OPTI 201R L25-1

OPTI 201R L25-1 - 243 Chapter 8 Mirrors Reflection:...

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OPTI 201R Fall 2009 243 Chapter 8— Mirrors Reflection : sin sin i n I n I r ! " (2.14) …therefore ri II ! " …and n ! -n after a reflection "Why use mirrors? " " To fold the optical system to get extra distance via virtual space. " To correct (change) handedness. " To produce multiple virtual images (kaleidoscopes!!!)
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OPTI 201R Fall 2009 244 Image Orientation : Figure 8.1 Point source reflection in the plane of incidence. Figure 8.2 Projection of a line object through a plane mirror. " Plane of incidence # the plane containing the ray and the normal to the surface. " Raytracing using the Law of Reflection. " A' is a virtual image of A, and B' is a virtual image of B. ( the rays only appear to diverge from the image points.) " The image points are located an equal distance behind the mirror that their respective object points are in front of the mirror. " The line connecting object/image points is # to the mirror.
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OPTI 201R Fall 2009 245 Figure 8.3 Observing a line object directly and via a plane mirror. Figure 8.4 Prospective reflection from plane mirror. " “It’s all in your perspective…. .”
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OPTI 201R Fall 2009 246 Construction of Mirrors: "Scientific-grade" mirrors: " Reflective coating is aluminum (done in a vacuum chamber). (gold in the IR, fresh silver in the UV). " The coating is (usually) on the front surface.
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OPTI 201R L25-1 - 243 Chapter 8 Mirrors Reflection:...

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