摘要
基于热透镜效应,设计搭建实验光路,利用不同波长具有高斯分布的激光束透射过不同种类的酱油薄膜,结合稳态吸收光谱探究了多种变量如何影响酱油薄膜热透镜焦距的变化。通过研究,建立了样品热透镜效应的焦距测量公式,该公式验证了Gordon经验公式,并由此测量计算的焦距可以准确地判断出酱油样品的品级及质量,此种测量方法也可以延伸到其他有色化学物质的鉴定与分析。该实验所需设备及材料均简单易得,且实验结果的可重复性及应用价值高,可作为大学物理实验课程中的拓展实验,不仅能够提高学生学习兴趣,还可拓宽学生的知识面与培养学生的综合创新能力。
Based on the thermal lens effect,an experimental optical path was designed and built.The laser beams with Gaussian distribution at different wavelengths were transmitted through different types of soy sauce films.And the steady-state absorption spectrum was used to explore how to various variables make the soy sauce film thermal lens focal length changes.Through the research,the focal length measurement formula of the thermal lens effect of the samples was established,from which the grade and quality of the soy sauce samples could be accurately determined,and this measurement method could also be extended to the identification and analysis of other colored chemicals.This can be used as an extended experiment in college physics experiment courses,because of the equipment and materials required for this experiment are common in the laboratory and daily life,and the repeatability and application value of the experimental results are extremely high.This can not only improve the students of their interest in learning,but also cultivate comprehensive innovation ability with multiple knowledge pointsofstudents.
作者
段彬
翟猛
马式跃
汪倩竹
DUAN Bin;ZHAI Meng;MA Shiyue;WANG Qianzhu(College of Physics,Jilin University,Changchun 130022,China)
出处
《实验室研究与探索》
CAS
北大核心
2021年第3期181-185,共5页
Research and Exploration In Laboratory
基金
国家自然科学基金项目(11974142)
吉林大学本科教学改革研究项目(2019xyB103)。
关键词
热透镜效应
酱油薄膜
激光
焦距
实验教学
thermal lens effect
soy sauce film
laser
focal length
experimental teaching
