glare

Visual comfort is important to the wellbeing of people and their productivity. However, too much light in the field of view can cause discomfort and disability glare. Under certain conditions it can even cause accidents. This paper addresses the disability glare created by veiling glare and the effect it may have of reducing the visual performance in outdoor spaces. Veiling glare is a particular case when light is reflected off a surface and causes annoyance or impairment of a task to the person in a particular view angle.

The presented study describes a method for evaluating control strategies for shading devices.

In this paper, we present the luminance calibration of the Coolpix 990, a digital camera made by Nikon. We test the different settings of the camera and choose which ones will be adapted to the calibration procedure. We characterize the projection resulting from the fish-eye lens made by Nikon for this camera. After this, the procedure and the experimental set-up used to calibrate it are detailed. We show how we used both an artificial sky and a sky luminance scanner to allow the calibration on the all EV (Exposure Value) scale.

We are developing a model that is able to predict the most adapted venetian blinds position (slat angle) for a VDU office worker, considering visual comfort matters. This algorithm, which takes into account room parameters as well as visual comfort criterions, is being validated by an in-situ measurement campaign. During 8 months, two field studies are lead to understand the way that office-workers actually use their blinds.