Brewster’s angle measurement
Verification of Malus’s law
Features
Ideal for demo
Observing polarization by reflection
Measuring Brewster's angle
Verifying Malus's law
Introduction
Compared with other important properties of light such as interference and diffraction, polarization is more abstract and relatively hard to understand. Without special equipment, human eyes or even optical detectors cannot recognize polarization phenomena. LEOI-40 is developed to help students understand the concept and mechanism of polarization. It allows students to measure different types of polarization and the working parameters of optical elements involved. The system is designed for manual operation in order to enhance students’ hands-on ability and consolidate their knowledge and skills. Experiment results can be graphed to schematically illustrate the theory of polarization. Students should acquire a fundamental understanding of polarization and the mechanism involved in polarization elements.
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:
1. Brewster's angle measurement of a black glass
2. Verification of Malus's law
3. Function study of a half-wave plate
4. Function study of a quarter-wave plate: circularly and elliptically polarized light
Part List
| Description | Specs/Part No. | Qty |
| Optical Rail | Duralumin, 74 cm | 1 |
| Carrier | General | 3 |
| Carrier | X-adjustable | 1 |
| Carrier | X-Z adjustable | 1 |
| Alignment Screen | 1 | |
| Lens Holder | SZ-08 | 2 |
| Plate Holder | SZ-12 | 1 |
| Adaptor Piece | SZ-09 | 1 |
| Optical Goniometer | SZ-47 | 1 |
| Polarizer Holder | SZ-51 | 3 |
| Polarizer | Φ 20 mm with holder | 2 |
| λ/2 Wave Plate | Φ 10 mm, λ = 632.8 nm | 1 |
| λ/4 Wave Plate | Φ 10 mm, λ = 632.8 nm | 1 |
| Lens | f '= 150 mm | 1 |
| Black Glass Sheet | 1 | |
| Beam Expander | f '= 4.5 mm | 1 |
| He-Ne Laser | >2.0 mW @632.8 nm | 1 |
| Laser Holder | SZ-42 | 1 |
| Optical Current Amplifier | LLM-1 | 1 |
Brewster’s angle measurement
Verification of Malus’s law
