A PRACTICAL MODEL FOR MESOPIC PHOTOMETRY

Teresa Goodman, Alistair Forbes, Helen Walkey

Abstract

This article reports the results of a multinational research project investigating visual performance in halflight (mesopic) conditions. From the experimental investigations using reaction time, detection threshold and recognition contrast threshold techniques, the results were used to develop a system for practical mesopic photometry, which provides an acceptably good fit to the experimental data and is also suitable for practical implementation by the lighting industry. A major feature of the model is that it can be implemented in terms of photopic and scotopic luminance measurements, measurements that can easily be made in practice.

Keywords

mesopic photometry, visual performance

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PWC-2006-TC18-002u.pdf

DOI

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IMEKO TC

TC18 - Measurement of Human Functions

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