Question about WickedLasers' 405nm Nano

PowerConverter · May 14, 2015

So, back in December I ordered all 3 color Nanos from WickedLasers (I know, WickedLasers=Bad :tsk: but they were about to stop selling to USA so I figured why not).

Here's my question:
On the red and green lasers (100m & 15mw respectively), the hazard sticker says class 3b, but the violet (75mw) is class 3r.
I was under the impression that 3r is slightly safer than 3b, but the violet laser has a significantly higher mw rating than the green. Can anyone explain?

Also the WickedLasers website and manual booklet lists all Nanos as 3b. That seems strange...

Edit: secondary question, any reason why the violet laser still emits a tiny bit of light when powered off? The other two do not.

Constandinos97 · May 14, 2015

Well, laser classes go with mW. For example above 500mW it is considered a class IV laser. Maybe the sticker is just wrong. The only explanation I can come up with is that the green one is more hazardous as far as eye damage goes due to the human eye being more sensitive to the 532nm lasers (555nm is the most sensitive point). But then again, this isn't how laser classes work. Other than that, I have no idea

I can't think of a reason why the violet laser emits light when it is supposedly off...

PowerConverter · May 14, 2015

Thanks for the response

I checked my father's violet Nano and its sticker also says 3r. It also doesn't seem to power off completely. Maybe it's just something in the power delivery design for that model.

Constandinos97 · May 14, 2015

Your father owns lasers? That's awesome! I wish mine did as well XD

PowerConverter · May 14, 2015

Yeah he's pretty cool

we use them mostly for stargazing (and occasional sky battles lol) It's been sooo cloudy and rainy this year though

NightExplorer96 · May 15, 2015

Constandinos97 said:
The only explanation I can come up with is that the green one is more hazardous as far as eye damage goes due to the human eye being more sensitive to the 532nm lasers (555nm is the most sensitive point)

All visible light can cause damage if enough of it enters the eye, no matter the wavelength. 500mW's of 532nm light is just as dangerous to our eyes then 500mW of 405nm

-Alex

hwang21 · May 15, 2015

The 405nm should be marked "3B", not "3R". WL has made typos on their warning labels before

The only thing I could think of with your laser not powering off completely, maybe you're seeing some kind of reflection off the coated optics? Maybe parasitic drain that allows the laser to receive a tiny amount of current?

PowerConverter · May 15, 2015

I did a test. I pointed it at a wall 2 feet away in a completely dark room and can see a faint purple circle about 1.5" in diameter. It's definitely lasing. My concern is whether or not it's emitting harmful levels of IR. The batteries still work after several hours so maybe it's not too strong a light.

NightExplorer96 · May 15, 2015

PowerConverter said:
I did a test. I pointed it at a wall 2 feet away in a completely dark room and can see a faint purple circle about 1.5" in diameter. It's definitely lasing. My concern is whether or not it's emitting harmful levels of IR. The batteries still work after several hours so maybe it's not too strong a light.

You don't need to worry about IR light, none is used since 405nm is a diode process.

-Alex

PowerConverter · May 15, 2015

Awesome! Thanks for that info

Constandinos97 · May 15, 2015

Tha Greenlander said:
All visible light can cause damage if enough of it enters the eye, no matter the wavelength. 500mW's of 532nm light is just as dangerous to our eyes then 500mW of 405nm

-Alex

This makes sense actually. I stand corrected, thanks!

Constandinos97 · May 15, 2015

PowerConverter said:
It's definitely lasing. My concern is whether or not it's emitting harmful levels of IR. The batteries still work after several hours so maybe it's not too strong a light.

Like Alex said, there's no IR radiation leaking from the diode. You only need to worry about IR when using a DPSS laser (Diode Pumped Solid State), like a 532nm one or a 473nm. If I'm not mistaken, 593.5nm and 589nm lasers are also DPSS ones. I read that 404nm DPSS lasers have also been produced, but no need to worry about those.

All these kinds of lasers aren't efficient at all (1-5% in most of the cases) and the method to produce them is pretty complex, so that's why they are more expensive

Edit: Sorry for double posting XD

Smeerworst · May 15, 2015

The Nano's have a microprocessor inside them, that's why they eat current and can have a dimm glow when it's off.

Tip:
When not in use, remove the batts.

The Nano's microprocessor enables dual operating modes: Continuous and Momentary.

NightExplorer96 · May 15, 2015

@Constandinos97

Yep, 589 & 593.5 are DPSS & both use a process called SFG(sum frequency generation).

There are tons of DPSS wavelengths out there. Some of them include:
266nm
404nm
457nm
473nm
500nm
515nm
523nm
526nm
532nm
543nm
556nm
561nm
589nm
593.5nm
607nm
656nm
671nm

-Alex

Constandinos97 · May 15, 2015

Tha Greenlander said:
There are tons of DPSS wavelengths out there. Some of them include:
266nm
404nm
457nm
473nm
500nm
515nm
523nm
526nm
532nm
543nm
556nm
561nm
589nm
593.5nm
607nm
656nm
671nm

-Alex

Sure, but few of them are common in handheld lasers or pointers, right? Are there any other WL in use by handheld lasers, other than the ones I mentioned?

NightExplorer96 · May 15, 2015

Constandinos97 said:
Sure, but few of them are common in handheld lasers or pointers, right? Are there any other WL in use by handheld lasers, other than the ones I mentioned?

If you ask CNI they can pretty much put any wavelength you want into a handheld. It depends on how much money you have, & if they feel a quality product can be produced.

I recently asked CNI if they could make a 510nm PGL for example & was quoted $600/USD which ain't too bad!

-Alex

Question about WickedLasers' 405nm Nano

PowerConverter

0

Constandinos97

0

PowerConverter

0

Constandinos97

0

PowerConverter

0

NightExplorer96

0

hwang21

0

PowerConverter

0

NightExplorer96

0

PowerConverter

0

Constandinos97

0

Constandinos97

0

Smeerworst

0

NightExplorer96

0

Constandinos97

0

NightExplorer96

0

Online statistics

Forum statistics

Share this page