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A Guide To Buying Your First Green Laser






You're right, but that wasn't what i meant. The greens will vary in the same way the BluRays do. Your 5mW DX pen is probably a lot more than 5mW, possibly up to 50.
 
I did sort of mention that they're overspec in the cheap stores, but you're right that would be a very good thing to make understood. Excluding the better companies, of course.
 
JaiNobeZ said:
You're right, but that wasn't what i meant. The greens will vary in the same way the BluRays do. Your 5mW DX pen is probably a lot more than 5mW, possibly up to 50.
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I know it may be over spec but i doubt by much. The beam isn't very visible except at night. Even then it's not super bright. I was just wondering if his were more over spec than other sellers.
 
@randomlugia: This is the first thread i remember reading and having internalised information from. We all love greenies and pretty much every new user reads this thread. Thanks for making it. It seems any information put here becomes almost universally understood and respected, that's why i think it'd be a good idea to mention the way that "5mW" lasers are usually underspec. That information isn't quite as universally understood, and it probably should be.
That said, where did you get the 30mW max for looking at the dot from? I haven't heard that anywhere else.

@david1235102: Mehh... i wouldn't be so sure. The other issue is that they're unstable. With safety, it's always better to be cautious so treat it as though it is not a 5mW. Don't stick it in anyone's eyes.
 
JaiNobeZ said:
@david1235102: Mehh... i wouldn't be so sure. The other issue is that they're unstable. With safety, it's always better to be cautious so treat it as though it is not a 5mW. Don't stick it in anyone's eyes.
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I don't. But I do sometimes shine it around for my dog to chase. But usually sunlight is coming in and the lights are on so its already pretty bright in the room.
 
Hmm... i'm not in favour of the use of lasers with pets anyway, but that's just me. You should also probably be aware of infrared damaging your dog's vision, but with pets that's your choice. Not something it's worth me arguing with you about.
 
JaiNobeZ said:
It seems any information put here becomes almost universally understood and respected
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I hadn't noticed, good to know!

That said, where did you get the 30mW max for looking at the dot from? I haven't heard that anywhere else.
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It really just depends on who you ask, though when I joined the forum, it was generally agreed that 30mW was about the point at which you could glance at a dot and not have lasting effects. Of course you could briefly look at a 300mW dot without damage, but it certainly wouldn't be comfortable. I guess what I was trying to say was, "the brightest dot you could comfortably use as a pointer", at least in my opinion.
 
Oh, ok. So it's about comfort and not danger? Thanks for clearing that up, it's puzzled me for a while.
 
Sort of both... I mean, when I look at something and it hurts, I assume that it's bad for my eyes or damaging them.
 
Oh. It doesn't hurt for me. When i asked whether it was for "comfort" i meant like... so you could use it in a presentation without people having spots in their vision. As far as i understand the spots-in-vision thing isn't the result of damage, just the result of the cells in the retina running out of pigment to "fire off".
 
When I say hurt/uncomfortable, I mean more like, "OW!" or when it's so bright you have to squint or look away. Spots-in-vision doesn't really bother me. I just realized that the statement ended up being more complicated than it should have... lol. You've basically got the idea though, it's personally the highest power I would use for pointing.

But with that said, I still wouldn't use anything above 5mW for presentations, just because you never know what will happen with a lot of people. Then there might be a reflective thing you hadn't counted on, and when you only need to see the dot, IMO 30mW is just plain too bright.
 
Is 30mW of green so bright you have to squint & look away? Weird. That's only the case for me if the room is very dark.

And, i would agree... unless the presentation is on lasers! In which case a 1mW cheapie just doesn't cut it.
 
JaiNobeZ said:
Is 30mW of green so bright you have to squint & look away? Weird. That's only the case for me if the room is very dark.
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No, 30mW is about as bright as it gets before I have to squint and look away, in other words I have to do that with powers >30mW.
 
Oh... alright then. I don't really get it much with my 50mW lasers. A little, but not really.
 
sorry I was uncalled for but, are you people talking looking at the laser 10cm away or 1 meter away? ^^
 
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