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Universidade do Porto Faculdade de Letras da Universidade do Porto Serviços de Documentação e Informação
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Lights on... Cultural heritage and museums!
#Physical principles on the illumination of displayed museum objects
Luís Miguel Bernardo
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#Abstract
The illumination of displayed museum objects must fulfil basic requirements such as the established conservation rules, aesthetic values and the visitors’ viewing expectations. Therefore, choosing the right intensity and spectral colours of those objects’ illumination is a very demanding task to curators, light designers and engineers. For a correct decision, the basic principles of white light composition, the light interaction with the materials, the measurement of the intensity and colours, and the human visual perception must necessarily be considered. The spectral analysis and synthesis of white light are particularly relevant to understand the objects’ physical colours. The use of a particular spectral composition may be constrained by the object conservation restrictions and the public aesthetic and visual expectations and therefore alternative choices must be considered to overcome those possible incompatibilities. Radiometric and colorimetric measurements must be made to characterize the illumination conditions and establish the best set-up. The physical observation conditions must be evaluated through the knowledge of the reflection, transmittance, absorption and scattering phenomena, affecting colours and intensities. Finally, the physiological effects of a particular illumination on the human vision have to be evaluated through the principles of photometry and human vision physiology.
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Data da última atualização: 2021-02-24

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