UV filter that turns visible the invisible... WTH??

[laserdelic]

I would like to know how this works, the technical/wikipedia name of it, and of course, a cheaper way to get that if possible... resuming, any info will be appreciated :beer:

UV Laser Viewing Card, AixiZ

 

[Cyparagon]

It's just fluorescence. Mark a piece of paper with an orange or yellow highlighter. That paper is now capable of "viewing" UV.

 

[laserdelic]

Hummm, are you sure?. Why should it cost 41USD, then?.

The site says:

"The aperture converts invisible 190-390nm light to a visible orange with a minimum sensitivity of 1mJ/cm2 and a maximum damage threshold of 10J/cm2"[...]

So it seems to be an aperture filter that converts light to lower wavelenght... if it makes any sense. :thinking:

 

[Cyparagon]

Yes, I'm sure. I assume it's more expensive because it's less likely to catch fire than my paper example. The phosphor is embedded in a cement-based material instead of a cellulose-based material

 

[laserdelic]

I understand... I thought it was a kind of filter to look throught.

Thanks!

 

[jimdt7]

@Cyp You are the best, you know everything....

Is there anything like this but for IR? :thinking:

Jim :san:

 

[Ciaran]

Woah, that device is cool... xD

 

[mrfloppy88]

@Cyp You are the best, you know everything....

Is there anything like this but for IR? :thinking:

Jim :san:

Thorlabs - IR, VIS, and UV Viewing Cards
there is!

 

[Bionic-Badger]

You can also buy some rare-earth doped laser target discs, but they're for green lasers.

 

[Cyparagon]

^Green and shorter wavelength, that is.

 

[BShanahan14rulz]

I've seen some IR detectors at radiohut. Don't remember any mention of what wavelengths, but they were supposed to be used for testing remotes.

Most people have an unfiltered cameraphone, though.