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GeomPreReq

# GeomPreReq - Department of Electrical and Computer...

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Department of Electrical and Computer Engineering ECSE 527 Optical Engineering Thin lens equations Pre requisite material Textbook sections: Hecht 5.2 (or most other basic optics texts) Andrew Kirk 2010 Optics.1

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Overview This material is provided to ensure that everyone has the same basic knowledge of thin lenses Most people will have same basic knowledge of thin lenses. Most people will have covered this in high school, CEGEP or freshman physics courses. In order to refresh your memory, a WebCT test has been created been created. Some of these slides have been left partially blank in order for you to complete them. The correct answers will be posted in a few days. If you have not seen this material before, or have forgotten it, please don’t hesitate to approach the instructor or TA with any questions that you have ©AGK 2010 ECSE 527 Optics.2 with any questions that you have.
Learning outcomes After completing this section you should be able to: • Recognize the lens maker’s equation • Apply the thin lens formulae to calculate object position and magnification for a single lens • Make use of the sign conventions for lens curvature, object and image distances • Calculate image magnification • Recall the difference between virtual and real images ©AGK 2010 ECSE 527 Optics.3

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Outline • Thin lenses and the lens maker’s formula • Definition of focal length • Signs conventions I f ti • Image formation • Graphical ray tracing • Magnification ©AGK 2010 ECSE 527 Optics.4
Thin lenses Simple lens: Si l l t ith t f – Single element with two surfaces – At least one surface is curved – Lens thickness is small compared to focal length Other types: Thick lenses – Compound lenses H f l f th l l ti f th h t i ti f Here are some formulae for the calculation of the characteristics of thin lenses and their imaging properties. We will be deriving these in class as part of our investigation of geometrical optics. ©AGK 2010 ECSE 527 Optics.5

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