Bilingual edition: English is preserved and Chinese follows each unit. Terminology uses the confirmed v20260916 glossary; automated semantic review remains traceable.
中英双语版:英文原文完整保留,中文紧随对应单元;术语采用 v20260916 确认表,自动语义审校结果可追溯。

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。
More conceptual details about single slit diffraction
关于单缝衍射的更多概念性细节

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。

Displacement y = (Order m x Wavelength x Distance D)/(slit width a)

位移 y = (序数 m × 波长 × 距离 D ) / ( 条纹宽度 a )

For a slit of width a = micrometers = x10^ m

对于宽度为 a = 微米 = x10^ m 的狭缝
中文译文中的待填/计算数值依次对应:1:a 2:ab 3:ap。实际数值以上方原输入框为准。

and light wavelength λ = nm at order m =,
且光波长 λ = nm 在 m = 的顺序中,
中文译文中的待填/计算数值依次对应:1:w 2:m。实际数值以上方原输入框为准。

on a screen at distance D = cm

在距离D = cm的屏幕上
中文译文中的待填/计算数值依次对应:1:d。实际数值以上方原输入框为准。

the displacement from the centerline for minimum intensity will be

从中心线到最小强度的位移将为

= cm.
= 厘米。
中文译文中的待填/计算数值依次对应:1:y。实际数值以上方原输入框为准。

This corresponds to a diffraction angle of θ = ° .
这对应于衍射角为 θ = °。
中文译文中的待填/计算数值依次对应:1:th。实际数值以上方原输入框为准。

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。
Fraunhofer geometry
Fraunhofer 几何
Intensity for single slit
单缝强度
Examine approximation
考察近似
Double slit interference
双缝干涉
Comparison to double slit
与双缝实验的比较
Index

Diffraction concepts

Fraunhofer diffraction
索引衍射概念 夫琅禾费衍射
 
HyperPhysics***** Light and Vision
HyperPhysics ***** 光与视觉
R Nave
Go Back
返回