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405nm brightness and prescription glasses

S

SOG

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I tried searching on the forum, But can only find that different weather or air quality will affect the brightness of the 604nm. But I think people who wears a prescription glasses will see them much dimmer, right? Because most sun glasses or prescription glasses block most of the UV a and UV b ?

I love fluorescence by the way, I wonder which object will give the brightest fluorescent affects? Any idea? I know white paper... actually wanted to get one of those uranium balls, not sure how those ball works
 





Wildlands

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Glow In The Dark powder is one of the brightest flourescing items I have seen.

I mixed some in clear silicone and made little glow dots and shapes that really stand out when you hit them with 405nm.

(Glow Inc v10 green is the best)
 
Helios

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It's blue that close enough to UV that it reacts with Florencent materials but its not the UV blocked by description glasses as far as I know.
 
S

SOG

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Oh, I keep thinking the 405nm isn't that exact, I thought half is visible, half is invisible... um....

But what about the uranium ball? only UV can excite it to fluorescence state?

I wonder if only UV, or Near UV light can excite certain matter to fluorescence state? (I searched this online, but don't quite understand the definition)
It's because UV have short wavelength + higher energy ?
 
Helios

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SOG said:
Oh, I keep thinking the 405nm isn't that exact, I thought half is visible, half is invisible... um....

But what about the uranium ball? only UV can excite it to fluorescence state?

I wonder if only UV, or Near UV light can excite certain matter to fluorescence state? (I searched this online, but don't quite understand the definition)
It's because UV have short wavelength + higher energy ?
Click to expand...

Lasers by definition are EXACT in that they only lase at one wavelength. It might not be 405nm exactly but it will only be 1 wavelength whether it be 404 or 406 etc. It varies from diode to diode, temperature and drive current.
 
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JBTexas

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I JUST RECIEVED the 3x Uranium Marbles that I ordered (from United Nuclear) this morning when the mail came... also received the 385nm "black light pen" that I ordered from them. I don't have a 405nm laser yet.

They flouresce real nice with the black light penlight - a bright green.

There are youtube videos with Uranium (glass) Balls / Marbles / 405nm lasers.

You can probably get cheaper uranium marbles from some of the members of the forum... I did a search, and several forum members were selling them a while back.

Some members were CRACKING their balls (it appears mine are already cracked; also they are a little "squashed", so my cracked and squashed uranium balls do not roll around all over the place - which is nice), and then offering them for sale.

(yes - loaded with innuendo)

(P.S. United Nuclear = fast shipping. Ordered Monday, recieved today (Friday) FAST balls! They ship ONLY within the USA and Canada, though, so if you are somewhere else, you may need to go to another forum member to buy their uranium balls).
 
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S

SOG

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Helios said:
Lasers by definition are EXACT in that they only lase at one wavelength. It might not be 405nm exactly but it will only be 1 wavelength whether it be 404 or 406 etc. It varies from diode to diode, temperature and drive current.
Click to expand...

I see! Thanks for the information!


JBTexas said:
I JUST RECIEVED the 3x Uranium Marbles that I ordered (from United Nuclear) this morning when the mail came... also received the 385nm "black light pen" that I ordered from them. I don't have a 405nm laser yet.

They flouresce real nice with the black light penlight - a bright green.

There are youtube videos with Uranium (glass) Balls / Marbles / 405nm lasers.

You can probably get cheaper uranium marbles from some of the members of the forum... I did a search, and several forum members were selling them a while back.

Some members were CRACKING their balls (it appears mine are already cracked; also they are a little "squashed", so my cracked and squashed uranium balls do not roll around all over the place - which is nice), and then offering them for sale.

(yes - loaded with innuendo)

(P.S. United Nuclear = fast shipping. Ordered Monday, recieved today (Friday) FAST balls! They ship ONLY within the USA and Canada, though, so if you are somewhere else, you may need to go to another forum member to buy their uranium balls).
Click to expand...

"black light pen" ?? Um... interesting! I found quite a few nice stuff on that web page ! Now I wonder why would anyone buy some Nuclear Isotopes .... um...

Man I look at their UV flash lights... most of them are sold out... and they didn't say what wavelength are they? or just UV in general?
 
DrSid

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Isotopes are useful for testing devices measuring radiation, also for education. If they only shipped outside US.
Anyway .. 445nm makes glow things too. Generally you need wavelength shorter than that at which the object glow. I have some boxes which glow orange, and they can be made glow with green laser.
Prescription glasses wont block 445,405, and I bet not even 308nm. It's all 'just' and 'almost' ultraviolet.
 
laserhead2112

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My girlfriend has this pink gemstone I think its a C.Z. it glows bright blood red under 405nm its really cool.
 
InfinitusEquitas

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SOG said:
I tried searching on the forum, But can only find that different weather or air quality will affect the brightness of the 604nm. But I think people who wears a prescription glasses will see them much dimmer, right? Because most sun glasses or prescription glasses block most of the UV a and UV b ?

I love fluorescence by the way, I wonder which object will give the brightest fluorescent affects? Any idea? I know white paper... actually wanted to get one of those uranium balls, not sure how those ball works
Click to expand...

Prescription glasses will have almost no effect on 604nm, although it looks like you're really interested in 405nm and 445nm - best wavelengths to get things to fluoresce. 405nm is a A LOT of fun:D

Anyway, as prescription glasses go, I did some tests a while back with an old pair of mine and found them to block out about 10% across the board. Tested for 405nm, 445nm, 532nm, and 650nm.

Of course transition lenses might do more since they specifically react to UV light iirc, but I don't have any of those to test out:p
 
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