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Optics for Toy ManufacturerOptics for Toy Manufacturer
Derek Louie
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Optical ToysOptical Toys
• Imaging Systems• Projector, video player, binoculars,
camera, magnifier, microscopes, illusion, …• Illumination Systems
• LCD backlight, headlamp, flashlight, watch, …
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Optical ComponentsOptical Components
• Light Source• LED• Light Bulb
• Secondary Optics• Reflector• Optical Lens• Fresnel Lens• Collimator Lens
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CAE Optical DesignCAE Optical Design
• Advantages• Provides virtual prototyping, simulation
and optimization• Improve productivity, make your
products faster to market• Large reduction in development time
• CAE Design Software• Imaging – ZEMAX, CODE V,
CyberRay, …• Illumination – LightTools, ASAP,
Opticalc, OSLO, …
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Design ProcessDesign Process
1. Problem Definition
2. Pre-design
3. Initial Analysis4. Optimization
5. Final Analysis
• How good is the system?• Define the optical performance• Tradeoffs between requirements
• Decide no. of elements• Define the overall size• Choosing suitable optics
• Preliminary analysis• Selecting variables for optimization
• Alter the variables• Minimize the error functions
• Analysis of simulation results• Checking the specifications
6. Fabrication & Testing
• Fabrication of prototype• Performance inspection
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Case Study 1 Case Study 1 -- ProjectionProjection
• A low-cost projection system using plastic lenses
• Optical system consists of several aspherical lenses
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Case Study 2 Case Study 2 –– Mirage MirrorMirage Mirror
• Two parabolic mirrors with identical shapes
• The focal point of one lies just at the vertex of the other when they are placed on top of one another
Object
Image
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Case Study 3 Case Study 3 -- MagnifierMagnifier
• Use of Fresnel lens in order to reduce thickness
• Design with minimized image distortion
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Case Study 4 Case Study 4 –– HeadlampHeadlamp
Diode Encapsule
Anode
Cathode
Source Modeling
Simulation Results
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Case Study 5 Case Study 5 –– LCD BacklightLCD Backlight
• Aim at obtaining higher uniformity and luminous output
• Use of LEDs as light sources
• Lightguide with micro-lenses helps in light propagation