What I want to do
See bright fluorescence spectra with a fold up.
My attempt and results
While a little messy from the reflections of the laser, there is a chlorophyll peak at 670nm that is greater than 25% strength. Its the strongest fluorescence I've gotten from olive oil.
My device was simple, a small 1/4" x 1/4" chamber for a #4 gel cap.
I had to wrap the sides of the fold=up to prevent light leakage. the Nexus 5's protruding camera makes lightproofing difficult.