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# That's all very well,
but the crystal would react to radiation coming from all angles, so it'd light up indiscriminately all over all the time.
...Needs a lens in front, possibly.
(, Mon 19 May 2008, 20:46, archived)
# This is also true.
You'd need another collimator on the front, then.
I appreciate these glasses are becoming rather chunky and inefficient.
(, Mon 19 May 2008, 20:49, archived)
# chunkiness is not an issue
(, Mon 19 May 2008, 21:05, archived)