Mousavi Payam, Haran Frank, Jez David, Santosa Fadil, Dodge John Steven
Department of Physics, Simon Fraser University, 8888 University Drive, Burnaby, British Columbia, V5A 1S6, Canada.
Appl Opt. 2009 Nov 20;48(33):6541-6. doi: 10.1364/AO.48.006541.
We present a noncontact method for quantitative composition and thickness monitoring of flat sheet products using terahertz time-domain spectroscopy. We apply the method to obtain simultaneous measurement of thickness and moisture content of paper sheets. The paper is modeled as an effective medium of water mixed with fibers, and model parameters are estimated from fits to the measured transmission amplitude. We demonstrate the method on two different paper samples and obtain uncertainties that are comparable with existing sensor technology. Monte Carlo simulations indicate that these uncertainties can be reduced further by at least an order of magnitude.
我们提出了一种使用太赫兹时域光谱技术对平板产品进行定量成分和厚度监测的非接触方法。我们应用该方法同时测量纸张的厚度和水分含量。纸张被建模为水与纤维混合的有效介质，并根据对测量的传输幅度的拟合来估计模型参数。我们在两种不同的纸张样品上演示了该方法，并获得了与现有传感器技术相当的不确定性。蒙特卡罗模拟表明，这些不确定性可以进一步降低至少一个数量级。
