| qshpang |
2007-05-05 14:30 |
Lens and images
Lens and images FTA[O.tiG
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Introduction: Along with mirrors, lens complete the set of simple optical elements. Lens 5W(S ~}
have been used for hundreds of years. Galileo constructed the first telescope from a pair of lens ~I_v {
in 1609 and used it to discover, among other things, several of Jupiter’s moons. A lens forms (I ) e- 1
images by bending the incoming light as it passes. Image formation can be understood by s-z*Lq*
treating the incoming light as rays and using a simple geometric arguments. Like much of basic 7wm9S4+|
physics, this approach isn’t completely correct but is a good approximation. Because of the RjOQSy3
geometric nature of the approximation, one can analyze a lens with geometry. This sort of 1l~(J:DT
approach is called ray tracing. In today’s lab, we will form images with lens and analyze the (ohza<X;6
system with ray tracings and with equations.
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