一种新颖简易的方法测量红外线及可见光的波长
吴显云,张 容,赵 威,李盈盈,许 灯
成都师范学院 物理与工程技术学院,四川 成都 611130
A Novel and Simple Method for Measuring the Wavelength of Diodes
WU Xianyun,ZHANG Rong,ZHAO Wei,LI Yingying,XU Deng
摘要
将发光二极管(LED)及红外线二极管(IRED)并联放在平台上,并在二极管旁边放置一把刻度尺,在数码显微镜的 CMOS 镜头前放置一片透射光栅。 逐渐调高连接二极管的电压,电脑显示屏上会首先出现 IRED 的白色亮点,接着出现 LED 的红色亮点,最后出现 LED 的蓝色亮点。 直接从屏上测量相邻两亮点间的距离,可以测量红外线和可见光的波长,使用该装置测量 IRED 红外线及 LED可见光的波长,其结果与参考值符合得很好,误差在0.7%以内。 该装置具有简易、精度高、成本低廉等优点,除了可以作为演示教学外,还可以让学生分组操作实验。
关键词:
数码显微镜
红外线
CMOS
透射光栅
Abstract:
When light emitting diodes and an infrared emitting diode are connected in parallel circuits and puton the platform,we can find the color spots of the LEDs and a white spot of the IRED on the computer screen. As a transmission grating is placed in front of the lens of the digital microscope ,a series of diffraction patternsare shown on the screen,We can measure the wavelengths of the LEDs and the lRED directly from the screen.Using this device to measure the wavelength of IRED infrared and lED visible light , the result is in goodagreement with the reference value , and the error is within 0.7%.The device has the advantages of simplicity,high accuracy and low cost. ln addition to being used as demonstration teaching,it can also allow students tooperate experiments in groups.
Key words:
digital microscope
infrared
CMOS
transmission grating
出版日期: 2023-06-25
发布日期: 2023-06-25
整期出版日期: 2023-06-25
引用本文:
吴显云, 张 容, 赵 威, 李盈盈, 许 灯.
一种新颖简易的方法测量红外线及可见光的波长
[J]. 大学物理实验, 2023, 36(3): 55-58.
WU Xianyun, ZHANG Rong, ZHAO Wei, LI Yingying, XU Deng.
A Novel and Simple Method for Measuring the Wavelength of Diodes
. Physical Experiment of College, 2023, 36(3): 55-58.
链接本文:
http://dawushiyan.jlict.edu.cn/CN/10.14139/j.cnki.cn22-1228.2023.03.011
或
http://dawushiyan.jlict.edu.cn/CN/Y2023/V36/I3/55
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