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1、CGIE Girls Get Set 2002,Fiber Optics & Light Guides,Presentation by: CGIE Cambridge Girls In Engineering July 1st August 2nd, 2002,CGIE Girls Get Set 2002,Mia,School: Cambridgeport School Age: 13 yrs old Hobbies: Computer Games, Sports,CGIE Girls Get Set 2002,Lydia,School: Martin Luther King School
2、Age: 13 yrs old Hobbies: Drawing & Painting,CGIE Girls Get Set 2002,Annie,School: King Open School Age: 14 yrs old Hobbies: Dancing, Swimming, and Basketball,CGIE Girls Get Set 2002,Ashlee,School: King Open School Age: 14 yrs old Hobbies: Swimming, Singing, volleyball,CGIE Girls Get Set 2002,Laurie,
3、School: Cambridgeport School Age: 12 yrs old Hobbies: Playing the piano, listening to music, shopping, and writing,CGIE Girls Get Set 2002,Overview of Presentation,Basic knowledge, use, and structure of fiber optics and light guides how they work, pros/cons, applications, etc. Group project deciding
4、 on ideas, prototypes, ordering, building, etc. Final Exhibit,CGIE Girls Get Set 2002,What Are Fiber Optics?,Long, thin strands Glass/Plastic Diameter of a human hair Come in bundles Able to transmit signals or images over long distances,CGIE Girls Get Set 2002,What are Light Guides?,Long rods that
5、come in different shapes and sizes Glass/ plastics able to transmit light Some are flexible Work like fiber optics,CGIE Girls Get Set 2002,Differences Between Fiber Optics and Light Guides,Light Guide- long, variety of different diameters, do not concentrate light as well as fiber optics Fiber Optic
6、s- small, thin, transmit light more efficiently, flexible,CGIE Girls Get Set 2002,Basic Structure of Fiber Optics and Light Guides,* Layer one: Jacket or Buffer Coating *Layer two: Cladding *Layer three: Core,CGIE Girls Get Set 2002,How Do They Work,The core has a higher index of refraction than the
7、 cladding The light travels through the core by constant reflection from the cladding,CGIE Girls Get Set 2002,Advantages & Disadvantages of Fiber Optics,Advantages Lightweight Non-flammable Flexible Carry signals more efficiently than traditional methods,Disadvantages Break easily Small & hard to de
8、tect Expensive,CGIE Girls Get Set 2002,Advantages & Disadvantages of Light Guides,Advantages: More durable Light travels through Less expensive Available in different sizes,Disadvantages: Scratches easily Some are breakable Light can get lost if scratched too much,CGIE Girls Get Set 2002,Application
9、s of Fiber Optics,Medical instruments Communications networks Computers and printers,CGIE Girls Get Set 2002,Where did Fiber Optics come from?,In the late 1800s scientist John Tyndall found using an illuminated tank, light could travel through a curved stream After years of experimenting, he found t
10、hat light and images were able to be carried through glass rods,CGIE Girls Get Set 2002,How We Decided on Fiber Optics and Light Guides,We were going to use lasers and mirrors to reflect light through a maze It was suggested that we do something with fiber optics We did research and found out about
11、light guides We brainstormed ideas,CGIE Girls Get Set 2002,Exhibit Ideas,Our ideas were: Spider Girl Teddy Bear Medusas Head Alphabet Spaghetti Maze,CGIE Girls Get Set 2002,Spider Girl,CGIE Girls Get Set 2002,Teddy Bear,CGIE Girls Get Set 2002,Medusas Head,CGIE Girls Get Set 2002,Spaghetti Maze,CGIE
12、 Girls Get Set 2002,Final Decision,We decided to do the spaghetti maze as our main project New title for the exhibit: “Light It Up”,CGIE Girls Get Set 2002,Prototypes,CGIE Girls Get Set 2002,What is “Light It Up”?,Various fiber optics and light guides shaped with bends and curves Users of the exhibi
13、t shine the light in one end and see where it comes out Putting colored filters in front of the light changes how it looks coming out of the other end This exhibit shows how light travels through fiber optics and light guides,CGIE Girls Get Set 2002,Discussions,CGIE Girls Get Set 2002,Experiments,Di
14、fferent lengths & diameters of light guides Different light sources flashlights vs. LEDs Bending light guides with different heat sources stove vs. blowtorch Filters / colors,CGIE Girls Get Set 2002,Problems We Came Across,What kind of lights are we going to use? How powerful will they be? How will
15、the lights be set up? What diameter of the light guides are we using? What are the dimensions of the exhibit? What is the cost of the materials? Are the light guides strong enough to carry the light?,CGIE Girls Get Set 2002,More Issues,Light cannot travel through a 30 foot long light guide Maximum l
16、ength of each light guide is 6 feet Different frustrations with team dynamics,CGIE Girls Get Set 2002,Ordering Materials,Different types of light guides & fiber optics Lights (LED & reflectors) Color Filters Wire for prototype Light switches,CGIE Girls Get Set 2002,Budget,Total Estimated Cost = $1703.02,CGIE Girls Get Set 2002,Lets Do It!,CGIE Girls Get Set 2002,Final Exhibit: Light It Up,CGIE Girls Get Set 2002,SPECIAL THANKS to,CGIE Girls Get Set 2002,Questions?,?,?,
