Near infrared (NIR) spectroscopy is a non-destructive detection technology involving NIR spectral data acquisition and chemometric treatment. The use of an NIR spectrometer is evidently crucial in this regard; however, traditional benchtop NIR spectrometers considerably limit usage scenarios. Accordingly, the miniaturization of spectrometers with high level performance has become a research trend. Various commercial products have been developed, and new techniques have been applied to produce more portable NIR spectrometers. This paper reviews the main types of commercial portable NIR spectrometers and summarizes as well as compares their specifications. Moreover, new techniques for promoting miniaturization and the prospects for future development are introduced.

中文翻译：

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便携式近红外光谱仪回顾：现状和新技术

近红外（NIR）光谱是一种涉及近红外光谱数据采集和化学计量处理的无损检测技术。在这方面，近红外光谱仪的使用显然至关重要。然而，传统的台式 NIR 光谱仪在很大程度上限制了使用场景。因此，具有高性能的光谱仪的小型化已成为研究趋势。已经开发了各种商业产品，并应用了新技术来生产更多的便携式 NIR 光谱仪。本文回顾了商用便携式 NIR 光谱仪的主要类型，并对它们的规格进行了总结和比较。此外，还介绍了促进小型化的新技术和未来的发展前景。