[ATM] A challenging 28" project

[Dominic-Luc Webb]

On Wed, 1 Aug 2007, Ric Rokosz wrote:

> on-axis to test such a fast mirror - use the laser
> pointer with/without the lens in place,shoot the laser
> beam through a microscope objective (that then
> produces a point source) and reflect it off a 50/50
> beamsplitter.On axis and a point source.Add a small
> spherical mirror in line with the laser and you have a
> LUPI interferometer.
>
> Ric

I see Ric is quite sharp thinker. For these fast mirrors, a
microscope objective is an excellent idea. A low power one,
like 4X is not appropriate here. I could guess 100 X is too
much. Something like 20-40X is probably perfect.

Dominic