Welcome to Laser Pointer Forums - discuss green laser pointers, blue laser pointers, and all types of lasers

LPF Donation via Stripe | LPF Donation - Other Methods

Links below open in new window

ArcticMyst Security by Avery

405nm etch-a-sketch

Joined
Aug 27, 2010
Messages
301
Points
18
I've discovered something interesting using a pair of photochromic lens glasses (often branded as transition or photolite glasses), when shining a 405nm beam at them they darken in response to the UV light and you can draw on them as if the beam is a pen. I tried this only with a very low power pointer as a higher power may damage the embedded material but other than that it seems to completely recover back to it's original state after about 10 minutes. I'll see if I can put up some pictures later to demonstrate this if you don't have a pair around.

Note: Do not even think of using these as safety glasses. The response time is not instant and they don't nearly block all of the light even with a 10mW pointer.
 





Joined
Aug 27, 2010
Messages
301
Points
18
Bummer some one beat me to it :p I wonder though if this material would be commercially available or by custom order in a larger sheet. Might be something worth looking into, I'll do some searching tonight.
 




Top