| qshpang |
2007-05-05 14:30 |
Lens and images
Lens and images rY^uOrR>j*
*,lDo 9
Introduction: Along with mirrors, lens complete the set of simple optical elements. Lens T&pCLvk z
have been used for hundreds of years. Galileo constructed the first telescope from a pair of lens GyQF R ?
in 1609 and used it to discover, among other things, several of Jupiter’s moons. A lens forms QH(&Cu ,
images by bending the incoming light as it passes. Image formation can be understood by L$OZ]
treating the incoming light as rays and using a simple geometric arguments. Like much of basic Y"8@\ 73(R
physics, this approach isn’t completely correct but is a good approximation. Because of the zu
@|"f^`
geometric nature of the approximation, one can analyze a lens with geometry. This sort of q5e(~@(z<`
approach is called ray tracing. In today’s lab, we will form images with lens and analyze the Fh)xm* u(
system with ray tracings and with equations.
|
|