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首页> 外文会议>Conference on reflection, scattering, and diffraction from surfaces >Tunable supercontinuum fiber laser source for BRDF measurements in the STARR II gonioreflectometer
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Tunable supercontinuum fiber laser source for BRDF measurements in the STARR II gonioreflectometer

机译：START II GONIOREFOLECTOMET计的可调谐超连续纤维激光源用于BRDF测量

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STARR II is a planned NIST facility for spectral measurements of specular reflectance and diffuse bidirectionalreflectance distribution function (BRDF) that is the follow-on to the current NIST STARR (Spectral Tri-function Automated Reference Reflectometer) facility. STARR II will improve and expand on the measurement capabilities of STARR, increasing spectral coverage in the short-wave infrared spectral region and adding out-of-plane BRDF measurement capability. We present characteristics of a tunable light source constructed for STARR II, which is based upon a supercontinuum fiber laser and has a tuning range from 500 nm to 2450 nm, alongside those of the current lampbased system in STARR. We then discuss considerations for measuring BRDF using this source. The STARR II goniometer will employ an articulated robotic arm to center and orient the sample, and we calculate the transformations from orientation of the sample and receiver to incident and scattering angles for measurements of in-plane and out-ofplane BRDF. We also present, for the first time, an analytic expression for the correction of measured BRDF to true BRDF due to the finite illumination area and collection aperture, and to the effects of uniformity of illumination. Finally, we present exploratory BRDF measurements on a diffuse sample made using the tunable supercontinnum source.© (2012) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
机译：STARL II是一个计划的NIST设施，用于镜面反射率和漫反应的光谱测量和扩散BIDirectionalRefleflectance分布函数（BRDF），其是当前NIST STARR（光谱三函数自动参考反射计）设施的后续。 STARL II将改善和扩展STARR的测量能力，增加短波红外光谱区域中的光谱覆盖并加入外平面BRDF测量能力。我们呈现用于STARL II构造的可调谐光源的特性，其基于超连续光纤激光器，并且具有500nm至2450nm的调谐范围，以及START的当前灯泡系统的调谐范围。然后，我们讨论使用此来源测量BRDF的考虑因素。 STARL II测电仪将采用铰接式机器人臂以中心和定向样品，并且我们计算样品和接收器的取向的变换，以便在平面内和OUT-OUT-OFPLANE BRDF中测量的入射和散射角度。我们也首次出现了用于校正测量BRDF的分析表达，因为有限照明区域和收集孔径以及照明均匀性的影响。最后，我们在使用可调超细胞素源制成的漫反射样品上呈现探索性BRDF测量。©（2012）照片光学仪表工程师（SPIE）的版权协会。仅供个人使用的摘要下载。

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