Concept
Luminous efficacy
Related publications (35)
Discomfort glare from daylight: Influence of transmitted color and the eye's macular pigment
Designing architectural façades that allow sufficient daylight to create visually comfortable and pleasantenvironments is a challenging aspect of building design. It requires accounting for visual comfort anddiscomfort glare risks and understanding the fac ...
EPFL2023Comparison between CIE 2° and 10° field photopic luminosity functions V(λ) for calculating daylight discomfort glare metrics
Marilyne Andersen, Jan Wienold, Sneha Jain
The spectral sensitivity of the average human eye in photopic conditions is represented by the photopic luminosity function V (λ). The CIE has established the photopic luminosity functions for the 2o and 10o visual fields for a standard observer applicable ...
2022Visual comfort without borders: Extending daylight glare prediction to dim daylit environments
Avoiding discomfort glare is one of the critical aspects of maintaining visual comfort, which significantly influences occupants' overall satisfaction with their indoor environment. Discomfort glare prediction models have been developed for various lightin ...
EPFL2022Does glazing color influence our perception of discomfort glare from daylight?
Spectrum and correlated colour temperature of light are shown to influence human visual comfort. Previous research conducted with electric light, mainly in the context of vehicular headlamps, have demonstrated that coloured LEDs induce more discomfort glar ...
2021Validation of Spectral Simulation Tools for the Prediction of Indoor Daylight Exposure
Marilyne Andersen, Clotilde Marie A Pierson
A growing area of research focuses on the relationship between ocular light exposure and the non-visual responses. In order to accelerate research on this topic and improve building design, reliable spectral simulation tools are needed. This study aims at ...
2021Proton-transfer-induced 3D/2D hybrid perovskites suppress ion migration and reduce luminance overshoot
Mohammad Khaja Nazeeruddin, Emad Oveisi, Hobeom Kim
Perovskite light-emitting diodes (PeLEDs) based on three-dimensional (3D) polycrystalline perovskites suffer from ion migration, which causes overshoot of luminance over time during operation and reduces its operational lifetime. Here, we demonstrate 3D/2D ...
2020Application of Fundamental In-Body Radiation Limitations to Practical Design of Antennas for Implantable Bioelectronics
Anja Skrivervik, Denys Nikolayev
Fundamental in-body limitations on achievable radiation efficiency could provide decision-making assistance to engineers working on antennas for implantable bioelectronics. In this study, proof-of-concept conformal microstrip antennas are proposed based on ...
IEEE2020A smart luminaire in an office environment: impact on light distribution, user interactions and comfort
A smart luminaire able to change the direction of its light beam is installed in an office environment and compared to the available LEDs fixtures. Standard lighting measures are performed and a controlled user experiment is conducted, involving 22 subject ...
IOP Publishing Ltd2019Novel illumination strategy for lidar enabled by update in the laser product standards
Federico Matteini, Lucio Carrara
In this article, the authors propose a novel illumination strategy for light detection and ranging (lidar) systems emitting in the retinal hazard region (400 m
AMER INST PHYSICS2018Biocompatible Amphiphilic Hydrogel–Solid Dimer Particles as Colloidal Surfactants
Emulsions of two immiscible liquids can slowly coalesce over time when stabilized by surfactant molecules. Pickering emulsions stabilized by colloidal particles can be much more stable. Here, we fabricate biocompatible amphiphilic dimer particles using a h ...
2017