Alignment of a beam expander

I have a couple of lenses (achromats corrected for spherical and coma
and AR coated
for my wavelength of NIR diode laser, main point is that my laser is
invisible but CW).
I want to combine them to expand my laser beam. All the parameters are
calculated to
be fine for what I want.
Now then, what I need to figure out is how to align the lenses to be on
axis with each
other and minimize centration errors between lenses (meaning I want the
second lens
to NOT be tilted with respect to the first one). This is a galilean
design so one is
a planoconvex, the other is a planoconcave lens (negative and positive
achromats).
Part of the problem is that I have no visible laser available to me and
my NIR laser
can only be seen with a laser detection card which fades quickly when
exposed to
the laser. My goal for centration alignment is about 3 arcmin.
Thanks in advance.

.

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