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Methods for absolute reflectance measurement of transmissive materials in the infrared

机译:红外透射材料的绝对反射率测量方法

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Abstract: Four methods for the measurement of absolute reflectance are described and compared, with particular emphasis on application to transmissive materials such as windows and filters. Three of the methods, the 'V-W,' 'V-N,' and goniometer based methods, have been in use for a number of years. The fourth is an integrating sphere method. The sphere system is used for both specular and diffuse samples but achieves its greatest accuracy in the measurement of specular reflectance and transmittance. A direct comparison of the sphere and goniometer methods is made on samples in the infrared spectral region. !12
机译:摘要:描述并比较了四种测量绝对反射率的方法,特别强调了在透射材料(例如窗户和滤光片)上的应用。基于“ V-W”,“ V-N”和测角仪的三种方法已经使用了很多年。第四个是积分球法。球面系统既可用于镜面反射样品,也可用于漫射样品,但在测量镜面反射率和透射率时可达到最高的精度。在红外光谱范围内的样品上进行了球面法和测角仪方法的直接比较。 !12

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