and calculated grid (right) for the 60 CIE points.

Fig. 7. Measured grid (left) and calculated grid (right) using the grid in perspective.

Fig. 7. Measured grid (left) and calculated grid (right) using the grid in perspective.

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