Hi,
I discovered a cool effect in glass when it is exposed to a moving violet laser light. If you look at the light spot that hits the glass in a mirror or in a regular window, then try to move the laser around on the surface when it's dark, but still focus your eyes on the small violet spot that moves around. Then, when it is completely dark, you'll clearly see an amber colored light tail that follows the violet dot as it moves around!
I have already discovered that some fully transparent glass materials is glowing when it's exposed to violet light, when I once used a special glass collimator lens in this laser, as I did see that the glass itself glowed amber-orange (Also redish and greenish, depending on glass material) when I turned on the laser, but I did not know that the glass material did keep alive that light for so long after the violet light was turned off or moved to another location on the glass surface.
I tried to take a video and a picture of my new discovery, but the 405nm light, even that it doesnt seems so bright with my eyes, it was far too bright for the digital camera to see the light tail. So sorry for that - you just have to try it live. If you have an orange filter, you can use that to block the violet light so only the flourecent light tail will remain.
Vidar
I discovered a cool effect in glass when it is exposed to a moving violet laser light. If you look at the light spot that hits the glass in a mirror or in a regular window, then try to move the laser around on the surface when it's dark, but still focus your eyes on the small violet spot that moves around. Then, when it is completely dark, you'll clearly see an amber colored light tail that follows the violet dot as it moves around!
I have already discovered that some fully transparent glass materials is glowing when it's exposed to violet light, when I once used a special glass collimator lens in this laser, as I did see that the glass itself glowed amber-orange (Also redish and greenish, depending on glass material) when I turned on the laser, but I did not know that the glass material did keep alive that light for so long after the violet light was turned off or moved to another location on the glass surface.
I tried to take a video and a picture of my new discovery, but the 405nm light, even that it doesnt seems so bright with my eyes, it was far too bright for the digital camera to see the light tail. So sorry for that - you just have to try it live. If you have an orange filter, you can use that to block the violet light so only the flourecent light tail will remain.
Vidar