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lenses

lenses. chapter 18, section 2 Jennifer Wentling. Birkenes, Robert. "Pay-view-scope looking out over the Niagara Falls.“ Flickr . Yahoo!, 24 July 2007. Web. 8 Feb. 2011. "From My Blog - Cloning A Form." LittleBeeps.com . LittleBeeps, 2009. Web. 8 Feb. 2011.

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lenses

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  1. lenses chapter 18, section 2 Jennifer Wentling Birkenes, Robert. "Pay-view-scope looking out over the Niagara Falls.“ Flickr. Yahoo!, 24 July 2007. Web. 8 Feb. 2011. "From My Blog - Cloning A Form." LittleBeeps.com. LittleBeeps, 2009. Web. 8 Feb. 2011. "Contact Lenses at Plymouth Vision Center." Plymouth Vision Center. N.p., 2010. Web. 8 Feb. 2011. Peters, Mark. "Olympus camera lenses unveiled." Lets Go Digital. N.p., 9 Nov. 2009. Web. 8 Feb. 2011. "Vintage eyeglasses spectacles from Germany by RetroEyewear on Etsy.“ StyleHive. Stylehive, Inc., 2010. Web. 8 Feb. 2011.

  2. types of lenses • convex lens • concave lens • flat lens

  3. convex lensesthicker at the center than the edges

  4. how it works • light rays are refracted when they hit the lens • converge: meet in the center “Convex Lens.” Diracdelta. Microsoft, 2011. Web 31 Jan. 2011.

  5. finding an image • lens/ mirror equation: • magnification equation: 1/f= 1/di + 1/do m= hi/ho= -di/do

  6. size matters • A larger lens lets in more light so the image is brighter • A smaller lens lets in less light therefore it creates a dimmer image Brown, Margaret. "AF-S Nikkor 400mm f/2.8G ED VR Lens." Photo Review. Media Publishing Pty Limited, Dec. 2007. Web. 8 Feb. 2011. Johnston, Mike. "TOP's Most Popular Small Camera(s)." The Online Photographer. N.p., 12 Oct. 2009. Web. 8 Feb. 2011.

  7. concave lensesthinner at the center than the edges

  8. how it works • rays diverge when refracted • the rays are refracted as if they came from the focal point “Convex & Concave Lens.” Pass My Exams. N.p., 2010. Web. 31 Jan. 2011.

  9. virtual images • the image appears on the same side of the lens as the object and it appears larger

  10. virtual images • formed by a convex lens if the object is closer than the focal point • formed by a concave lens at all times

  11. Concave and Convex Lenses • http://www.attanolearn.com/excel/MyHome.jsf?view=3156&t=1

  12. defects of lenses

  13. chromatic abberation • Causes fringes of color around the image • Use both a convex and concave les (an achromatic lens) or a convex and flat (an achromatic doublet) Mallik, U., and Lifiana Somantri. "Lenses." Many Faces of Light: As Newton Saw it, with Some Magic Tricks. N.p., n.d. Web. 4 Feb. 2011.

  14. spherical aberration • Occurs when the surface is spherical • Blurs the image • Use only the center of lenses, or multiple lenses Mallik, U., and Lifiana Somantri. "Lenses." Many Faces of Light: As Newton Saw it, with Some Magic Tricks. N.p., n.d. Web. 4 Feb. 2011.

  15. works cited • Zitzewitz, Paul W. Physics Principles and Problems. 2002 ed. New York: Glencoe, 2002. Print. • "Vintage eyeglasses spectacles from Germany by RetroEyewear on Etsy." StyleHive. Stylehive, Inc., 2010. Web. 8 Feb. 2011. • Brown, Margaret. "AF-S Nikkor 400mm f/2.8G ED VR Lens." Photo Review. Media Publishing Pty Limited, Dec. 2007. Web. 8 Feb. 2011. • Johnston, Mike. "TOP's Most Popular Small Camera(s)." The Online Photographer. N.p., 12 Oct. 2009. Web. 8 Feb. 2011. • “Convex Lens.” Diracdelta. Microsoft, 2011. Web 31 Jan. 2011. • “Convex & Concave Lens.” Pass My Exams. N.p., 2010. Web. 31 Jan. 2011. • Owens, Derek. "Concave and Convex Lenses." Attanolearn. N.p., 2009. Web. 31 Jan. 2011. • Peters, Mark. "Olympus camera lenses unveiled." Lets Go Digital. N.p., 9 Nov. 2009. Web. 8 Feb. 2011. • Mallik, U., and LifianaSomantri. "Lenses." Many Faces of Light: As Newton Saw it, with Some Magic Tricks. N.p., n.d. Web. 4 Feb. 2011. • Birkenes, Robert. "Pay-view-scope looking out over the Niagara Falls.“ Flickr. Yahoo!, 24 July 2007. Web. 8 Feb. 2011. • "From My Blog - Cloning A Form.“ LittleBeeps.com. LittleBeeps, 2009. Web. 8 Feb. 2011. • "Contact Lenses at Plymouth Vision Center." Plymouth Vision Center. N.p., 2010. Web. 8 Feb. 2011.

  16. problem solving

  17. variables • f- focal point • do- distance from lens to object • di- distance from lens to image • M- magnification • hi- height of the image • ho- height of the object

  18. formulas • lens/ mirror equation • magnification equation Henderson, Tom. "Image Formation by Lenses." The Physics Classroom. Glenbrook South High School, 2010. Web. 21 Oct. 2010

  19. works cited • Henderson, Tom. "Image Formation by Lenses." The Physics Classroom. Glenbrook South High School, 2010. Web. 21 Oct. 2010 • Zitzewitz, Paul W. Physics Principles and Problems. 2002 ed. New York: Glencoe, 2002. Print. • Mallik, U., and LifianaSomantri. "Lenses." Many Faces of Light: As Newton Saw it, with Some Magic Tricks. N.p., n.d. Web. 4 Feb. 2011.

  20. applications

  21. everyday uses

  22. the eyeball • forms the image in the retina but most of the refraction occurs at the cornea • the shape of the cornea can be changed by muscles: when the muscles are relaxed distant objects are in focus, when they are tightened closer objects are focused Emerald Coast Eye Institute. "An Illustrated Guide to the Human Eye." Emerald Coast Eye Institute. N.p., 2009. Web. 31 Jan. 2011.

  23. eyeglasses or contacts • when muscles cannot contract of relax enough to focus all objects glasses or contacts assist the retina by increasing or decreasing the focal length "Contact Lens." Chemistry Daily. N.p., 2005. Web. 31 Jan. 2011. "Glasses/ Spectecles." FreeFoto.com. N.p., 2011. Web. 31 Jan. 2011.

  24. How It’s Made: Contact Lenses • http://videos.howstuffworks.com/science-channel/14379-how-its-made-contact-lenses-video.htm

  25. microscopes • microscopes allow the human eye to see extremely small objects by using at least 2 convex lenses, the image created is both magnified and virtual “1200CM-Series." Vee Gee Scientific. Vee Gee Scientific, 2011. Web. 31 Jan. 2011. “1200ECM-Series.” Vee Gee Scientific. Vee Gee Scientific, 2011. Web. 31 Jan. 2011.

  26. telescopes • telescopes also use 2 convex lenses which creates an enlarge, virtual, and inverted image Telescope Finder. "Telescopes Store." Refracting Telescopes. N.p., 2011. Web. 31 Jan. 2011. Klotz, Irene. "World's Largest Telescope Acts like a Big Bucket." Discovery News. Discovery Communications, 23 July 2009. Web. 31 Jan. 2011.

  27. cameras • cameras contain several lenses and additional lenses can be added to focus or filter the image "Objectified." Design in Society. N.p., 2011. Web. 13 Mar. 2011

  28. "Understanding Camera Lenses." Cambridge in Colour. N.p., 2010. Web. 8 Feb. 2011.

  29. jelly lenses • lenses made for phone cameras in all different effects: sepia tones, wide angle, starburst, color filters, etc. "Jelly Lens – Mobile Phone Mini Camera Lenses." First to Flyy. Blogger, 18 Aug. 2010. Web. 8 Feb. 2011.

  30. future uses

  31. recent developement • Through the years not much about lenses has changed. The only real advancement made is the development of lenses with a number of different focal lengths. The Diagnostics and Control Research Centre is working on changing that…

  32. smart lenses • Lenses with a focal length that can be altered by electric signal. • Model • Animation • Not only could these be used for people suffering from severe vision problems but also in aroespace, communications, and military applications.

  33. works cited • Zitzewitz, Paul W. Physics Principles and Problems. 2002 ed. New York: Glencoe, 2002. Print. • "Jelly Lens – Mobile Phone Mini Camera Lenses." First to Flyy. Blogger, 18 Aug. 2010. Web. 8 Feb. 2011. • Emerald Coast Eye Institute. "An Illustrated Guide to the Human Eye." Emerald Coast Eye Institute. N.p., 2009. Web. 31 Jan. 2011. • "Contact Lens." Chemistry Daily. N.p., 2005. Web. 31 Jan. 2011. • "Glasses/ Spectecles." FreeFoto.com. N.p., 2011. Web. 31 Jan. 2011. • Klotz, Irene. "World's Largest Telescope Acts like a Big Bucket." Discovery News. Discovery Communications, 23 July 2009. Web. 31 Jan. 2011. • "VanGuard." Vee Gee Scientific. Vee Gee Scientific, 2011. Web. 31 Jan. 2011. • "How It's Made: Contact Lenses." HowStuffWorks Videos. HowStuffWorks, Inc., 2011. Web. 4 Feb. 2011. • "Smart Materials (Lenses)." E.R.I.- Engineering Research Institute. Diagnostics Control and Research Centre, 2005. Web. 4 Feb. 2011.

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