THORLABS EDU-3D1 User manual

EDU-3D1
EDU-3D1/M
Polarization and
3D Cinema Technology Kit
User Guide

Polarization and 3D Cinema Technology Kit
Table of Contents
Chapter 1Warning Symbol Definitions ....................................................... 1
Chapter 2Safety ............................................................................................ 2
Chapter 3Product Description .................................................................... 3
Chapter 4Setup ............................................................................................. 4
4.1.ComponentsandPartsList.....................................................4
Chapter 5Underlying Theoretical Principles ............................................. 9
5.1.Polarization............................................................................9
5.1.1.Linear Polarization .................................................................................... 9
5.1.2.Circular Polarization ................................................................................ 10
5.1.3.Polarizer and Malus’ Law ........................................................................ 10
5.1.4.λ/4 Plates ................................................................................................ 11
5.1.5.Behavior of a λ/4 Plate and Polarizer in Series ....................................... 12
5.1.6.Optical Activity ......................................................................................... 14
5.1.7.Stress-Induced Birefringence .................................................................. 16
5.1.8.Representation with Jones Matrices ....................................................... 16
5.2.Stereoscopy..........................................................................17
5.2.1.The Basic Idea ........................................................................................ 17
5.2.2.Anaglyph Images .................................................................................... 17
5.2.3.Stereoscopy with Linear Polarizers ......................................................... 19
5.2.4.RealD Method ......................................................................................... 20
5.2.5.Other Methods ........................................................................................ 22
5.3.CreatingYourOwn3DImages..............................................22
Chapter 6Setup and Adjustment ............................................................... 26
6.1.AssemblyoftheComponents................................................26
6.2.3DSetupandAdjustment.....................................................31
6.2.1.Correct Adjustment of the Linear Filter ................................................... 31
6.2.2.Setup the Slides, Lamps, and Lenses ..................................................... 32
6.2.3.Positioning the Polarizers and Adjusting the Films and Plates ............... 34
6.2.4.Final Adjustment ..................................................................................... 36
6.3.3DImages............................................................................37
Chapter 7Exercises and Examples ........................................................... 38
7.1.PolarizationExperiments......................................................38
7.1.1.Preliminary Experiments ......................................................................... 38
7.1.2.Malus’ Law .............................................................................................. 38
7.1.3.Measuring the Polarization State of the Laser ........................................ 39
7.1.4.Determining the Orientation of the λ/4 Plate ........................................... 40

Polarization and 3D Cinema Technology Kit
7.1.5.Behavior of λ/4 Plate for Green Light ...................................................... 41
7.1.6.Saccharimetry ......................................................................................... 42
7.1.7.Stress-Induced Birefringence .................................................................. 44
7.2.3DMethodwithRed‐CyanGlasses.......................................45
7.3.3DProjectionwithLinearFilters...........................................46
7.4.3DProjectionwiththeRealDMethod...................................47
7.4.1.Preliminary Tests with the Glasses ......................................................... 47
7.4.2.3D Projection ........................................................................................... 48
Chapter 8Exercise Overview ..................................................................... 49
Chapter 9Troubleshooting and Comments ............................................. 50
Chapter 10Regulatory .................................................................................. 51
10.1.WasteTreatmentisYourOwnResponsibility........................51
10.2.EcologicalBackground..........................................................51
Chapter 11Thorlabs Worldwide Contacts .................................................. 52

Polarization and 3D Cinema Technology Kit Chapter 1: Warning Symbol Definitions
Page 1 Rev H, December 10, 2018
Chapter 1 Warning Symbol Definitions
Below is a list of warning symbols you may encounter in this manual or on your device.
Symbol Description
Direct Current
Alternating Current
Both Direct and Alternating Current
Earth Ground Terminal
Protective Conductor Terminal
Frame or Chassis Terminal
Equipotentiality
On (Supply)
Off (Supply)
In Position of a Bi-Stable Push Control
Out Position of a Bi-Stable Push Control
Caution: Risk of Electric Shock
Caution: Hot Surface
Caution: Risk of Danger
Warning: Laser Radiation

Polarization and 3D Cinema Technology Kit Chapter 2: Safety
MTN004316-D02 Page 2
Chapter 2 Safety
CAUTION
IMPORTANT: The polarizer films are covered on each side with a clear, protective
film. We strongly recommend wearing gloves when assembling the polarizers and
quarter-wave plates so that the films and windows are not touched with bare fingers.
Avoid exposure of the film polarizers to UV light, to high temperatures, and to
chemicals such as acetone.
WARNING
The laser module is a Class 2 laser, which does not require any protective eyewear.
However, to avoid injury, do not look directly into the laser beam.
CAUTION: HOT SURFACE
After the QTH10 lamp warms up, the heat sink will reach a temperature of 50 °C if the
standard bulb is used. If you are using the 16 W bulb that is provided in this kit (with
the additional heat sink properly installed), the housing temperature can reach up to
65 °C. Be careful not to touch the lamp housing during operation.
!
!

Polarization and 3D Cinema Technology Kit Chapter 3: Product Description
Page 3 Rev H, December 10, 2018
Chapter 3 Product Description
Polarization is one of the most multifaceted properties of light. Countless applications in
science and technology are based on it, some of which are simulated in this experiment
kit.
First, the basic properties of polarization are studied by observing how polarized light
behaves when it is incident on a polarizer (Malus’ Law). As a next step, the state of
polarization of a laser is measured with a polarizer and a photodetector.
The λ/4 (quarter-wave) plate represents an essential element for applications with
polarized light. When correctly oriented, it delays parts of the wave in such a way that a
circularly polarized wave is produced from incident light with linear polarization. The
polarization state of the transmitted light is one of the properties that we examine
quantitatively in this kit.
Furthermore, technical applications are demonstrated. The components included in this
package can be used to set up a measuring apparatus with which you can examine the
concentration of sugar in a liquid. The sugar rotates the polarization of incident light
proportional to the distance traversed in the medium and to the glucose concentration.
This measurement of a sugary solution demonstrates how concentration measurements
are carried out for industrial applications.
Another technological application is materials testing using birefringence – here, a work
piece (e.g. a pair of plastic glasses) is held between crossed polarizers. Birefringence is
induced in places where mechanical stress occurs, and the polarization of light passing
through the piece is rotated dependent on the wavelength. If crossed polarizers are placed
on either side of the object, potential failure points will be visible as areas appearing in
different colors.
A large part of this experiment kit is devoted to an application which has now entered our
everyday lives: 3D cinema. Two images taken from a slightly different perspective are
projected so that each image enters only one eye. When correctly superimposed, the
impression of depth perception is created. Experimentally, several different processes can
now be used to ensure that each eye only takes in one image: the red-cyan method, the
3D projection method using linear polarization, and the now well-established RealD
method with circular polarization. This kit includes the appropriate glasses are for each of
these methods. As a special feature, a piece of real cinema screen, coated with vaporized-
silver to preserve the polarization of reflected light, is provided for the experiments using
the RealD and linear polarization methods.

Polarization and 3D Cinema Technology Kit Chapter 4: Setup
MTN004316-D02 Page 4
Chapter 4 Setup
4.1. Components and Parts List
In cases where the metric and imperial kits contain parts with different item numbers,
metric part numbers and measurements are indicated by parentheses unless otherwise
noted.
1 x MB1224 (MB3060/M)
Aluminum Breadboard,
12" x 24" (30 cm x 60 cm)
1 x RDF1
4 Rubber Breadboard Feet
8 x BA2(/M)
Mounting Base,
2" x 3" x 3/8"
(50 mm x 75 mm x 10 mm)
6 x BA1S(/M)
Mounting Base,
1" x 2.3" x 3/8"
(25 mm x 58 mm x 10 mm)
1 x BA1(/M)
Mounting Base,
1" x 3" x 3/8"
(25 mm x 75 mm x 10 mm)
14 x TR3 (TR75/M)
Ø1/2" (Ø12.7 mm)
Mounting Post,
3" (75 mm) Long
12 x PH3 (PH75/M)
Ø1/2" (Ø12.7 mm) Post
Holder, 3" (75 mm) Long
2 x UPH3 (UPH75/M)
Ø1/2" (Ø12.7 mm) Post
Holder, 3" (75 mm) Long
2 x QTH10(/M)
Quartz Tungsten-Halogen
Lamp

Polarization and 3D Cinema Technology Kit Chapter 4: Setup
Page 5 Rev H, December 10, 2018
2 x Halogen Bulbs,
16 W, 230 lumen
2 x HSLT2
Passive-Heat-Sink
SM1 Lens Tube with
External SM2 Threads
2 x SM1CP2
Externally SM1-Threaded
End Cap
1 x LPVISE2X2
Linear Polarizer
(Laser Cut into 3
Ø1" Circles)
2 x RSP1D(/M)
Ø1" Rotating Polarizer
Mounts
2 x SM1RR
SM1-Threaded
Retaining Ring
2 x LM1-A
Nested Ø1" Inner
Lens Carriage
2 x LM1-B(/M)
Nested Ø1" Lens Mount
Outer Ring
2 x Ø1" Quarter-Wave
Plate
(foil with N-BK7 windows)
2 x LMR2(/M)
Lens Mount for Ø2" Optics
2 x LB1630
N-BK7 Bi-Convex Lens, Ø2",
f = 100.0 mm, Uncoated
2 x FH2
Filter Holder for
2" Square Filters

Polarization and 3D Cinema Technology Kit Chapter 4: Setup
MTN004316-D02 Page 6
1 x Cinema Screen
(Mounted on TPS5)
2 x AM4T(/M)
4° Angle Block
1 x FP02
Wide Plate Holder
1 x CPS532-C2
532 nm Laser Diode
Module, Class 2
1 x LDS5(-EC)
5 VDC Laser Power Supply
1 x VC1(/M)
Small V-Clamp
1 x SM05PD1A
Silicon Photodiode,
350 - 1100 nm,
Cathode Grounded
1 x SM05M10
1″ Long SM05 Lens Tube
1 x SM05RC(/M)
Ø1/2″ Slim Slip Ring for
SM05 Lens Tubes,
8-32 (M4) Tapped Hole
1 x CA2812
12″ Long SMA Coaxial
Cable, SMA Male
to BNC Male
1 x T1452
BNC Female to Binding Post
1 x T3285
BNC Adapter – T Adapter
(F-M-F)

Polarization and 3D Cinema Technology Kit Chapter 4: Setup
Page 7 Rev H, December 10, 2018
1 x FT502
5 kΩ Fixed Stub-Style
BNC Terminator
1 x SM05D5
Lever-Actuated Iris
Diaphragm
(Ø0.7 mm - Ø5 mm)
1 x SPW606
SM1 Spanner Wrench,
Length = 1"
5 x Red-Cyan Glasses
4 x Linear Polarizer
3D Glasses
4 x RealD™ Glasses
2 x Pairs of Slides
1 x Glass Basin
1 x LPVISE2X2
2" x 2" Linear Polarizer
Sheet