光谱学与光谱分析, 2013, 33 (1): 163, 网络出版: 2013-02-04  

积分光谱法测量塑料薄膜厚度研究

Study on Plastic Film Thickness Measurement by Integral Spectrum Method
作者单位
哈尔滨工业大学仪器科学与技术学科, 黑龙江 哈尔滨150001
摘要
在谱带朗伯定律概念的基础上, 通过分析光束在透过塑料薄膜时光强所发生的变化, 提出了谱带积分透过率定义并建立基于谱带积分透过率的薄膜厚度测量模型。 采用不同厚度的聚丙烯薄膜作为实验对象, 使用光谱仪测量了其光谱透过率。 按上述模型拟合了薄膜厚度与谱带积分透过率关系式。 使用500K理想黑体, 分析了基于此方法研制新型宽谱带塑料薄膜厚度在线检测装置的可行性。 实验结果表明: 使用积分光谱法可以较高精度的测量塑料薄膜厚度。 基于此方法研制的塑料薄膜厚度在线检测装置, 有望解决使用双单色光对比法测薄膜厚度时存在的准确性低、 通用性差的问题。
Abstract
Band integral transmission was defined and plastic film thickness measurement model was built by analyzing the intensity variation when the light passes plastic film, after the concept of band Lambert Law was proposed. Polypropylene film samples with different thickness were taken as the research object, and their spectral transmission was measured by the spectrometer. The relationship between thickness and band integral transmission is fitted using the model mentioned before. The feasibility of developing new broad band plastic film thickness on-line measurement system based on this method was analysed employing the ideal blackbody at temperature of 500 K. The experimental results indicate that plastic film thickness will be measured accurately by integral spectrum method. Plastic film thickness on-line measurement system based on this method will hopefully solve the problems of that based on dual monochromatic light contrast method, such as low accuracy, poor universality and so on.

邱超, 孙晓刚. 积分光谱法测量塑料薄膜厚度研究[J]. 光谱学与光谱分析, 2013, 33(1): 163. QIU Chao, SUN Xiao-gang. Study on Plastic Film Thickness Measurement by Integral Spectrum Method[J]. Spectroscopy and Spectral Analysis, 2013, 33(1): 163.

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