转光农膜的光谱特性分析

测试分析了转光农膜的透光值、辐射强度、量子流密度等光谱特性,并给出了北京地区自然光和转光膜透过光的光谱分布。分析表明:转光剂的引入使透光值提高1.39％～1.75％,透过光中紫外光和绿光减少,红光辐射强度提高可达4.69％;提出农膜转光值表征方式,得到620nm处的红光转光值为2.0％～6.9％,340nm的紫外光为—0.5％～—2.7％。北京地区自然光及试验膜透过光辐射分布呈不均匀状态,600～660nm橙红光较为充足,在可见光中占29.16％,绿光占23.11％,而紫外光含量仅占300～1100nm日光辐射的0.27％。

DETERMINATION AND ANALYSIS OF LIGHT CONVERSION AGRICULTURAL FILMS

spectrum properties of light conversion agricultural films about transmittance, radiant intensity quantum current density were determined and analyzed, and spectra distribution of sunlight and transmissible light through the film were given. Analyses show that addition of conversion light agent makes the increasing of transmittance 1. 39%-1. 75%, and decreasing of ultraviolet light and green light, enhancement of radiant intensity of red light 4.69%; The conversion value of red light in 620 nm is increased about 2. 0%-6- 9%, the ultraviolet light in 340 nm is decreased about -0. 5%'--2. 7%. The spectrum distribution of nature light is not uniform, orange red in 600-660 nm is abundant and 29. 16% in rate of visible light and green percent is 23. 11% ?whereas ultraviolet percent is 0. 27% in range of 300--1 100 nm sunlight.