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Resonant scanners are somewhat similar to standard galvos, but they operate
at the mechanical resonant frequency of the mirror and shaft assembly.  This
allows them to move very quickly, but they are stuck to a single 'repetition
rate'.  The mirror typically uses a 'flexture' joint rather than bearings
which helps improve speed and reliability.  Basically it's a bendy metal
joint that flexes rather than two or more parts rubbing on each other.  This
can increase reliability.  The only real limitation to this type of mirror
is that it has a fixed speed, so you can't directly adjust pixel dwell time
with one of these.
In a typical configuration, one resonant galvo is used to sweep out lines in
one direction, while a standard galvo provides displacement in the other,
slower, direction.  I.e. resonant scanner on 'X' mirror and non-resonant on
'Y'.

Craig


On Sun, Mar 30, 2008 at 12:11 PM, [log in to unmask] <
[log in to unmask]> wrote:

> Search the CONFOCAL archive at
> http://listserv.acsu.buffalo.edu/cgi-bin/wa?S1=confocal
>
> Hello,
> I'm looking for information about the physics behind resonant scanner, I
> can't find more than the pendulm explanation! I saw there is a new resonant
> scanner integrated in a confocal from NIKON. Are they using the same than
> the LEICA SP5? I saw they can use it simultaneously with the normal scanner
> which opens some interesting applications. Did anyone carry out such
> experiment?
>
> Thanks,
> Max
>
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