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What the material is, what colour it is, how dilated your pupils are, and how reflective it is, factor greatly into calculations. Better just not to look at any spot on a diffuse reflection surface within 10m of you without wearing goggles.

Most high power blues are in fact 1w lasers, since there are few diodes at the price point of ~$50 which can output blue, with the exclusion of the single mode 445 Osram which costs more than the C@$io diode used in virtually all 445nm lasers. You just need to focus the point. A 1w 445 can...

It is almost certain that the OD at 405nm is not >4. Consumer goods often advertise "100%" when it clearly is extremely difficult, if not impossible, to get such a level of blocking in glasses. You could try LPMing it, it is probably the only way to find out.

If you are wearing goggles, you will be completely unable to see the projected dot, due to the fact that the energy from the wavelength is very low. Just like beaming at night, it is impossible to do so while wearing goggles. If you are unsure of risks, you would be better off getting a tripod...

I completely agreed with you on that part, which is why I linked him to a pair of 405 absorbing glasses. I was just complaining about your comment on the colour, since it is not always related to the wavelengths it absorbs.

Just look around once in a while in the buy/sell/trade section, bound to have a good one turn up there once in a while.

While the colour does matter, red vs amber just means the red one transmits only red light, while the amber one transmits less red and more yellow light. Whatever the dyes do transmit at ~550-650nm do not have any bearing on whether they will transmit at 400nm. It just happens that your 405/445...

It is the chinese equivalent of ebay or amazon. Other such sites include Taobao (another ebay-like site)

double posted

1) As long it has an OD>4 at 445nm, it is perfectly safe given that you stop shining it at yourself once you realise you have taken a hit from the laser, before the glasses melt. Given that even cheap glasses take >10 seconds to melt, this should be a large enough safety margin. If you are...

In the USA, if you are afraid of being assaulted, you should get a gun, that's the most logical path to take. In countries where you are not allowed to legally carry a gun, I would guess one of those super-torchlights (multiple high powered LEDs) should do the job for flashblinding someone so...

It is vanishingly unlikely that this could have happened, looking at the diffuse dot of even a 100mW, except at very close range in a dark room, would be extremely unlikely to cause any kind of damage, even temporary. The gain of the 100mW dot is far lower than that of even a torchlight, let...

Re: Buying: ~1W laser, USA, Have ~$115, or build website. If you are going for beam, green is the best bet atm. A ~100mw green can easily outshine a 1w blue in terms of beam brightness, due to the fact that green is more visible per watt. And a 100mw green should fit your budget. Also, if you...

Also 405nm would need to be seriously overdriven to hit 1 watt. I suggest you read up on basic information about lasers before asking about them, unless you are attempting to troll.

Actually you could also get one of the benboosts, I believe they are up for sale in the Buy and Trade section.

I still think the heat dissipation will need at least a CPU HSF if you don't want to cook you arm. You are basically putting out the equivalent of an average CPU of heat, so it follows you will need something to cool to the same extent. You will also need to consider the contacts, unless you...

Re: Will these two Lasers burn things?? Anything that can "burn" will also require proper eye protection, and if you don't already know how to get those, it is generally a bad idea.

Why not just get a torchlight? Laser pointers were not and will never be made for "lighting things".

Yup I missed the part about G1 on the sales thread. Okay if the seller is agreeable to this I will paypal him $265 once he ships it to you and you verify it works, and I will paypal you the shipping/MM fees.

Hi, I'll take this, how much total for shipping tracked to Singapore? I already have experience building my own lasers, recently my old pair of goggles broke, so I guess instead of buying one again I could just get this as a set. Just wondering though, what is the duty cycle on this laser? And...