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Dragon Lasers LSG02?

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New to this forum, let me know if this post violates any rules or is placed incorrectly.

I'm strongly considering procuring a 3W 445nm jetlasers pl-e pro, but as my name would suggest, I'm keen on keeping my retinas intact, along with those of any friends who would like to experiment alongside me.

The Dragon Lasers LSG02 goggles appear to have an optical density rating of over 4 at 445 nm, likely closer to a rough 4.2 per the OD chart listed on the website. This should theoretically bring the 3 watt beam down to less than .3 milliwatts if my math is right.

3 watts in / (10 ^ (4 minimum OD rating)) = .0003 watts into my eye, and my blink reflex comfortably prevents damage.

Using the 4.2 or higher OD rating that appears at 445 if I'm reading correctly, the power into my eye is more like .19 milliwatts or lower into my eye assuming a direct hit.

Now, all of this is fine and good in theory. Great price point, more than sufficient protection; what could possibly go wrong?

In practice, however, my eyes are extremely important to me, and paying a tad under 1/3rd what eagle pairs go for feels sketchy.

Dragon Lasers is listed in good standing on the "where to buy from" thread, and several threads speak well if these goggles, but I'd feel remiss not to ask myself given a couple users in threads on these goggles express doubt. Are these legit?
 

Immo1282

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Hi there!

Good to have a new member who's interested in eye-safety from before day one. That's pretty rare.

Fairly expected of new members round here to post an introduction thread in the Welcome subforum, saying where you're from, what you're into etc. That way advice can be tailored to your location and interests.

Usually most questions have been asked before in some way or other - so make use of the search function to find them (as you have in this case, my bad - I missed that line in your post)...

I don't own a pair of these - but your maths is right. If DL's claims are accurate they should adequately protect you.
 

BowtieGuy

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Hi and welcome to LPF,
I would recommend "Survival Laser" safety glasses/goggles, they are an excellant quality product at a good price.
The dragon Laser goggles may be good, but I don't own any and can't say for sure.
 
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Hi there!

Good to have a new member who's interested in eye-safety from before day one. That's pretty rare.

Fairly expected of new members round here to post an introduction thread in the Welcome subforum, saying where you're from, what you're into etc. That way advice can be tailored to your location and interests.

Usually most questions have been asked before in some way or other - so make use of the search function to find them (as you have in this case, my bad - I missed that line in your post)...

I don't own a pair of these - but your maths is right. If DL's claims are accurate they should adequately protect you.
Just made my welcome post, thanks for the heads up. Read the stickies too, that typical day on LPF vid is fantastic.

Good to hear my math is indeed accurate. If someone could vouch for their current quality I wouldn't think twice. The price is only a factor because I'd like to procure two or three pairs immediately for demonstration purposes.

I could always just buy one eagle pair from survival to be sure and purchase more later, but buying three now would seriously reduce my laser budget and potentially postpone the purchase. In addition, eagle pairs seem overkill, being listed as sufficient for 100watt lasers. This might reduce my dot visibility drastically and unnecessarily for no tangible benefit.

If DL goggles are more than sufficiently light absorbent already, and much much cheaper, my only hold up is about quality. Is it just the coating that maintains this high OD? Would a scratch allow much more light through?

I know you can't put a price on your vision, but this forum seems to trust DL, and the price is very appealing...
 

Immo1282

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The price is only a factor because I'd like to procure two or three pairs immediately for demonstration purposes.

I could always just buy one eagle pair from survival to be sure and purchase more later, but buying three now would seriously reduce my laser budget and potentially postpone the purchase. In addition, eagle pairs seem overkill, being listed as sufficient for 100watt lasers. This might reduce my dot visibility drastically and unnecessarily for no tangible benefit.
It's always possible to upgrade and then retire the less good goggles to ones for other people in demonstrations.

As it's not been said yet - though you sound like you've got heaps of common sense so it's probably a given - NEVER point a beam at anyone, or anything that is not yours without their permission. Goggles are designed to reduce the risk of accidental exposure to reflections etc. If you wear goggles, it's not appropriate to feel invincible and start pointing beams at your eyeballs...

With goggles, your dot visibility will be reduced significantly - if you want to enjoy viewing the naked beams safely, go outside (but you must be careful and aware of airplanes & other people seeing lasers and getting nervous), or view them through a camera after the fact :)
 
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It's always possible to upgrade and then retire the less good goggles to ones for other people in demonstrations.

As it's not been said yet - though you sound like you've got heaps of common sense so it's probably a given - NEVER point a beam at anyone, or anything that is not yours without their permission. Goggles are designed to reduce the risk of accidental exposure to reflections etc. If you wear goggles, it's not appropriate to feel invincible and start pointing beams at your eyeballs...

With goggles, your dot visibility will be reduced significantly - if you want to enjoy viewing the naked beams safely, go outside (but you must be careful and aware of airplanes & other people seeing lasers and getting nervous), or view them through a camera after the fact :)
I think I'll abide by the forums' trust of Dragon Lasers and grab a few pairs from them. Upgrading later is indeed always an option.

I should certainly hope the dot will be less visible through goggles, given that class 4 lasers can damage eyes with only the diffuse reflection. Seeing a beam in clear air through laser goggles is an indicator your goggles probably suck, or don't block that wavelength.

I'm too soft hearted to even hunt myself. I've absolutely no intention of causing pain or permanent disability to any living thing. In addition, the last thing I want is to ruin the fun for myself and every other laser enthusiast by inspiring a sensationalized news story or regulatory effort. Responsibility is not optional when operating devices that maintain hazardous properties at great distances. All it takes is one depraved idiot experimenting on his cat or causing a semi truck accident to get news stories out that get laws passed banning everything over 5mW. I'd rather that idiot not be me nor anyone I introduce to the hobby.
 
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