Abildgaard Otto Højager Attermann, Frisvad Jeppe Revall, Falster Viggo, Parker Alan, Christensen Niels Jørgen, Dahl Anders Bjorholm, Larsen Rasmus
Appl Opt. 2016 May 10;55(14):3840-6. doi: 10.1364/AO.55.003840.
Diffuse reflectance measurements are useful for noninvasive inspection of optical properties such as reduced scattering and absorption coefficients. Spectroscopic analysis of these optical properties can be used for particle sizing. Systems based on optical fiber probes are commonly employed, but their low spatial resolution limits their validity ranges for the coefficients. To cover a wider range of coefficients, we use camera-based spectroscopic oblique incidence reflectometry. We develop a noninvasive technique for acquisition of apparent particle size distributions based on this approach. Our technique is validated using stable oil-in-water emulsions with a wide range of known particle size distributions. We also measure the apparent particle size distributions of complex dairy products. These results show that our tool, in contrast to those based on fiber probes, can deal with a range of optical properties wide enough to track apparent particle size distributions in a typical industrial process.
漫反射测量对于诸如降低散射系数和吸收系数等光学特性的非侵入性检测很有用。这些光学特性的光谱分析可用于颗粒尺寸测量。基于光纤探头的系统通常被采用，但其低空间分辨率限制了它们在系数方面的有效范围。为了覆盖更广泛的系数范围，我们使用基于相机的光谱斜入射反射测量法。我们基于这种方法开发了一种用于获取表观粒度分布的非侵入性技术。我们的技术通过使用具有广泛已知粒度分布的稳定水包油乳液进行了验证。我们还测量了复杂乳制品的表观粒度分布。这些结果表明，与基于光纤探头的工具相比，我们的工具能够处理足够广泛的光学特性范围，以跟踪典型工业过程中的表观粒度分布。
