fluorescence under 532nm

LazerGuy said:

What color does peanuts fluoresce to? (I actually think that FML made a topic about this, but I can't find it anymore).
The fluorescence is the main reason to why I am geting a BR, and >120mw of BR fluorescing must look spectacular! I can't wait!

I have only heard about fluorescence from a shorter wavelength to a longer one, but is it possible to make it backwards, a longer to a shorter wavelenth? :-/
And Schrecken Licht, nice pic! But how come that it looks kinda purple on the pic? :-?

Click to expand...

It looks white with a purple tint to it. The afterglow is yellow but very dim. A CRT TV-screen has a very cool GITD-effect BR, also yellow but much brighter.

I made a discovery with my x-125 recently. When I point it at a white wall in my room and put on my goggles, I can see a orange afterglow in the paint!


I don't think that it's possible to make a longer wavelength shorter in this way tho.

I don't think that it's possible to make a longer wavelength shorter in this way tho.

Click to expand...

No, you're right, it's not.Go read up on fluorescence to see why.

Great Picture, I was wondering will an item like your plexi keep emitting such a bright light forever as long as the laser points at it or will the effect fade over time?

Click to expand...

I never thought about this. :-/ I haven't really noticed anything lose it's fluorescence potential over time, but maybe it requires a lot of time or a lot of light to cause a lot of fluoarescence.

Dude you must have some wierd ear wax, I think its just the Q-tips that make the dot really bright ( just tried it lol );D

Diachi

Never mind its normal, I was doing it with a collimated laser, didnt notice it to I looked through my piece of glass that filters green so I could only see the orange instead of bright green

Diachi

OK stuck the glass Over my camera lens and you can see it, not very clearly though . Ill upload pics if you want when I find the USB for my phone .

Diachi

EDIT : its a lot easier to see flourescense with green if you hae goggles on I dont have goggles but I have glass slides that reflect alot of the green part of the spectrum, so i use that, So far my bass guitar flouresces, my glasses case flouresces, my ear wax, my drill and some wires.

Diachi

Switch said:

Great Picture, I was wondering will an item like your plexi keep emitting such a bright light forever as long as the laser points at it or will the effect fade over time?

Click to expand...

I never thought about this. :-/ I haven't really noticed anything lose it's fluorescence potential over time, but maybe it requires a lot of time or a lot of light to cause a lot of fluoarescence.

Click to expand...

Well, what makes things fluoresce?  Electrons.  Electrons are absorbing energy, rising to a higher state, and falling back down to a lower energy state after time.  When they fall, they have to give up that extra energy, and give it off in the form of light.  The electron doesn't go anywhere, It's still right there where it was the first time (basically), so it can be energized again and do the same thing over again.  Making it fluoresce doesn't remove the electrons or lessen their ability to change energy states, so in theory, there's no reason I can think of that a material's ability to fluoresce should decrease over time.  And in theory, there's no difference between theory and practice.

However, temperature will actually change a thing's ability to fluoresce in some materials, so shining your light on it will increase the temperature and MAY change the amount of fluorescence.  But the temperatures and amounts of light would be pretty much imperceptible to you at all, and the temperatures for the cases where I've heard of practical uses for this (fluorescence thermometry) are inaccessible to us all anyway. But maybe there are some materials that could show good low-temperature temperature-dependent fluorescence. That would be pretty awesome.

No matter how hard us guys try, a little always gets on the floor.

usakicksass said:

No matter how hard us guys try, a little always gets on the floor.

Click to expand...

Yup.
have you seen that episode of mythbusters where they ran that fecal matter on toothbrushes test?

nikokapo said:

[quote author=usakicksass link=1210914708/12#22 date=1213933962]No matter how hard us guys try, a little always gets on the floor.

Click to expand...

Yup.
have you seen that episode of mythbusters where they ran that fecal matter on toothbrushes test?[/quote]


One of my favorites. IIRC The "dirtiest" one was the "control" toothbrush in the kitchen ;D ;D

Peace,
dave

coliform

LazerGuy said:

What color does peanuts fluoresce to? (I actually think that FML made a topic about this, but I can't find it anymore).
The fluorescence is the main reason to why I am geting a BR, and >120mw of BR fluorescing must look spectacular! I can't wait!

I have only heard about fluorescence from a shorter wavelength to a longer one, but is it possible to make it backwards, a longer to a shorter wavelenth? :-/
And Schrecken Licht, nice pic! But how come that it looks kinda purple on the pic? :-?

Click to expand...

I don't know - I think that's something to do with the camera and the way it reads the colors....kind of like when photographing the dot of a green laser sometimes (at least with my camera) it looks blue-ish. I didn't see that purple effect with my eyes, though.

LazerGuy said:

The fluorescence is the main reason to why I am geting a BR, and >120mw of BR fluorescing must look spectacular! I can't wait!

Click to expand...

With blu-rays reaching these power outputs, they can "overpower" the fluorescence of a material. I've found that for some materials I need to use a diffraction grating to really see the colors that the materials are fluorescing.

You've got to decrease the dazzle

Peace,
dave

daguin said:

[quote author=LazerGuy link=1210914708/12#14 date=1213557599]
The fluorescence is the main reason to why I am geting a BR, and >120mw of BR fluorescing must look spectacular! I can't wait!

Click to expand...

With blu-rays reaching these power outputs, they can "overpower" the fluorescence of a material.  I've found that for some materials I need to use a diffraction grating to really see the colors that the materials are fluorescing.

You've got to decrease the dazzle

Peace,
dave
[/quote]
So the material can only fluorece so much.I always wondered if there's a limit.

Switch said:

So the material can only fluorece so much.I always wondered if there's a limit.

Click to expand...

The amount of light emitted by the fluorescent action is limited. Once the fluorescence starts and is combined with the 405nm reflecting and both mix in the air, the resulting "dazzle" can be brighter than the fluorescence. It is still fluorescing, you just cant see it. When I really want to enjoy the fluorescence only (here in my office), I use my 11mW pen. Outside or in a cave or in a mine, I use a diffraction grating.

Peace,
dave

daguin said:

[quote author=LazerGuy link=1210914708/12#14 date=1213557599]
The fluorescence is the main reason to why I am geting a BR, and >120mw of BR fluorescing must look spectacular! I can't wait!

Click to expand...

With blu-rays reaching these power outputs, they can "overpower" the fluorescence of a material. I've found that for some materials I need to use a diffraction grating to really see the colors that the materials are fluorescing.

You've got to decrease the dazzle

Peace,
dave
[/quote]
...and use goggles!!! It's so much better with goggles.

Yeah you can use some good 405nm glasses (or even some clear UV protective sunglasses).They should allow you too see the flourescence only and block shorter waves.