Hom James, Chigier Norman
Department of Mechanical Engineering, Carnegie Mellon University, Pittsburgh, Pennsylvania 15213-3800, USA.
Appl Opt. 2002 Apr 1;41(10):1899-907. doi: 10.1364/ao.41.001899.
The capabilities and limitations of rainbow refractometry, specifically the minimum measurable droplet size and the errors in the refractive index (temperature), have been studied. We evaluate what we believe is a new method of indirectly applying the Lorenz-Mie theory to rainbow refractometry. The results show that this new method reduces the errors and eliminates the biases that may occur if the Airy theory is used. A more precise method to filter the high-frequency oscillations associated with the measurement signals was developed. Finally, it was discovered that the errors associated with rainbow refractometry are such that a single droplet measurement is unreliable. A mean refractive index should be determined on the basis of multiple droplet measurements.
研究了彩虹折射测量法的能力和局限性，特别是最小可测量液滴尺寸以及折射率（温度）误差。我们评估了一种我们认为将洛伦兹 - 米氏理论间接应用于彩虹折射测量法的新方法。结果表明，这种新方法减少了误差，并消除了使用艾里理论时可能出现的偏差。开发了一种更精确的方法来过滤与测量信号相关的高频振荡。最后发现，与彩虹折射测量法相关的误差使得单次液滴测量不可靠。应基于多次液滴测量来确定平均折射率。
