Topic: Green Laser Pointers *400/600/800/1000/2000MW (Refund if seized) - page 3. (Read 13883 times)

Not to defend him or anything, but I think he means that you might accidentally cause eye damage to another person or animal. Even the scattered light from the laser off of shiny surfaces, like water or buildings, might be enough to cause damage, it doesn't have to be a full beam.

I wish you would do some research before (and not just you, but everyone who is ill informed) spouting nonsense.  I can only be blinded if it hits me in the eye, well, how about I don't shine it in my eye?  And what felonious charges do you speak of?  Cite some precedent where it is illegal to own one of these?  You cannot, so you must be talking about being moronic enough to shine at either an airplane, another person, and animal, a cop, a driver...etc...  How stupid do you believe humanity is?  It really is none of your business my intentions with it.  But please do not harass me if your ill informed.  If someone is stupid enough to shine these at the aforementioned, then they deserve their punishment, and your small post will hardly deter them, but I will not get in any kind of trouble and I hardly need you telling me where I am right or wrong.  Go FUD elsewhere please.

Enjoy your blindness and/or multiple felonious assault charges.

You do not need them if you very careful, they are advised though.  Just don't point them at reflective surfaces and you'll be fine.  In fact, outdoor use in general is probably just safer.

Be careful, apparently you need special glasses to handle these.

This one is just to have.  My family has always had fun with lasers at the beach, and I figured this would be fun for when we go to Hawaii this winter, but I am starting to think this one may be to powerful and I might also order a lower powered one.  But it never hurts, I can use it for self protection in my apartment, since i am not allowed to have a loaded gun per the complex's rules.  This would be a good second.

Burning off his nipples.

If I might ask, what is your intended use for such a powerful laser?

The OP and I corrected my issue through PM and I got a tracking number for my 2000mw laser yesterday.  I am not sure if there was just miscommunication on my part or what, but I am happy to say that I am getting what I wanted, and am happy with my purchase.  If this one arrives and everything works to specifications, I may get a lower powered one.

Wow OP, pretty unprofessional way to deal with some of your customers. That, and also the fact that these are drop shipped from another source has turned me off from probably getting one. Still following this thread for updates from those that will be receiving these.

And as a quick addendum, Nd:YAG lasers in 532nm don't have a whole bunch of uses beyond being the most practical wavelength for high visibility applications. At 88% efficiency from the optimal 555nm frequency it has the very cool advantage of allowing for decent usability (ie a laser pointer) in a very modest power output footprint (ideally <1mW to stay around class 2, or <5mW for 2B).

Actual industrial uses require you to kick up the output by several orders of magnitude into the low kW range, aka death star levels of power.

For the laser router I mentioned above, something else entirely is required like a CO2 laser. At 30-40mw it's still a class 4 laser, but it'll allow you to make cuts at a massively more reasonable power level.

http://www.synrad.com/vseries/v_series.pdf

What can you use the lasers advertised for sale here for? Pretty much nothing, at least safely. A fixed unit with proper heat management, actual interlocks and much less accidental changes in orientation could be used for a bunch of things. A handheld model is not only less safe, but makes serious compromises in output stability/power management/heat management/bunch of other stuff to be mobile and self-contained.

Fucking seriously, a 2W 532nm as sold here has the power to cause immediate and permanent retinal damage, if not outright blindness, and a ridiculous range up to like a mile and a half. It'll cause a degressive amounts of hopefully temporary blindness or partial vision loss (ie day/week long) up to 5-7 miles.

Beyond that, it's visible up to like 50 miles, so who knows where it'll end up.

Using that kind of output outside of a really, really controlled environment with mass amounts of redundant safety measures is criminally negligent at best. You will cause harm to someone.

This is fun!

There are a bunch of actual legitimate use cases for stupid powerful lasers, aka class 4s.

Laser medicine has a whole bunch of uses:
http://en.wikipedia.org/wiki/Laser_medicine
Don't try these at home.

There are many different applications in manufacturing:
http://en.wikipedia.org/wiki/Laser_beam_machining
http://en.wikipedia.org/wiki/Laser_cutting
There's potential home use here; a relatively benign application is a 2D router laser cutter. Personally I'd start out with something a bit easier like putting a dremel in there, lasers add a legit scary fire hazard to the equation. Containment is also a high priority, because you need to make sure that a stray reflection is in no way putting your eyes (or other people's) at risk.

This brings us to our first PPE side note; ANSI Z136, learn it, love it.
http://en.wikipedia.org/wiki/Laser_safety#Regulations

Quick primer on PPE:
http://en.wikipedia.org/wiki/Laser_safety#Safety_measures
You want wavelenght and power specific eye protection in all cases with class 3B or above laser, and skin protection for class 4.

You want quality, certified PPE. For example, lower class 4 lasers would make me consider at least OD6 protection to cover accidental exposure:
http://www.lasersafety.com/eyewear/polycarbonate/p5e01

Prolonged exposure, higher power and other variables will affect the OD rating required. You are also required to put in similarly rated material in any aperture or viewing window on your laser cutting table.

DO NOT TRUST YOUR SAFETY OR THE SAFETY OF THOSE AROUND YOU BY USING CHEAP, UNCERTIFIED PPE OR OTHER SAFETY EQUIPMENT. If you are unsure of what you need, join a relevant forum and ask for resources and advice.

Beyond that there are plenty of other uses for lasers, but the need for a class 4 laser is debatable at best. A class 3 or even 2B will be plenty for the amateur science dabbler. Same goes for any sane astronomy uses. Definitively stick to class 2B for presentations or messing around with your pets.

Beyond that, just going outside at night with a modest 5mW green laser is tons of fun, so long as you stay courteous to anyone else around you, aka not fucking pointing the beams at people to scare them as certain people *cough*the idiot seller*cough* suggest.

When you've gotten a feel for the various safety issues and what specific project you want to take on, then you build up. Just going 5mW->10mW gives you an appreciable gain in performance, but as you approach 100mW you need to start to seriously think about containment because you have a beam that is an imminent health hazard at short range and a possible distraction tens of miles out.

Going out and just getting a big fuck off class 4 laser without a) a specific application, b) a functional understanding of safety issues and PPE, and c) actual use of proper PPE is beyond insane.

Add to that a whole bunch of issues you have no idea even exists, such as how much IR you laser is spilling. Cheaper models will even have unaligned/ineffective/straight up absent IR filter, which means you could potentially be putting out an order of magnitude more power than you expected, and if your PPE doesn't account for this secondary output wavelength you are in imminent danger.

I could go on and on but tl;dr if you don't know what you're doing, grab a 5mW 532nm green laser to play around with, join a laser enthusiast community and build up from there.

http://en.wikipedia.org/wiki/List_of_laser_applications

In that list, there are plenty of things that can be done by your regular, safer, cheaper, available lasers, like making a laser sight.

Of the things that cannot be done by the safer lasers, the only one you can really do without a lot of extra equipment and training is laser engraving, and cutting/burning stuff.  That's it. Those are the use cases you asked about.

Read about them (lasers are indeed cool)  and learn a lot.

The amount of nasty remarks and insults you give to a person who is just curious and wants to learn about lasers is just disgusting. I didn't attack you at all. I didn't say anything nasty to you. I simply asked. Yet you literally called me a "dumb fuck". Thanks for your answer.

No, that's not sarcasm, that's outright mockery, there is a difference.

You asked for use cases to someone who posted about what a colossally stupid idea is to buy those lasers just for fun.

Do you have the proper PPE (personal protective equipment) and the installations to handle a class 4 laser? no? Then you should not get close to them.

Here is a complete list of GOOD USE CASES for those lasers if you don't have the proper equipment and training:

1) There are none.
2) Still none.

Now, if you do have the proper equipment then you can do all kinds of cool shit, like running some laser interferometer experiments for your Physics thesis. Oh wait, that's some really specialized shit. You meant "good reasons", as in silly wastes of time with dangerous equipment. In that case you can:

1) Blind all sorts of animals by mistake
2) Burn all kinds of shit (this is also easily done with matches, they are cheaper)
3) Burn some different shit.

In other words There are no good use cases for those lasers outside some very technical and specialized stuff.

In yet more words, if you're dumb enough to ask for GOOD USE CASES for those lasers to a person who is telling you not to buy them, then you should not get close to those lasers. By the way, just in case you didn't notice, you were dumb enough to do that.

Please don't get close to those lasers (and please don't mistake this with sarcasm, it is supposed to be insulting, you dumb fuck).

I asked a genuine question. You replied with sarcasm. I'm asking for USE CASES. Tell me uses of this. He stated that unless you are buying for "good reasons" you shouldn't buy this. What are the "good reasons" ? Tell me some.

Sure, see this:


Shine the laser on a white wall, damage someone else's eyes, what other reason do you need? Just for fun. It is not like there a reason for these things to be banned, they are just silly little toys (that can cause blindness) that shine in real pretty colors. So pretty. I'm pretty sure spending 200+ dollars to burn some masking tape and matches with the laser is going to be worth the risk. Specially with the super-high quality googles that surely will come with the laser.

This is a genuine question, please don't take this as sarcasm or something. But I have no "good reason" for buying this. I just want to have a very powerful laser I can use. Can you tell me "good reasons" for owning a laser like this? I'm curious because although I will be really careful and wear glasses, but in the end, I will be buying it "just for fun" and I don't see anything wrong with that.

^^ These two are saying wise words.

Unless you have good reason to want to own a class 4 laser and proper PPE/installations, buying one "just for fun" means you are a complete and utter fucktard.




Jesus. Fucking. Christ.