| qshpang |
2007-05-05 14:30 |
Lens and images
Lens and images v^|U?
n 8cA8<
Introduction: Along with mirrors, lens complete the set of simple optical elements. Lens $a(-r-_Fi]
have been used for hundreds of years. Galileo constructed the first telescope from a pair of lens mU'<:gL+
in 1609 and used it to discover, among other things, several of Jupiter’s moons. A lens forms h
><Sp*z_V
images by bending the incoming light as it passes. Image formation can be understood by ;KeU f(tH
treating the incoming light as rays and using a simple geometric arguments. Like much of basic u9lZHh#V-
physics, this approach isn’t completely correct but is a good approximation. Because of the sD|l}f
geometric nature of the approximation, one can analyze a lens with geometry. This sort of _)A|JC!jId
approach is called ray tracing. In today’s lab, we will form images with lens and analyze the ~9X^3 .nI
system with ray tracings and with equations.
|
|