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Comment: flicker probably not an issue (Score 2, Informative) 133

by boog3r (#27719869) Attached to: New Material For Fast-Change Sunglasses, Data Storage

(not sure why i posted this on their website. i blame the booze).

Did a bit of math and figured out that at 60mph you would need a complete obstruction every 2.5 feet to induce a state change (on-off), 5 feet for a full flicker (on-off-on).

This compound cycles on-off 33.333 (repeating, of course) times/sec. Halve that for a full on-off-on cycle. The human eye can do fine with a video frame rate of 30/sec, but can detect up to 72 frames/sec.

It is possible the flicker may induce optical illusions, but not likely considering the optimal cycle time produces the highest flicker rate. Any UV transition slower will produce less flickers/sec, while a faster transition will create an increasingly static tint (chemical can't transition quickly enough).

Now sitting under a 60Hz black light, that may be kind of trippy.

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