Overhead+Projector

toc =Overhead Projector= The overhead projector is a device that is used to magnify images. It has Improved =Lenses=

Fresnel Lens
The Fresnel lens is a specialized lens that focuses light waves to the Head of the projector.

Objective Lens
The objective lens is used to take the Image (light waves) and magnify the Image and inverts it. While directing the light waves to a mirror that flips the image upright.

== =Head= The head is used to focus the image. By moving the head up or down you are able to define how much light is being focused on the objective lens. =Overhead vs. Microscope= References Figure 5-4. Â—Overhead projector nomenclature.. (n.d.). //Drafting Reference Training Manuals//. Retrieved May 23, 2012, from http://draftingmanuals.tpub.com/14063/css/14063_234.htm Focal Length and Lens Strength. (n.d.). //HyperPhysics//. Retrieved May 23, 2012, from hyperphysics.phy-astr.gsu.edu/hbase/geoopt/foclen.html#c2 HowStuffWorks "How does a Fresnel lens work?". (n.d.). //HowStuffWorks "Science"//. Retrieved May 23, 2012, from http://science.howstuffworks.com/question244.htm Molecular Expressions Microscopy Primer: Anatomy of the Microscope - Magnification. (n.d.). //Molecular Expressions: Images from the Microscope//. Retrieved May 23, 2012, from http://micro.magnet.fsu.edu/primer/anatomy/magnification.html Objective Lens (i). (n.d.). //M A T T E R - Materials Science & Engineering educational software//. Retrieved May 23, 2012, from http://www.matter.org.uk/tem/lenses/objective_lens_1.htm