摘要
建立了紫外波段漫反射板双向反射分布函数的测量装置,研究了在特定接收条件下铝漫反射板双向反射分布函数(BRDF)随入射角的变化,并对测量误差作了相应的分析,漫反射板定标的相对精度小于2.5%。测量了铝漫反射板从250～650nm的半球反射比。随着波长的增加,铝漫反射板的半球反射比略呈上升趋势,在紫外探测仪的探测波段300～360nm之间变化约6%。监测了铝漫反射板的半球反射比随时间的长期变化。铝漫反射板在制备一年后,其半球反射比基本保持稳定,在紫外探测仪的探测波段300～360nm范围内,其半球反射比平均下降约0.9%。
A bi-directional reflectance distribution function （BRDF） measurement setup in the ultraviolet spectral range was established. The BRDF of the aluminium diffusers at a given orientation was measured. The relative accuracy of the BRDF meas- urement is better than 2. 5 %. The hemispheric reflectance of the aluminium diffusers was measured in the wavelength range from 250 to 650 nm. It increases with the wavelength, and changes about 6% from 300 to 360 nm. It decreases with the time. Since the diffuser was made （about one year ago）, from 250 to 300 nm, the peak decrease in the hemispheric reflectance can reach 2. 6%, and the average decrease is 1.5%. From 300 to 360 nm, it has an average decrease of 0. 9% decrease, and 0. 8% when wavelength is longer than 360 nm.
出处
《光谱学与光谱分析》
SCIE
EI
CAS
CSCD
北大核心
2008年第4期865-869,共5页
Spectroscopy and Spectral Analysis
基金
国家自然科学基金项目(40474051)资助
关键词
漫反射板
定标
双向反射分布函数
半球反射比
数据处理
误差分析
Aluminium diffuser plate
Calibration
Bi-directional reflectance distribution function （BRDF）
Hemispherical reflectance
Data processing
Error analysis
