"time flies"
But keep them away from the food.
And it must have been at least 35 years ago I was playing about with real microspectroscopy - albeit in the visible spectrum.
Actually at the same time we were also doing something approaching microspectroscopy with IR. Take the standard Perkin Elmer job, add a couple of lenses (made from KCl IIRC) and a special specimen mount. The latter was made from a couple of industrial diamonds to squeeze the specimens, small fibre, flat. The diamonds were cut as truncated pyramids, rather like a Tudor gem cut and under pressure if they were misaligned there was a risk of bits of diamond spalling off (diamond might be hard to scratch but can fracture).
My mate had to ring up the presumably very small, specialist US supplier for some reason and the guy he had to speak to wasn't there - he only worked there part time. "I suppose he works for de Beers the rest of the time." Oh dear. Americans don't do Irish humour.