23 Mar
2009
23 Mar
'09
1:33 p.m.
The bandwidth of modulating the intensity might well
be high, but the
deflection bandwidth is going to be pretty low. You cna deflect an
electron mean at freqeuncies of many megahertz, which is going to be
'interesting' to acheive using mechanically moved mirrors.
Yes, but mechanically moved mirrors aren't the only option for beam
deflection. I seem to recall reading of a crystal whose index of
refraction could be changed electrically. A wedge of such a substance
could serve as a beam-deflecting element; I don't know how fast it
responds, but I'm fairly sure it's substantially faster than
mechanically moving a mirror.
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