THORLABS EDU-3D1 User Manual
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THORLABS EDU-3D1 User Manual

THORLABS EDU-3D1 User Manual

Polarization and 3d cinema technology kit
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EDU-3D1
EDU-3D1/M
Polarization and
3D Cinema Technology Kit
User Guide

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  • Page 1 EDU-3D1 EDU-3D1/M Polarization and 3D Cinema Technology Kit User Guide...

  • Page 2: Table Of Contents

    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. ...
  • Page 3 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    ...

  • Page 4: Chapter 1 Warning Symbol Definitions

    Polarization and 3D Cinema Technology Kit Chapter 1: Warning Symbol Definitions 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...

  • Page 5: Chapter 2 Safety

    Polarization and 3D Cinema Technology Kit Chapter 2: Safety 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.

  • Page 6: Chapter 3 Product Description

    Polarization and 3D Cinema Technology Kit Chapter 3: Product Description 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.

  • Page 7: Chapter 4 Setup

    Polarization and 3D Cinema Technology Kit Chapter 4: Setup 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.
  • Page 8 Polarization and 3D Cinema Technology Kit Chapter 4: Setup 2 x HSLT2 2 x Halogen Bulbs, 2 x SM1CP2 16 W, 230 lumen Passive-Heat-Sink Externally SM1-Threaded SM1 Lens Tube with End Cap External SM2 Threads 1 x LPVISE2X2 2 x SM1RR Linear Polarizer SM1-Threaded 2 x RSP1D(/M)
  • Page 9 Polarization and 3D Cinema Technology Kit Chapter 4: Setup 1 x FP02 2 x AM4T(/M) Wide Plate Holder 4° Angle Block 1 x Cinema Screen (Mounted on TPS5) 1 x CPS532-C2 532 nm Laser Diode 1 x LDS5(-EC) 1 x VC1(/M) Module, Class 2 5 VDC Laser Power Supply Small V-Clamp...
  • Page 10 Polarization and 3D Cinema Technology Kit Chapter 4: Setup 1 x SM05D5 1 x SPW606 1 x FT502 Lever-Actuated Iris 5 kΩ Fixed Stub-Style Diaphragm SM1 Spanner Wrench, BNC Terminator (Ø0.7 mm - Ø5 mm) Length = 1" 4 x Linear Polarizer 5 x Red-Cyan Glasses 3D Glasses 4 x RealD™...
  • Page 11 Polarization and 3D Cinema Technology Kit Chapter 4: Setup Imperial Kit Screws, Ball Driver, and Hex Keys Type Quantity Type Quantity 1/4"-20 x 1/2" Cap Screw 1/4" Nut 1/4"-20 x 5/8" Cap Screw 1/4" Washer (W25S050) 1/4"-20 x 3/4" Cap Screw 8-32 x 1/2"...

  • Page 12: Chapter 5 Underlying Theoretical Principles

    Polarization and 3D Cinema Technology Kit Chapter 5: Underlying Theoretical Principles Chapter 5 Underlying Theoretical Principles 5.1. Polarization Electromagnetic waves are transverse waves, which means that they oscillate perpendicular to their direction of propagation. The direction of this oscillation, more specifically the direction of the electric field, is referred to as direction of polarization.

  • Page 13: Circular Polarization

    Polarization and 3D Cinema Technology Kit Chapter 5: Underlying Theoretical Principles 5.1.2. Circular Polarization In the case of circularly polarized light, are the same size, but the components of the field are shifted with respect to each other by a quarter wavelength, or a phase of /2.

  • Page 14: Λ/4 Plates

    Polarization and 3D Cinema Technology Kit Chapter 5: Underlying Theoretical Principles How then is a linearly polarized wave transmitted when it strikes a polarizer at an angle θ? Transmission Axis =Transmission Axis Ө Figure 3 Distribution of the electric field of a linearly polarized wave on a polarizer. As shown in Figure 3, we decompose the vector of the incident field into its components parallel and perpendicular to the transmission direction of the polarizer.

  • Page 15: Behavior Of A Λ/4 Plate And Polarizer In Series

    Polarization and 3D Cinema Technology Kit Chapter 5: Underlying Theoretical Principles In a λ/4 (quarter-wave) plate (or λ/4 film as in this kit), the parameters are now chosen in such a way that the retardation of the one axis with respect to the other is exactly one- quarter wavelength (λ/4), corresponding to a phase difference of π/2.
  • Page 16 Polarization and 3D Cinema Technology Kit Chapter 5: Underlying Theoretical Principles This incident linearly polarized plane wave now strikes the λ/4 plate. To describe the transmission accurately, we divide the incident wave into two components that are parallel to the fast axis, , or parallel to the slow axis, ∥...

  • Page 17: Optical Activity

    Polarization and 3D Cinema Technology Kit Chapter 5: Underlying Theoretical Principles The intensity at the detector is calculated as the absolute value of the square of the electric field and thus (12) If the second polarizer is placed with the transmission axis perpendicular to the first, rotating the wave plate through 180°...
  • Page 18 Polarization and 3D Cinema Technology Kit Chapter 5: Underlying Theoretical Principles First, we will briefly consider what happens when linearly polarized light is incident on such a material. We first assume that the light is linearly polarized in the x direction and propagates in the z direction.

  • Page 19: Stress-Induced Birefringence

    Polarization and 3D Cinema Technology Kit Chapter 5: Underlying Theoretical Principles An interesting aspect is that different sugars will affect the polarization of the transmitted light differently – commercially available sugar and sorbose rotate the polarization in different directions! 5.1.7. Stress-Induced Birefringence Birefringence is a property of media that transmit light differently depending on its polarization state and direction of propagation.

  • Page 20: Stereoscopy

    Polarization and 3D Cinema Technology Kit Chapter 5: Underlying Theoretical Principles The matrices for polarization states are, for example: Linearly polarized in y: Left-circular: √ 2 Linearly polarized at 45°: Right-circular: √ 2 √ 2 The matrices for the optical components are, for example: Polarizer with transmission λ/4 plate with fast axis in y direction...
  • Page 21 Polarization and 3D Cinema Technology Kit Chapter 5: Underlying Theoretical Principles Red Filter Projector Slide Cyan Filter Red Filter Red/Cyan Eyes 3D Glasses Cyan Filter Figure 7 Schematic diagram of the anaglyph technology. The use of color filters ensures that each eye can only perceive one picture. The images are illuminated from behind with a broadband lamp and a filter is then placed in front of each image.

  • Page 22: Stereoscopy With Linear Polarizers

    Polarization and 3D Cinema Technology Kit Chapter 5: Underlying Theoretical Principles So now one image on the screen is cyan and the other is red. By placing the appropriate filter in front of the eyes (in this case red-cyan glasses), only one image reaches each eye– the other picture is in a spectral range that is filtered out by the filter.

  • Page 23: Reald Method

    Polarization and 3D Cinema Technology Kit Chapter 5: Underlying Theoretical Principles also have built-in perpendicular polarizers. These crossed polarizers now act as analyzers: the light from one projector is polarized parallel to the transmission axis of the polarizer and is transmitted to your eye. The light from the other projector is polarized perpendicular to the transmission axis and is absorbed.
  • Page 24 Polarization and 3D Cinema Technology Kit Chapter 5: Underlying Theoretical Principles Fast Axis at α+45º α λ/4 Plates Projector Slide Polarizer α Fast Axis at α -45º α Fast Axis at α-45º Screen Polarizer λ/4 Plates Eyes α Fast Axis at α+45º 3D Glasses Figure 10 Schematic diagram of the RealD 3D technology.

  • Page 25: Other Methods

    Polarization and 3D Cinema Technology Kit Chapter 5: Underlying Theoretical Principles 5.2.5. Other Methods The creation of an impression of depth is technically possible using several other methods, some of which have been used since before the year 1900 (refer to the ‘Kaiser Panorama’ system).
  • Page 26 Polarization and 3D Cinema Technology Kit Chapter 5: Underlying Theoretical Principles Figure 11 Schematic view of the (virtual) planes. The near plane is determined by the point which is at the shortest distance to the camera or, in the final image, to the viewer. This should not be less than 20 - 25 cm (corresponds to the minimum natural visual range of people), otherwise relaxed viewing of the image is not possible.
  • Page 27 Polarization and 3D Cinema Technology Kit Chapter 5: Underlying Theoretical Principles Capture Objects Correctly Before shooting and creating a stereographic image of an object, the type of stereographic image should be defined and a suitable object selected for it. For an image with a pop-out effect, the object should not touch the edge of the image.
  • Page 28 Polarization and 3D Cinema Technology Kit Chapter 5: Underlying Theoretical Principles brightness of the images can be increased via the editor. However, this adjustment must be equal for both half-frames. Unilateral brightness changes make for bad stereoscopic integrity of the half-frames. Page 25 Rev H, December 10, 2018...

  • Page 29: Chapter 6 Setup And Adjustment

    Polarization and 3D Cinema Technology Kit Chapter 6: Setup and Adjustment Chapter 6 Setup and Adjustment 6.1. Assembly of the Components First, screw the RDF1 rubber feet onto the breadboard. Then fasten the PH3 (PH75/M) post-holders to the various base plates [BA2(/M), BA1S(/M) and BA1(/M)] using 1/4"-20 x 1/2"...
  • Page 30 Polarization and 3D Cinema Technology Kit Chapter 6: Setup and Adjustment Next, assemble the slide holder and the lens as shown in Figure 13. To do this, first remove the setscrew from a TR3 post using a hex key. Use a cap screw to attach the FH2 holder to the TR3 (TR75/M) post.
  • Page 31 Polarization and 3D Cinema Technology Kit Chapter 6: Setup and Adjustment The fast axis of the λ/4 plate is marked by a notch. The positioning of the notch relative to the scale of the holder does not matter – the orientation of the plates will be adjusted later to the 3D glasses.
  • Page 32 Polarization and 3D Cinema Technology Kit Chapter 6: Setup and Adjustment Figure 15 Holder of the polarizer film shown before assembly with the SPW606 key (left) and after assembly (right). Next, assemble the photodetector as shown in Figure 16. Connect a PH3 (PH75/M) 3″ (75 mm) long post holder to a BA2(/M) base.
  • Page 33 Polarization and 3D Cinema Technology Kit Chapter 6: Setup and Adjustment Figure 17 Stand for the saccharimetry tank, shown before assembly (left) and assembled (right). The holder for the 3D glasses is equally simple to set up: The setscrew is unscrewed using a hex key and then the FP02 holder screwed onto the post using a cap screw.

  • Page 34: Setup And Adjustment

    Polarization and 3D Cinema Technology Kit Chapter 6: Setup and Adjustment slightly. Since the angle of these blocks are rather small, the distortion of the projected image is kept at a minimum. Figure 19 Setting up the Cinema Screen 6.2. 3D Setup and Adjustment Setting up 3D projection using the RealD method is the most complex part of this experiment kit.

  • Page 35: Setup The Slides, Lamps, And Lenses

    Polarization and 3D Cinema Technology Kit Chapter 6: Setup and Adjustment Figure 20 Adjusting the polarizers to the polarizer films in the glasses.  The laser passes through the glasses, and is then linearly polarized.  Turn the linear polarizer positioned behind the glasses until no light reaches the screen anymore.
  • Page 36 It may take some time for inexperienced students to place the slides in the correct position. To make this easier, you could use Thorlabs SM2A30. When screwed into the front of the QTH10(/M), the light cone’s diameter is reduced. It is still covering the entire slide, but due to its smaller diameter, it’s easier to avoid light passing by the slide.

  • Page 37: Positioning The Polarizers And Adjusting The Films And Plates

    Polarization and 3D Cinema Technology Kit Chapter 6: Setup and Adjustment Figure 22 Sharpen the Slide Images with the Lenses.  Adjust the position of the slides so that the images overlap. 6.2.3. Positioning the Polarizers and Adjusting the Films and Plates ...
  • Page 38 Polarization and 3D Cinema Technology Kit Chapter 6: Setup and Adjustment Figure 23 Polarizers and λ/4 plates in the beam path. Page 35 Rev H, December 10, 2018...

  • Page 39: Final Adjustment

    Polarization and 3D Cinema Technology Kit Chapter 6: Setup and Adjustment 6.2.4. Final Adjustment In the previous section, each polarizer and λ/4 plate was adjusted correctly. Now the images must be superimposed so that a 3D effect is created for the viewer. The important parameter here is the offset between the images.

  • Page 40: Images

    Polarization and 3D Cinema Technology Kit Chapter 6: Setup and Adjustment 6.3. 3D Images In this kit, we provide two different sets of images: Plant (Pop-Out) Stones (Depth) The plant has a long branch of leaves that This image shows two stones and a bush faces towards the observer.

  • Page 41: Chapter 7 Exercises And Examples

    Polarization and 3D Cinema Technology Kit Chapter 7: Exercises and Examples Chapter 7 Exercises and Examples 7.1. Polarization Experiments 7.1.1. Preliminary Experiments Exercise 1: Place two polarizers in front of the laser and adjust them so that their transmission axes are perpendicular to each other. Now hold a third polarizer (film without holder) between the two crossed polarizers and rotate it.

  • Page 42: Measuring The Polarization State Of The Laser

    Polarization and 3D Cinema Technology Kit Chapter 7: Exercises and Examples Figure 25 Photodetector voltage plotted over polarizer rotation angle to show Malus’ Law. 7.1.3. Measuring the Polarization State of the Laser Exercise 3: Measure the state of polarization of the laser. Execution: Position a polarizer in front of the laser.

  • Page 43: Determining The Orientation Of The Λ/4 Plate

    Polarization and 3D Cinema Technology Kit Chapter 7: Exercises and Examples Example: An example is depicted in Figure 27 plotted on a linear scale and in a polar diagram. Figure 27 Example for the polarization state of a CPS532-C2 module. In this case, the laser polarization is quite linear.

  • Page 44: Behavior Of Λ/4 Plate For Green Light

    Polarization and 3D Cinema Technology Kit Chapter 7: Exercises and Examples Figure 28 Determining the orientation of the λ/4 plate. The laser strikes a linear polarizer, behind which the λ/4 plate is placed. After that, the second linear polarizer is aligned with the transmission axis perpendicular to that of the first polarizer.

  • Page 45: Saccharimetry

    Polarization and 3D Cinema Technology Kit Chapter 7: Exercises and Examples 7.1.6. Saccharimetry Exercise 6: If linearly polarized light passes through a sugar solution, then the amount that the polarization is rotated is proportional to the concentration of the sugar solution and to the length of the light path through it .
  • Page 46 Polarization and 3D Cinema Technology Kit Chapter 7: Exercises and Examples Water Quantity Concentration Angle of Rotation (mL) (g/cm (°) 0.30 0.20 0.15 0.12 0.10 0.08 0.05 The linear correlation can be seen clearly in the diagram. Figure 31 The graph shows the results of a test measurement. The degree of polarization rotation is a linear function of the sugar concentration.

  • Page 47: Stress-Induced Birefringence

    Polarization and 3D Cinema Technology Kit Chapter 7: Exercises and Examples proportionality from the previous exercise, the sugar concentration can be calculated. In our case 9° ⋅ 0.0699 128.8° At this concentration, we can calculate that 250*0.0699 = 17.5 g of sugar in 250 mL of the soft drink, which is a good value for a rough approximation.

  • Page 48: Method With Red-Cyan Glasses

    Polarization and 3D Cinema Technology Kit Chapter 7: Exercises and Examples Now take the second polarizer and hold it in front of the eye in such a way that the polarizers are perpendicular to each other. If you move the plastic box between the polarizers, you will see that light with different wavelengths undergoes a change in polarization that varies depending on the section of the box and thus each location on the box will rotate a different color to the appropriate polarization state to pass through the...

  • Page 49: Projection With Linear Filters

    Polarization and 3D Cinema Technology Kit Chapter 7: Exercises and Examples  Position the lenses in such a way that (a) the images are sharp on the screen and (b) are superimposed, refer to Figure 34. You can now view the image with another red-cyan pair of glasses.

  • Page 50: Projection With The Reald Method

    Polarization and 3D Cinema Technology Kit Chapter 7: Exercises and Examples  Next, the polarizers are added to the setup, one for each beam path. To ensure that no part of the image is cut off, the polarizers should be positioned close to the focal points of the lenses.

  • Page 51: Projection

    Polarization and 3D Cinema Technology Kit Chapter 7: Exercises and Examples  Both sides therefore behave significantly differently. It is now obvious that there is a polarizer on the one side and a λ/4 film on the other side. Exercise 15: Put on the RealD glasses and stand in front of a mirror. Now close one eye. What do you observe and why? Execution: This exercise nicely shows that the light undergoes a phase shift upon reflection: If we mentally close the left eye, we see ourselves in the mirror with the right...

  • Page 52: Chapter 8 Exercise Overview

    Polarization and 3D Cinema Technology Kit Chapter 8: Exercise Overview Chapter 8 Exercise Overview Exercise 1: Place two polarizers in front of the laser and adjust them so that their transmission axes are perpendicular to each other. Now hold a third polarizer (film without holder) between the two crossed polarizers and rotate it.

  • Page 53: Chapter 9 Troubleshooting And Comments

    Polarization and 3D Cinema Technology Kit Chapter 9: Troubleshooting and Comments Chapter 9 Troubleshooting and Comments  The curves that are measured with the photodetector do not follow the theoretical curves (e.g., Malus’ Law). A photodiode responds linearly only in a certain intensity range. When the intensity is too high or the resistor value has a wrong value, the measured voltage is not proportional to the intensity of the light incident on the detector.

  • Page 54: Chapter 10 Regulatory

    10.1. Waste Treatment is Your Own Responsibility If you do not return an “end of life” unit to Thorlabs, you must hand it to a company specialized in waste recovery. Do not dispose of the unit in a litter bin or at a public waste disposal site.

  • Page 55: Chapter 11 Thorlabs Worldwide Contacts

    Polarization and 3D Cinema Technology Kit Chapter 11: Thorlabs Worldwide Contacts Chapter 11 Thorlabs Worldwide Contacts For technical support or sales inquiries, please visit us at www.thorlabs.com/contact for our most up-to-date contact information. USA, Canada, and South America UK and Ireland Thorlabs, Inc. Thorlabs Ltd.
  • Page 56 www.thorlabs.com...

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