Old 5mw "eBay" laser questions.

Nute · Oct 20, 2014

Tha Greenlander said:
I don't think he will listen, he hasen't listened to my advice. Could be wrong though....

-Alex

Was worth a try. I would want someone to try if my 15 y/o was fkn up. You are all good people, who give great advice, but it is up to the OP to take it. He probably won't listen, but for the sake of our hobby, I hope he does.

The Lightning Stalker · Oct 20, 2014

Nute said:
Was worth a try. I would want someone to try if my 15 y/o was fkn up. You are all good people, who give great advice, but it is up to the OP to take it. He probably won't listen, but for the sake of our hobby, I hope he does.

Exactly. If he isn't listening to his
father, I'm hoping he will at least listen
to us. I'm still worried he might take it
to school or show it to a "friend".
Someone will inevitably get a hold of it
and there is a good chance they will shine
it in someone's or their own eye. Then you
are in BIG, and I do mean BIG
trouble.

Be safe out there.

Marco Polo · Oct 20, 2014

USAbro said:
Also, I have these old night vision goggles that detect infrared and when looking at the laser dot through them, there is the dot, and then a huge square of infrared around the dot to one side and it's super bright threw the goggles but completely invisible to me. Is this IR dangerous?

I'd be interested in seeing a picture of this. There is a concentric IR laser beam sharing the same axis as the green, so if you avoid the green you also avoid the IR as well. Am curious about the 'hidden' IR artifacts/emissions from these lasers though.

Better lasers have IR filters to block these things, but cheaper units don't unless you install it yourself.

My thoughts are that the IR square probably isn't overly dangerous due to its high divergence; figure a 300mW pump diode but the energy density in the square should be low compared to the laser beam. It's probably some sort of artifact similar to the "Osram square" that you see in the PL450 and PL520 diodes. I wouldn't put my face in it regardless, since it would be uncomfortable to look at if it were visible and it's hard to be certain as to just how much power is there. I wonder if the square is 808nm or 1064. I suspect 808.

One thing does need to be said about these lasers' IR emissions. I generally say that the IR is not dangerous due to the fact that most of the IR is concentric with the green beam, and as long as you avoid the green you avoid the IR as well. The green output is dangerous enough in itself that you will definitely want to avoid it regardless of whether your laser is IR filtered.

The IR emission only becomes a real danger, ironically, when safety glasses get involved. The green laser is generally stopped by short-wavelength safety glasses, i.e. the ones that are yellow or red in color. Unfortunately, such safety glasses usually don't block IR at all. As far as the IR is concerned, those safety glasses aren't even there. Unless the safety glasses are specifically rated to block both IR and short-λ, they will pass IR with no attenuation. That poses an eye hazard by definition, and it is a serious hazard once you get into tens of mW. Your blink reflex won't protect you either so that is a further problem.

USAbro · Oct 20, 2014

Marco Polo said:
I'd be interested in seeing a picture of this. There is a concentric IR laser beam sharing the same axis as the green, so if you avoid the green you also avoid the IR as well. Am curious about the 'hidden' IR artifacts/emissions from these lasers though.

Better lasers have IR filters to block these things, but cheaper units don't unless you install it yourself.

My thoughts are that the IR square probably isn't overly dangerous due to its high divergence; figure a 300mW pump diode but the energy density in the square should be low compared to the laser beam. It's probably some sort of artifact similar to the "Osram square" that you see in the PL450 and PL520 diodes. I wouldn't put my face in it regardless, since it would be uncomfortable to look at if it were visible and it's hard to be certain as to just how much power is there. I wonder if the square is 808nm or 1064. I suspect 808.

One thing does need to be said about these lasers' IR emissions. I generally say that the IR is not dangerous due to the fact that most of the IR is concentric with the green beam, and as long as you avoid the green you avoid the IR as well. The green output is dangerous enough in itself that you will definitely want to avoid it regardless of whether your laser is IR filtered.

The IR emission only becomes a real danger, ironically, when safety glasses get involved. The green laser is generally stopped by short-wavelength safety glasses, i.e. the ones that are yellow or red in color. Unfortunately, such safety glasses usually don't block IR at all. As far as the IR is concerned, those safety glasses aren't even there. Unless the safety glasses are specifically rated to block both IR and short-λ, they will pass IR with no attenuation. That poses an eye hazard by definition, and it is a serious hazard once you get into tens of mW. Your blink reflex won't protect you either so that is a further problem.

I tried to take a video through the goggles but since it's such a small hole it's like taking a picture in a microscope.

USAbro · Oct 20, 2014

Well guys here is the link. Take a look at the glasses provided. I contacted the seller and he said it was one watt. They don't post mw because they can't use paypal for hp lasers.

High Power 445nm Focus Visible Blue Beam Laser Pointer Pen Boxset with 5 Caps | eBay

Guys, I am listening. I'm trying to find some glasses that I can afford. I've read about the people blinded and although you may think otherwise, I'm not a complete idiot.

Are these glasses okay? Eye Protection Safety Goggles Anti Laser Glasses for 532nm Green Blue Red Beams | eBay

If not, can someone leave me an eBay or amazon link. I typically don't like using cc for sites I don't know however, for my eye protection I might have to.

Thanks Guys!

ps. I also had an ultra fire battery explode 2 days ago on my kitchen table. Little copper tin and black ash everywhere. Never use ultrafire or trustfire.

LaserBeams · Oct 20, 2014

USAbro said:
Well guys here is the link. Take a look at the glasses provided. I contacted the seller and he said it was one watt. They don't post mw because they can't use paypal for hp lasers.

High Power 445nm Focus Visible Blue Beam Laser Pointer Pen Boxset with 5 Caps | eBay

Guys, I am listening. I'm trying to find some glasses that I can afford. I've read about the people blinded and although you may think otherwise, I'm not a complete idiot.

Are these glasses okay? Eye Protection Safety Goggles Anti Laser Glasses for 532nm Green Blue Red Beams | eBay

If not, can someone leave me an eBay or amazon link. I typically don't like using cc for sites I don't know however, for my eye protection I might have to.

Thanks Guys!

ps. I also had an ultra fire battery explode 2 days ago on my kitchen table. Little copper tin and black ash everywhere. Never use ultrafire or trustfire.

I just made a few videos on the same laser. (From the same seller)

I would say it's over 1 watt... On my module it states 1.6 watt has crazy burning power too I lit a few candles etc.

MAKE SURE YOU'VE GOT THE CORRECT GOGGLES AND DO NOT USE THE ONES INCLUDED WITH THIS LASER ALTHOUGH I USED THEM JUST FOR THE CAMERA TO SHOW WHAT THEY SHOULD BE DOING.... OR CLOSE - THE BATTERIES ARE RUBBISH THE LASER DRAINS THEM WITHIN 10 MINS

I just shown an example of what they goggles should do (for the camera)

For the price of this laser, I'm well happy

See my sig for links to my channel if you want to see a unboxing burning review of the laser.

You should really listen to the advise people are giving you on here. It's a great site to learn a lot about lasers!

PS sorry to just jump on the post people.

LaserBeams · Oct 20, 2014

See the video, some light did creep though the included goggles (I already had laser shades on) but the camera shown some very dull light when I looked at the video.

EDIT: see my post on here about the laser http://laserpointerforums.com/f65/grabbed-laser-just-bit-fun-91156.html

USAbro · Oct 20, 2014

LaserBeams said:
See the video, some light did creep though the included goggles (I already had laser shades on) but the camera shown some very dull light when I looked at the video.

EDIT: see my post on here about the laser http://laserpointerforums.com/f65/grabbed-laser-just-bit-fun-91156.html

Your video seriously excites me! Are the included safety goggles okay to use? If not, why? What is the OD. I didn't know it could light a candle! Impressive. Seems like a good buy. You think so?

LaserBeams · Oct 21, 2014

USAbro said:
Your video seriously excites me! Are the included safety goggles okay to use? If not, why? What is the OD. I didn't know it could light a candle! Impressive. Seems like a good buy. You think so?

See my above post I think you missed it.

I wouldn't recommend using them BUT they DO block most of the light, or so it seems on the video.

I guess they are better than using non (that would be very silly)

But try get some decent ones, there are plenty of posts on here on the correct laser shades + many great tips!

I love this forum, I've learned so much just from reading threads - I recommend you to do the same.

USAbro · Oct 21, 2014

Okay so I read your review and it looks awesome but are you sure it's the same one as mine? The host looks the same but do you think it is the same power. The one you reviewed cost $169. Mine cost $85.99

What's the difference. Why is the price difference so drastic.

Marco Polo · Oct 21, 2014

USAbro said:
Okay so I read your review and it looks awesome but are you sure it's the same one as mine? The host looks the same but do you think it is the same power. The one you reviewed cost $169. Mine cost $85.99

What's the difference. Why is the price difference so drastic.

Absolutely no way to tell if they are the same or different. My guess is different. The host is generic and is manufactured in the middle of who-knows-where, and the laser builders/sellers install whatever they want into it.

That's why you're better off building your own, you get to control what goes into it, and since parts are somewhat standardized, you can replace them if anything breaks. It's more expensive up-front, but if you build it properly and don't drive the diode to death the long-run cost can be less.

Plus, if you build the laser properly, then if need be, you can sell it and recover most of your money. IsaacT does that a lot – build it, play with it, sell it, use funds to build something else.

Just remembered you asked about your green "5mW" lasers. Mine cost 25 dollars or so in early 2013. They are "Laser 301" variants. They all metered at ~70mW total (20mW IR). My Lazerer LZCS-532 meters at 100mW green. The 532 I got from Fasttech meters at 120mW total, ~20mW IR. These are apparently good examples. Poor-quality modules can emit multiple tens of mW in IR, in some cases, more IR than green. No way to know if yours are good or bad without testing but that is a ballpark figure.

USAbro · Oct 21, 2014

At this pointer I'm talking about the blue laser I just ordered.

xirrious · Oct 24, 2014

Dude you do not need ANY high powered lasers. Seriously

RB astro · Oct 24, 2014

Thought for the day.
"Eyes are replaceable whereas lasers are not..."
Hoping some reverse psychology will work. :shhh:

LaserBeams · Oct 24, 2014

USAbro said:
Okay so I read your review and it looks awesome but are you sure it's the same one as mine? The host looks the same but do you think it is the same power. The one you reviewed cost $169. Mine cost $85.99

What's the difference. Why is the price difference so drastic.

Where did you find that price? the link you posted above is US $85.99 - the one I got (which is the link you posted) hence me commenting on the laser as I have the same one as in the listing plus it's the same seller.

I was going by the link you posted, seems you posted the wrong one??

USAbro · Oct 24, 2014

LaserBeams said:
Where did you find that price? the link you posted above is US $85.99 - the one I got (which is the link you posted) hence me commenting on the laser as I have the same one as in the listing plus it's the same seller.

I was going by the link you posted, seems you posted the wrong one??

Sorry I got two users mixed up. You and Lazeerer. He did a review on it and said it was 169. Will this laser get through US customs?

Old 5mw "eBay" laser questions.

Nute

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The Lightning Stalker

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Marco Polo

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USAbro

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USAbro

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LaserBeams

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LaserBeams

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USAbro

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LaserBeams

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USAbro

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Marco Polo

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USAbro

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xirrious

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RB astro

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LaserBeams

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USAbro

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