【摘要】 介绍了第5届全国大学生物理实验竞赛综合研究性实验题A的实验内容,并给出参考解答以及竞赛结果分析.综合研究性实验题A为基于傅里叶变换的频谱测量与应用.基于标量衍射理论,设计了傅里叶变换频谱测量实验,主要包含以坐标纸完成光栅常量的测定和成像透镜焦距的测量,以光强仪与示波器联用完成网格字条纹密度的测量和频谱缩放方法的展现.竞赛结果表明:考生对教学大纲中的基本实验内容掌握较好,但是综合使用常规的探测器和数据采集仪器还存在不足,自主设计和搭建实验装置完成综合性实验的能力欠缺.更多还原

【Abstract】 The experiment content,solution and result analysis of the comprehensive test A of the5 th Chinese Undergraduate Physics Experiment Competition were given.The title of test A was"Frequency spectrum measurement and its application based on Fourier transform".Comprehensive test A was designed based on scalar diffraction theory.The experiment included the measurement of grating constant and focal length of imaging lens on a coordinate paper,and the test of the fringe density of grid word and the frequency spectrum scaling by light intensity meter and oscilloscope.The competition results indicated that the examinee mastered the basic experimental content in the syllabus,but there were still shortcomings in the comprehensive application of conventional detectors and data acquisition instruments,and the ability to design and set up experimental devices independently.更多还原