Abstract The advent of broadband supercontinuum (SC) light sources offers an opportunity to improve techniques such as reflectance spectroscopy. In this study, a SC laser, providing a broad spectral bandwidth and higher-intensity light than traditional halogen lamps, is used to illuminate mineral samples in the short-wavelength infrared (SWIR; 1.10–2.35 μm) spectrum. To overcome speckle interference originating from the intrinsic coherence of the SC laser illumination, a rotation-based technique is applied to achieve high signal-to-noise interference-free reflectance spectra of the three minerals studied (muscovite, kaolinite and calcite) and these spectra are compared to reference spectra obtained from the United States Geological Survey spectral library. We report a speckle magnitude, σ Spk 99%. The benefits and limitations of using SC laser illumination over halogen lamp illumination are discussed with regards to the measurement time, speckle, laser operation safety and cost. The technique described could be used for time-efficient (

中文翻译：

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通过超连续谱照明和散斑减少对矿物的短波红外反射光谱

摘要 宽带超连续谱 (SC) 光源的出现为改进反射光谱等技术提供了机会。在这项研究中，SC 激光器提供比传统卤素灯更宽的光谱带宽和更高强度的光，用于在短波长红外（SWIR；1.10–2.35 μm）光谱中照亮矿物样品。为了克服源自 SC 激光照明内在相干性的散斑干扰，应用基于旋转的技术来实现所研究的三种矿物（白云母、高岭石和方解石）的高信噪比无干扰反射光谱和这些光谱与从美国地质调查局光谱库获得的参考光谱进行比较。我们报告散斑大小，σ Spk 99%。从测量时间、散斑、激光操作安全性和成本方面讨论了使用 SC 激光照明相对于卤素灯照明的优势和局限性。所描述的技术可用于节省时间（