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Mirror box principles
I wanted to fit the cell within a box made of 100mmx25mm rectangular section - so only 100mm thick. This would be easy and safe to handle with one hand with the weight close to the body.
The cell had to allow "over the top" viewing - so no lateral movement either way. I didn't want to confine the mirror between opposing edge supports.
Glueing offered the potential of no slack, backlash or movement at all, but with still the ability to cope with thermal expansion.
I wanted the collimation screws to be accessible from the top not the bottom.
Compared to mechanical fastenings, glueing was very easy. Just cut out the Plop trianges and glue it all together.
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