recommended distortion target for multiphoton?

Posted by Michael Giacomelli on
URL: http://confocal-microscopy-list.275.s1.nabble.com/recommended-distortion-target-for-multiphoton-tp7582387.html

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Could someone recommend a good multiphoton distortion target?
Preferably one that is relatively robust against damage.

Currently I am using a thorlabs wire grid target with fluorophore
behind it.  The beam is attenuated by the metal, resulting in an image
of the grid.  However, passing through the entire 1 mm slide greatly
reduces my resolution, and unless I am extremely careful, the grid is
ablated by the beam.

Thanks,
Michael