The Influence of the Geometry Design Parameter for the Grating Construction of Light Source to the Uniform Illuminance

[[abstract]]隨著消費者對眼睛健康的要求越來越高，特別是學習期間的學童，家長對於燈具在照明品質上的要求極為重視，「高亮度、高均勻度」的照明燈具之設計已成為燈具產業的重要項目之一。 目前市面上針對防眩光增加舒適度做設計訴求的檯燈有三種方式，一種是從光源的燈管本身著手，另一種是裝上濾光膜，還有一種則是裝上格柵來阻光使其均勻已達到近似防眩光的目的。本研究係針對第三種，亦即加裝格柵的方式來探討各種疏密程度與幾何形狀對其照度之影響。利用光學軟體「LightTools」，將各種不同幾何因子，建構在軟體中，進行模擬並分析各種因子對光照度及均勻度的影響。 經過本研究的模擬與分析，可知格柵彎曲角度10度對均勻度最好，厚度則大部份型態以15mm對均勻度最佳，材質反射率90%以上對於均勻度的提升有比較好效果。[[abstract]]For the eye health, lights with high illuminance quality have been requested obviously by the consumer, especially the parents who have the children in learning. Therefore, to design the lights with high illumination and uniform has become one of the important courses in the development light industry. Recently, there are three approaches that are used to design the lamps aiming at the uniform of the light source in the market. One is to be solved by the tube of the light-source, the other is to cover the light with the filter, and another is to attach with the grating construction and preventing from strong light for the purpose of uniform. In this research the last approach is aimed. Grating constructions with different density and geometry shapes are simulated on the software called "Light Tools" to analyze the effect of illumination and uniform. Through the simulation and analysis of this research, we have some results as following: the best grating curving angle to the uniform is 10 degree; the proper thickness to the uniform is 15mm; and it is useful to the promotion of the uniform, if the reflection rate of the material is over 90%