SUMMARY

The phenomena of interference and diffraction of light are important elements of fluctuation optics. The light interference phenomenon used to be the cornerstone of laying down the light fluctuation, which has important significance in fluctuation optics. The light diffraction phenomenon, on the other hand, is a phenomenon that cannot be explained by geometrical optics in the propagation of light beams, and is one of the main signs of light fluctuation. The study of light interference and diffraction not only helps to further deepen the understanding of the volatility of light, but also helps to further study the modern optical experimental techniques, such as spectral analysis, crystal structure analysis, holography, optical information processing. This experiment is carried out simultaneously with single slit, multiple slits, circular holes, square holes, etc., which can show the characteristics of diffraction and interference distinctly, and the light intensity distribution detector used to measure the relative distribution of light intensity enables to provide the real time relationship curve between light intensity and position. Meanwhile with the surface-array camera, the digitization of the experiment is easily realized to study on the two-dimensional light intensity distribution of diffraction images.

EXPERIMENTAL CONTENTS

a) Basics

To study the interference pattern formed by laser passing through the double slit, measure the distribution of the interference light intensity formed by the double slit, and to demonstrate the consistency of the maximum position of the interference fringes and the theoretical predictions.  

To study the diffraction pattern formed by laser passing through the single slit, measure the diffraction intensity distribution formed by the single slit, and to demonstrate the consistency of the minimal position of the diffraction fringe and the theoretical prediction.

b) Enhanced

To study the interference pattern formed by laser passing through the multiple slits, and to understand the principles of multiple-slit diffraction and multiple-beam interference.

c) Advanced

To observe the diffraction of laser passing through the circular and square apertures, and to study the two-dimensional light intensity distribution of the diffraction image by a surface array camera.

d) Highest order

To study the diffraction pattern formed by laser passing through the multiple holes and the distribution of two-dimensional light intensity of the diffracted images by a COMS camera.

FEATURE

• Real-time measurement of light intensity position distribution curve with the fastest response time up to milliseconds.

• Accurate measurement of diffraction fringes of more than 8 levels with a positional measurement accuracy of up to 0.01mm.

• Study on the two-dimensional light intensity distribution of diffraction images by the surface array camera.

• Integrated slit group designation, convenient in changing and conducting experiments.

EXPERIMENTAL DATA

Overall diffraction diagram(Slit width 0.24 mm)

Partial enlargement of diffraction diagram(Slit width 0.24 mm)

Overall diagram of double-slit interference(Slit width 0.1mm, slit spacing 0.5mm)

Partial enlargement of double-slit interference diagram (Slit width 0.1mm, slit spacing 0.5mm)

SELECTION GUIDELINES