摘要
利用激光照射高折射率玻璃微珠下形成的二次彩虹现象,以艾里的虹理论为基础对玻璃微珠折射率进行了测量。推导了玻璃微珠尺寸对折射率影响的计算公式,表明半径差异在10μm时,折射率的测量误差为10^(-3)数量级。此外,通过软件模拟计算玻璃微珠的二次彩虹现象,并对微珠的折射率进行了测量,验证了二次彩虹方法的正确性,同时也表明玻璃微珠半径的变化对最小偏向角位置的偏移影响很小。实际测量结果表明,折射率随着半径的减小而增大,但是折射率变化很小,因此,引入折射率测量误差较小。统计测量方法能为玻璃微珠折射率的准确测量提供可靠的依据。
The phenomenon of secondary rainbow when the high refractive glass beads is illuminated by laser is used to measure the refractive index of glass beads based on Airy rainbow theory. The formula of relationship between size and refractive index glass beads indicate that measurement error of the refractive index is about 10^-3 order of magnitude with difference in radius 10 um. Simulating secondary, rainbow and measuring refractive index verify the correctness of the method of secondary rainbow, and indicate the variations in the radius of glass beads slightly affect on the position of the minimum deviation angle of glass beads. Actual measurements show that the refractive index increases as the radius decreases by a small change in the refractive index. Therefore, the measurement error of refractive index is negligible, and statistical measurement can provide a reliable evidence for the accurate measurement of the refractive index of glass beads.
出处
《光学与光电技术》
2011年第6期45-49,共5页
Optics & Optoelectronic Technology
基金
2008年质检公益性行业科研专项项目"<道路逆反射玻璃珠测试方法>国际标准研制"(200810466)资助项目
关键词
高折射率玻璃微珠
二次彩虹
最小偏向角
ASAP模拟
high refractive glass beads
secondary rainbow
minimum deviation angle
ASAP simulation
