Fraunhofer diffraction of single slit
Fraunhofer diffraction of multiple slits
Features
Stable performance with easy operation
LED display with accurate reading
Including He-Ne laser and photodetector with amplifier
Complete system
Introduction
This system can be used to quantitatively investigate diffraction effects. To capture and analyze diffraction patterns, a photocell is used to transform diffraction pattern into current which is displayed by a digital meter. The intensity distribution of diffraction can be plotted with the numerical data recorded. This experiment can help students understand the wave nature of light and improve their experimental skills. The instruction manual contains comprehensive materials including experimental configurations, principles and step-by-step instructions. Please click Experiment Theory and Contents to find more information about this apparatus.
Using this system, the following experimental examples can be conducted:
Fraunhofer Diffraction (Far-field)
1. Fraunhofer diffraction through a single-slit
2. Fraunhofer diffraction through a multi-slit plate
3. Fraunhofer diffraction through a single circular aperture
4. Fraunhofer diffraction through a transmission grating
Fresnel Diffraction (Near-field)
1. Fresnel diffraction through a single-slit
2. Fresnel diffraction through a multi-slit plate
3. Fresnel diffraction through a circular aperture
4. Fresnel diffraction past a straight edge
Part List
| Description | Specs/Part# | Qty |
| Optical Rail | 1 m, Black anodized aluminum | 1 |
| Carrier | General | 2 |
| Carrier | x-translation | 2 |
| Carrier | x-z translations | 1 |
| Transverse Measurement Stage | Travel: 80 mm, Accuracy: 0.01 mm | 1 |
| He-Ne Laser | >2.0 mW (LLL-2) | 1 |
| Lens Holder | SZ-08 | 2 |
| Plate Holder | SZ-12 | 1 |
| White Screen | SZ-13 | 1 |
| Adjustable Slit | Continuously adjustable from 0-2 mm (SZ-40) | 1 |
| Laser Holder | SZ-42 | 1 |
| Lens | f '= 6.2, 150 mm | 1 each |
| Multi-slit Chrome Plate | 2,3,4,5 slits (slit width: 0.03 mm; adjacent slit gap: 0.06 mm) | 1 |
| Multi-hole Chrome Plate | 5 circular holes: 0.1/0.2/0.3/0.4//0.5 mm (diameter) | 1 |
| 5 square holes: 0.1/0.2/0.3/0.4/0.5 mm (side length) | ||
| Grating | 20 lines/mm (with mount) | 1 |
| Detector and Amplifier | 20 μW-200 mW (LLM-1) | 1 |
Fraunhofer diffraction of single slit
Fraunhofer diffraction of multiple slits
