遮阳伞布透过率的测量方法探究  

Measurement of transmittance of umbrella cloth

作　　者：胡啸[1] 王春梅[1] 沈国土[1] 

机构地区：[1]华东师范大学物理与材料科学学院,上海200241

出　　处：《物理实验》2017年第2期43-45,48,共4页Physics Experimentation

摘　　要：设计出一种遮阳伞的抗紫外线性能测定的简易方法,实用性高.采用WG-8A型光栅光谱仪、溴钨灯、衰减片等器材,通过测量中间量——中性衰减片透过率来扩大透过率可测波长范围,间接计算出样品伞布的透过率.通过透过率进一步计算样品的紫外线防护系数.可开发出一个联系实际生活的实验,提升学生学习近物实验的兴趣.A method of measuring the ultraviolet protection factor of the umbrella was suggested.In the experiment,the WG-8Agrating spectrometer,bromine tungsten lamp,dimmer glass and other equipment were used,and the transmittance of the sample umbrella cloth was calculated indirectly by measuring the transmittance of the dimmer glass which was called the intermediate measured value.That helped us to expand the measurement range of the transmittance.By analyzing the transmittance,the ultraviolet protection factor of the sample was obtained.This experiment,by combining the modern physical experiment with real life,could enhance the students＇ interest.

关 键 词：光栅光谱仪 紫外线防护系数 透过率 中性衰减片 中间量 

分 类 号：O436.2[机械工程—光学工程]