Fraunhofer Single Slit夫琅禾费单缝
The diffraction pattern at the right is taken with a helium-neon laser and a narrow single slit. The use of the laser makes it easy to meet the requirements of Fraunhofer diffraction. With a general light source, it is possible to meet the Fraunhofer requirements with the use of a pair of lenses. 右侧的衍射图样使用氦-氖激光和一个狭缝单缝取得。使用激光使得满足夫琅禾费衍射的条件变得容易。使用一般光源时,可以通过使用一对透镜来满足夫琅禾费衍射的条件。
The active formula below can be used to model the different parameters which affect diffraction through a single slit. Enter the available measurements or model parameters and then click on the parameter you wish to calculate. 以下交互式公式可用于模拟影响单缝衍射的不同参数。输入可用的测量值或模型参数,然后点击您希望计算的参数。
位移 y = (序数 m × 波长 × 距离 D ) / ( 条纹宽度 a )
This calculation is designed to allow you to enter data and then click on the quantity you wish to calculate in the active formula above. The data will not be forced to be consistent until you click on a quantity to calculate. Default values will be entered for unspecified parameters, but all values may be changed. 此计算旨在允许你输入数据,然后点击上方交互式公式中你希望计算的量。数据不会被强制保持一致,直到你点击一个量进行计算。未指定的参数将输入默认值,但所有值都可能被更改。
Note: The small angle approximation was not used in the calculations above, but it is usually sufficiently accurate for laboratory calculations. 注意:上述计算中未使用小角近似,但通常在实验室计算中足够准确。
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Index Diffraction concepts Fraunhofer diffraction 索引衍射概念 夫琅禾费衍射 | ||||||||
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