Re: BeamProfiler

In article <1120035957.996202.174280@xxxxxxxxxxxxxxxxxxxxxxxxxxxx>,
"boulder-matt" <matthias.kohler@xxxxxx> wrote:

> I have to measure a blue laserbeam with a spotdiameter <1um. Can
> anybody help me how i can do that. thank's

Knife edge method with a razor blade on a rotating arm, a magnetic
driver ("speaker cone"), or a long-throw piezo driver can be cheap and
simple -- but at that small a spot size some diffraction complexities
may creep in.

If you want to measure the beam profile with some accuracy, not just get
a less precise idea of spot size and spot shape, then measuring a
magnified image of the spot is better -- except then you have to worry
about the quality and calibration of the magnifying optics.
.