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Obviously lasers are not useless but there are many hobbies out there that provide (compared to lasers) much more fun and day-to-day utility at a lower price Yes the danger aspect does hinder laser participation too, but if not for that the above still remains. I think most collecting hobbies...

Of course I won't explicitly go out and buy expensive hardware just for this purpose, but I could use this as incentive for me to get a better VR setup which I could hack an extra camera into (obviously making covers for the other cameras while in use, wouldn't want to damage those) :sneaky...

Well an LPM can sanity check goggles (obviously if it fails the LPM test it will also fail the proper test) Maybe moving forward I'll just build a higher resolution VR headset with an easily swappable CMOS and use it as my "laser safety goggles" The thought that I'm not 100% guaranteed safe in...

Also lasers are an expensive (and comparatively useless) hobby... its normal for there to be less people engaged in it compared to say lock picking or drone flying

By independent testing I meant shipping it to sytropyro or Joe Blow is not sufficient, it needs to be sent to an actual lab with the right equipment

Point in case is, since SL is such a popular US-based vendor of these goggles, they have a reputation to uphold which is being challenged right now. Instead of blindly trusting independent testing, SL should be spending a few hundred dollars to test batches every now and then. Increasing prices...

This my friend is called a Free Electron Laser. It will work, but at the moment the technology has not advanced enough for any of us to be able to afford it let alone build it into a handheld laser The IR lasers in that experiment were used to manipulate hydrogen atoms to presumably control the...

Those were Alibaba lasers afaik, and for $300 its a bargain (not to say I'd ever buy it, why buy $300 of yellow when I could buy a $5 laser of the same power just 20 nm away)

Probably a short circuit somewhere in there, happened to me before... triple check your connections, set your driver to a lower output, and test on a cheapo diode before hooking it up for real

This guy said he was running it at 620mA without any problems for over a year. Correlated with DTR's measurements, this would give an output power of 0.948W but I imagine a couple more mA wouldn't hurt... I don't think he needed a TEC, in fact I have never seen anybody have to use TEC for such...

That 300mW diode is well known for being overdriven to 1W+, haven't done it myself but have heard good things in terms of its reliability at those high powers. BDR-209 is single mode and much more finicky at high powers afaik

I really don't see what the problem is, your 20 pcs deal costed $0.02/mW while a 1W+ diode from eBay (https://www.ebay.com/itm/174766429732)--assuming you run it at 1.5W, which it has been proven to easily handle--costs $0.019/mW The cost/mW is nearly identical?

WLC to LPF! After owning a 1W red and a 1W green, I don't think green is a very good astronomy laser since it deactivates your eyes' natural night vision due to how bright it is. Red is a better choice, and can still do substantial burning. Even a 500mW red laser can be highly visible once your...

I don't know of any green tri-beams, care to post a few pics?

you could try wiring a small current regulator into the laser (capped at no more than 50 mA) at each polarity and see which one causes the laser to light. The one that causes it to light will be the correct polarity as for repair, without schematics chances are you will need to either swap out...

This is more for traditional non-semiconductor lasers, but here you go: https://www.repairfaq.org/sam/lasertoc.htm

Taobao, eBay, DTR, Survival Laser, Amazon, Aliexpress, Alibaba, Digikey, RFQ, local machine shop/hacker space, etc.

If you have kids or younger siblings you might want to invest in some sort of locking container. Personally I use ammo cases with regular padlocks

That's why all my lasers are DIY... can't scam yourself lol

Sure, if you don't have an LPM to verify them yourself paying 30-40% extra might not be so bad ;)