Methods for quantitative infrared directional-hemispherical and diffuse reflectance measurements using an FTIR and a commercial integrating sphere

Blake Thomas A.; Johnson Timothy J.; Tonkyn Russell G.; Forland Brenda M.; Myers Tanya L.; Brauer Carolyn S.; Su Yin-Fong; Bernacki Bruce E.; Hanssen Leonard; Gonzalez Gerardo

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Methods for quantitative infrared directional-hemispherical and diffuse reflectance measurements using an FTIR and a commercial integrating sphere

机译：使用FTIR和商业集成球的定量红外方向半球和漫反射测量的方法

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We have developed methods to measure the directional-hemispherical (rho) and diffuse (rho(d)) reflectances of powders, liquids, and disks of powders and solid materials using a commercially available, matte gold-coated integrating sphere and Fourier transform infrared spectrometer. To determine how well the sphere and protocols produce quantitative reflectance data, measurements were made of three diffuse and two specular standards prepared by the National Institute of Standards and Technology (NIST), LabSphere Infragold and Spectralon standards, hand-loaded sulfur and talc powder samples, and water. Relative to the NIST measurements of the NIST standards, our directional hemispherical reflectance values are within +/- 4% for four of the standards and within +/- 7% for a low reflectance diffuse standard. For the three diffuse reflectance NIST standards, our diffuse reflectance values are within +/- 5% of the NIST values. For the two specular NIST standards, our diffuse reflectance values are an order of magnitude larger than those of NIST, pointing to a systematic error in the manner in which diffuse reflectance measurements are made for specular samples using our methods and sphere. Sources of uncertainty are discussed in the paper. (c) 2018 Optical Society of America

机译：我们开发了测量定向半球（RHO）和散射（RHO（d））的粉末，液体和固体材料的反射的方法，使用市售的哑光金涂层集成球体和傅里叶变换红外光谱仪的粉末，液体和固体材料的反射。为了确定球体和协议产生定量反射数据的程度，由国家标准和技术研究所（NIST），Labsphere InfraGold和Spectralon标准，手工硫和滑石粉样品制成的三个弥漫性和两种镜面标准进行测量和水。相对于NIST标准的NIST测量，我们的定向半球形反射率值在4个标准中+/- 4％，并且在低反射率漫反射标准中+/- 7％。对于三个漫反射NIST标准，我们的漫反射值在NIST值的+/- 5％内。对于两个镜面NIST标准，我们的漫反射值是大于NIST的数量级，指向使用我们的方法和球体对镜面样品进行散射反射测量的方式的系统误差。本文讨论了不确定性的来源。（c）2018年光学学会

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《Applied optics》 |2018年第3期|共15页
作者
Blake Thomas A.; Johnson Timothy J.; Tonkyn Russell G.; Forland Brenda M.; Myers Tanya L.; Brauer Carolyn S.; Su Yin-Fong; Bernacki Bruce E.; Hanssen Leonard; Gonzalez Gerardo;
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Pacific Northwest Natl Lab 902 Battelle Blvd Richland WA 99354 USA;

Pacific Northwest Natl Lab 902 Battelle Blvd Richland WA 99354 USA;

Pacific Northwest Natl Lab 902 Battelle Blvd Richland WA 99354 USA;

Pacific Northwest Natl Lab 902 Battelle Blvd Richland WA 99354 USA;

Pacific Northwest Natl Lab 902 Battelle Blvd Richland WA 99354 USA;

Pacific Northwest Natl Lab 902 Battelle Blvd Richland WA 99354 USA;

Pacific Northwest Natl Lab 902 Battelle Blvd Richland WA 99354 USA;

Pacific Northwest Natl Lab 902 Battelle Blvd Richland WA 99354 USA;

NIST Opt Technol Div Gaithersburg MD 20899 USA;

Alecam FTIR Serv &

Consulting The Woodlands TX 77381 USA;

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Methods for quantitative infrared directional-hemispherical and diffuse reflectance measurements using an FTIR and a commercial integrating sphere

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