24 September 2005 Optical fibre lighting system for the miniature painting exposition in the National Museum in Warsaw
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Abstract
The National Museum in Warsaw is in possession of a collection of 1100 miniature paintings. Miniature paintings are specific exhibits, since they are both very precious and extremely sensitive to environmental conditions present in the museum exhibition halls. One of the most important factors imposing deterioration of the museum exhibits, is the optical radiation: ultraviolet (UV), visible (VIS) and infrared (IR). Exhibit conservation requirements, concerning the illuminance levels for particularly sensitive museum objects impose strict limitations for illuminance value to 50÷150 lx. Light should be devoid of both UV and IR components. The optical fibre lighting systems are perfectly suited to meet all the above mentioned lighting requirements. Each of 5 showcase featured an illuminator with a 50 W tungsten halogen lamp, UV filter and double IR filter. Thanks to such an illuminator structure, the visual radiation was devoid of harmful radiation components thus it was possible to use plastic optical fibres with 1 mm of diameter without any cooling fans. Fanned illumination systems utilized in the museum conditions, cause significant noise levels. The value of the illumination parameter within the showcases met the targeted value of 100 lx with the average internal showcase temperature raising by less than 1 °C.
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Krzysztof Zaremba, Krzysztof Zaremba, } "Optical fibre lighting system for the miniature painting exposition in the National Museum in Warsaw", Proc. SPIE 5952, Optical Fibers: Applications, 59521N (24 September 2005); doi: 10.1117/12.623048; https://doi.org/10.1117/12.623048
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