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INVESTIGATING MULTIPLE GLARE SOURCES IN DAYLIT CONDITIONS

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Understanding View Direction in Relation to Glare in Daylit Offices

Marilyne Andersen, Mandana Sarey Khanie

Visual comfort is one of the main concerns for the integration of daylighting strategies in workspaces. Depending on the occupants’ seating position, light distribution in the field-of-view (FOV) can range from interesting highlights to visually discomfort ...

2013

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Suboptimal light distribution in a room can cause visual discomfort and glare. Next to rods and cones, perception of light is also governed by a third class of photoreceptors, important for circadian rhythm regulation and non-visual functions such as alert ...

EPFL Solar Energy and Building Physics Laboratory (LESO-PB)2013

Effects of prior light exposure on early evening performance, subjective sleepiness, and hormonal secretion

Jean-Louis Scartezzini, Mirjam Münch, Friedrich Linhart, Apiparn Borisuit

In sighted humans, light intensity, timing, exposure duration, and spectral composition of light are important to entrain the endogenous circadian pacemaker to the 24-h day-night cycle. We tested the impact of two realistic office lighting conditions durin ...

American Psychological Association2012

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High dynamic range imaging has been shown to be a reliable tool to assess luminance maps and glare risk probability in buildings. However, there are some limitations of image capturing time, especially when dealing with highly dynamic and contrasted daylig ...

Spie-Int Soc Optical Engineering2012

Model for view direction as a function of light distribution

Mandana Sarey Khanie

Discomfort Glare: - Focus on understanding discomfort glare - Embedding eye‐movement patterns in glare assessments - Refining glare position index. Problem: - The light of sight in glare position index is assumed to be fixed - In a natural experience, line ...

2011

Advanced daylighting systems can be effective in increasing light levels in building spaces and reducing energy consumption due to electric lighting. However, a recurring issue found in most existing daylighting systems is the necessity of coupling the lig ...

2011

Within the last decades it became evident that light through the eyes is essential for both visual and non-visual functions. One of the most important non-visual functions of light is the daily entrainment of the circadian clock by environmental light cond ...

2011

Energetic, Visual and Non-Visual Aspects of Office Lighting

Friedrich Linhart

Light has important visual and non-visual effects on humans and high-quality light should therefore be supplied inside buildings in sufficient quantities. On the other hand, artificial lighting is responsible for a large part of an office building's electr ...

EPFL2010

The combined integration of daylighting and electric lighting systems within buildings --also designated by the term “Green lighting”, which is a recent issue for the lighting research community-- allows achieving better lighting conditions for building oc ...

Earthscan2010

The Adaptation of Daylight Glare Probability to Dynamic Metrics in a Computational Setting

Marilyne Andersen

Because nearly all existing glare equations depend on source size, relative position, and luminance, predicting glare in daylighting software generally requires the pixel-processing of a rendered image meant to reproduce a human’s view. When considering mu ...

2009