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course:interesting_problems:2020:topic11:start [2019/10/23 09:20] whyx |
course:interesting_problems:2020:topic11:start [2020/01/16 10:51] (当前版本) 鸟雀呼晴 [参与学生] |
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===== 课题内容 ===== | ===== 课题内容 ===== | ||
- | Shine a laser beam onto a dark surface. A granular pattern can be seen inside the spot. When the pattern is observed by a camera or the eye, that is moving slowly, the pattern seems to drift relative to the surface. Explain the phenomenon and investigate how the drift depends on relevant parameters. | + | * **Shine a laser beam onto a dark surface. A granular pattern can be seen inside the spot. When the pattern is observed by a camera or the eye, that is moving slowly, the pattern seems to drift relative to the surface. Explain the phenomenon and investigate how the drift depends on relevant parameters.** |
- | 并不准确的翻译: | + | * 并不准确的翻译: |
- | 将激光照射到暗的表面,光斑中可见颗粒状图案。如果观察用的相机或者观察者的眼睛慢慢移动,图案看起来有相对表面的位移。解释这个现象,并且探究这种位移的相关参量。 | + | * 将激光照射到暗的表面,光斑中可见颗粒状图案。如果观察用的相机或者观察者的眼睛慢慢移动,图案看起来有相对表面的位移。解释这个现象,并且探究这种位移的相关参量。 |
- | --- //[[19307110256@fudan.edu.cn|娄泽坤]] 2019/10/12 15:58// | + | --- //[[19307110256@fudan.edu.cn|lzk]] 2019/10/12 15:58// |
===== 参与学生 ===== | ===== 参与学生 ===== | ||
* 娄泽坤 | * 娄泽坤 | ||
- | * 段沣洋 | ||
* 辛在舟 | * 辛在舟 | ||
* 刘佳豪 | * 刘佳豪 | ||
行 34: | 行 33: | ||
==== 2.产生相对位移的定量描述 ==== | ==== 2.产生相对位移的定量描述 ==== | ||
- | * 应先明确,相机对焦位置和散射表面的关系可能会影响图案相对表面的移动方向,**猜测**远场图案比进场稳定。(未写完,叫我去想想……) | ||
+ | ==== 3.搭建一个足够稳定的装置使照相机或者光屏与激光笔移动 ==== | ||
+ | |||
+ | |||
+ | |||
+ | ===== 相关知识 ===== | ||
+ | * 散斑的形成 | ||
+ | * 有关设计和组装实验装置方面的技能 | ||
+ | |||
+ | ===== 相关文章 ===== | ||
+ | * 姚军娜, 杨雪, 黄志成, 王琳, 叶柳 (2017). "动态激光散斑测量透镜焦距." 大学物理实验(第1期): 10-12, 83 | ||
+ | * 叶柳(1996). "动态三班测量凸透镜焦距." 物理实验(第3期) | ||
===== 交流 ===== | ===== 交流 ===== | ||
* http://stemfellowship.org/iypt-2020-references-2/iypt-2020-reference-problem-11-drifting-speckles | * http://stemfellowship.org/iypt-2020-references-2/iypt-2020-reference-problem-11-drifting-speckles | ||
- | * | ||
* https://www.bb.ustc.edu.cn/jpkc/guojia/dxwlsy/kj/part2/grade3/LaserSpeckle.html | * https://www.bb.ustc.edu.cn/jpkc/guojia/dxwlsy/kj/part2/grade3/LaserSpeckle.html | ||
- | * | ||
* 光学中的散斑现象 Speckle phenomena in optics by Goodman, Joseph W. | * 光学中的散斑现象 Speckle phenomena in optics by Goodman, Joseph W. | ||
+ | |||
+ | ===== 讨论区 ===== | ||
+ | * 怎么搭建一个足够精确的装置使相机或者光屏与激光器移动 | ||
+ | * 使用tracker追踪散斑图案,如何更加准确? | ||