Physics Lab Equipment

LEOI-40 Experimental System for Polarized Light - Complete Model

LEOI-40 Experimental System for Polarized Light - Complete Model


  • Ideal for demo

  • Observing polarization by reflection

  • Measuring Brewster's angle

  • Verifying Malus's law


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

DescriptionSpecs/Part No.Qty
Optical RailDuralumin, 74 cm1
CarrierX-Z adjustable1
Alignment Screen 
Lens HolderSZ-082
Plate HolderSZ-121
Adaptor PieceSZ-091
Optical GoniometerSZ-471
Polarizer HolderSZ-513
PolarizerΦ 20 mm with holder2
λ/2 Wave PlateΦ 10 mm, λ = 632.8 nm1
λ/4 Wave PlateΦ 10 mm, λ = 632.8 nm1
Lensf '= 150 mm1
Black Glass Sheet
Beam Expanderf '= 4.5 mm1
He-Ne Laser>2.0 mW @632.8 nm1
Laser HolderSZ-421
Optical Current AmplifierLLM-11

LEOI-40 Experimental System-1.jpg

Brewster’s angle measurement

LEOI-40 Experimental System-2.jpg

Verification of Malus’s law

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