数字化光栅光谱仪以及在食品色素测量中应用  

Digital Grating Spectrometer and Its Application in Food Pigment Measurement

作　　者：许星然 代楚鑫 杨太群 陈雷 XU Xingran;DAI Chuxin;YANG Taiqun;CHEN Lei(School of Science,Jiangnan University,Wuxi 214122,China;School of Information,Hunan University of Humanities,Science and Technology,Loudi 417000,China)

机构地区：[1]江南大学理学院物理实验中心,江苏无锡214122 [2]湖南人文科技学院信息学院,湖南娄底417000

出　　处：《大学物理实验》2024年第5期103-106,共4页Physical Experiment of College

基　　金：中央高校基本科研业务费专项资金资助(JUSRP123027);国家自然科学基金项目(12264061);江南大学2024年本科教育教学改革研究项目(公共基础课程教学质量提升专项)(14)。

摘　　要：利用树莓派的数字可视化优势,结合其轻便和便携的特性,对大学物理实验中的光栅光谱仪测量方案进行了改进。通过自主编写Python程序,用蓝色和绿色两种单色光源,确定了视场中可见光谱的波长,并计算了不同波长光线的衍射角度。此外,通过连接自制的光栅光谱仪和数字摄像头,成功在树莓派屏幕上显示出不同色素浓度下的光谱分布情况。在实验过程中,根据测量得到的吸光度光谱图像和色素浓度数据,数据拟合得到了吸光度与色素浓度之间的函数关系。这种改进的测量方案不仅提高了实验的准确性和便捷性,还为学生提供了一个直观的学习平台,有助于他们更好地理解和掌握光谱学原理及其在物理实验中的应用。Leveraging the digital visualization capabilities of the Raspberry Pi,combined with its portability and ease of use,the measurement scheme for grating spectrometry in university physics experiments has been improved.By independently writing Python programs and utilizing blue and green monochromatic light sources,the wavelengths of the visible spectrum within the field of view were determined,and the diffraction angles of light of different wavelengths were calculated.Additionally,by connecting a homemade grating spectroscope and digital camera,the spectral distribution under different pigment concentrations was successfully displayed on the Raspberry Pi’s screen.During the experiment,based on the measured absorbance spectrum and pigment concentration data,a functional relationship between absorbance and pigment concentration was fitted.It measurement scheme not only enhances the accuracy and convenience of the experiment but also provides students with an intuitive learning platform.It helps them to better understand and grasp the principles of spectroscopy and its application in physics experiments.

关 键 词：透射光栅 色素测定 树莓派 光谱仪 

分 类 号：O4-33[理学—物理]