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Unformatted text preview: Lecture 10 8. Geometric Optics Newtonian form focal point focal point y o y i s o f x o f x i s i Imagery Real image : The rays intersect in a real space. You can put a piece of paper there Virtual image : The rays diverge. But if we look into the rays it appears as if they would come from a certain point: the virtual image point Real Object : Rays start at a real point in space and propagate straight until they hit the optical system Virtual object : Rays appear as if they would have come from a certain point. (important for lens combinations) Focal points n l >n m n l <n m Sign Conventions Images 8. 3. Thin lenses Sign conventions Types Lens equation Combination of two spherical interfaces We deal with it one after the other (1) (2) Sign convention Add the two Thin lens equation (Lensmaker formula) Neglect d We can now calculate the necessary quantities and determine the image MagniFcation: M T " y i y o = # s i s o Demo 8.4. Grin lenses Instead of curved interfaces also...
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 Fall '04
 DIEROLF

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