該儀器（型號(hào)：HO-ED-D-02）適用于物理研究生和研究生課程。在這里，使用安裝在平移臺(tái)上的檢測(cè)器仔細(xì)研究了衍射圖樣。該設(shè)備由1.2米長(zhǎng)的光軌以及托架，光學(xué)元件和光機(jī)械組成。在導(dǎo)軌的一端，安裝了帶有探測(cè)器的X-平移臺(tái)，在另一端，將激光保持在運(yùn)動(dòng)學(xué)支架上。附在導(dǎo)軌上的線性刻度尺使長(zhǎng)度測(cè)量變得容易和方便。激光頭和檢測(cè)器平臺(tái)都安裝在帶鎖的軌道車上，而后者又可以方便地安裝在軌道上的任何位置。
The diffraction equation (condition for minima) is,
Sin θm = m λ / d
Where d is the slit width, m is the order, λ is the wavelength of laser used and θm is the angle subtended within the central maximum and mth order minimum.
From this we can find out the slit width d as
d = m λ / Sin θm
The diffraction equation (condition for maxima) is,
Radius of the Airy’s disc,
x = ( 1.22 l λ ) / a
where,
a = Diameter of the aperture (pinhole),
l = Distance between the pinhole and the Screen,
λ = Wavelength of light,
x = Radius of the Airy’s disc
Thus we can find the diameter of the aperture (pinhole) using the equation
a = ( 1.22 l λ ) / x
特征 高測(cè)量精度，清晰清晰的衍射圖樣 衍射元件固定在金屬外殼上，易于安裝 順暢開(kāi)啟，光源使用壽命長(zhǎng) 可靠且負(fù)擔(dān)得起