应用于土遗址博物馆的太阳能照明装置光学性能研究

摘要

土遗址博物馆的照明是文物保护工作的重要内容之一,文章提出了一种太阳能照明装置,利用气泡对光线的散射作用来实现对土遗址博物馆的自然光照明.文章介绍了该照明装置的工作原理,并在光学暗室中对气泡幕的光线散射性能进行了性能测试,分析了气泡幕厚度、产生气泡的气体压力、入射光照度等对含气泡幕水体的光线透过率、侧表面照度的影响.结果表明,太阳光通过含气泡幕的水体可以对土遗址博物馆内进行照明,光线透过率随产生气泡的气体压力的增大而减小,侧表面照度随产生气泡的气体压力、入射光照度和水中高度的增大而增大,光线透过率与产生气泡的气体压力呈指数函数关系.%The lighting of the earthen sites museum is one of the most complicated issues of cultural heritage conservation.This paper presents a novel solar lighting system,which utilizes the lighting scatter of the bubble film in the water to achieve the day lighting in the earthen sites museum.The operational principle of solar lighting system is introduced.Experimental study was performed to investigate the scattering performance of the bubble films in water.The effect of bubble films thickness,pressure and incident light illuminance on the transmittance rate and scattering illuminance was analyzed.The experimental results indicated that architectures lighting through lighting bubble film in water can be achieved,and the transmittance rate of the light decreased as the increasing water bubble abundance.The photometric of sidewall increased as the increasing pressure,incident light photometric and water body height.The transmittance rate of water body attenuated exponentially with the pressure.