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I just said OD6 for extra safety and ease of mind, and because certified laser goggles are tested for the actual energy density they can withstand over a short time which I presume is higher with higher OD (someone correct me if I'm wrong). I'm not entirely sure if OD4 is appropriate but I...

How old are you? I think it's your decision and no one here can make it for you. If you're an adult just be careful, wear the appropriate OD6+ goggles, don't use it around people, animals, vehicles etc or reflective surfaces. You can purchase one with a lens cap and keylock tailcap (e.g. from...

Alternatively you could find some tree-climbing animals and make them chase a cheap 5mw laser pointer up to the nests to knock them down

Handheld lasers only burn at close range when focused to a small point (or if sufficiently powerful focused to infinity). However the beam can go for miles and blind anyone that takes a direct hit or reflection. Obviously both scenarios are dangerous. While we're talking about drones, why not...

Impressive build, thanks for the English captions. The 3D printed part and the digital meters on it are awesome. The power to melt glass is terrifying. Do you have a link to or the name of the software you used to simulate the optics and choose the right lens combination?

1) Before I get to any other point, you should be wearing the appropriate OD6+ safety goggles (from laserglow) while using this potentially Class IV laser. If you aren't then don't go any further 2) Burning depends on power density. Make sure the beam is focused down to a small dot for burning...

Where is all this coming from?

Not quite. No need for the big quote, just meant you should reply in a single post instead of spamming one after the other. Maybe we should PM if you want to continue the conversation since this isn't even the original point of the thread which was posted in 2020 ;) Congrats on the purchase...

It really depends on the member. Some people here use them professionally or for research, many are electronics hobbyists who have accumulated knowledge from building lasers and taking them apart. Some are simply fascinated by them and collect different wavelengths. There are even laser...

They are fine for lower power, just not higher. Think of it like this. Each OD number represents a magnitude of 10 that the power is being reduced. And for laser power to be safe for your eyes, it must be as low as possible. So OD2+ gives you 1% of 7500mW or 75mW still going into your eye. Not...

Sanwu shouldn't dissappoint. As you asked earlier, no modifications should be necessary out the box unless you want to switch lenses or use an attachment like a beam expander. Also I get how it's annoying but assumption that people are dumb on this forum has probably saved someone's eyes before...

That's referring to single or multimode switch operation, not the laser diode. The diode output is definitely multimode (i.e. high divergence, not a perfect circle). The multimode switch being offered there gives you things like low power mode, strobe, etc

How safe is it (for battery health or in general) to leave lithium batteries out for a long time without discharging and charging them regularly? For instance let's say I have a laser I rarely use that takes a 26650 batt. It's fully charged but since I only use the laser on occassion it can...

https://www.nature.com/articles/s41566-017-0081-4

Thanks Curtis. Brucemir's work is awesome, he was one of the first members I PM'd on here. ArcticDude is also a beast, his album with Sanwu's RGB is major inspiration. I've stumbled across old threads with Radim's laser painting but all the media no longer loads, would love to see it if any is...

I've read other cases of people seeing below 400nm and seeing 808nm as a deep red. One explanation is that everyone's eyes have slightly different limits but 400-700nm fits the average of most human eyes. Explanation 2: laser diodes have an emission spectrum wider than just a singular...

Exploring how I can create art with my laser collection. I created this video by taking several long exposure shots and making a stop motion animation. (with sound) Lasers I used were all approximately 50mw: 485nm, 520nm, 589nm, 635nm Just made this for fun and to explore the materials and...

Thanks! You're right, liquid sun is a great name for the color And I'd love if you could PM or post some pics of that lemony 575 as well if you get the chance. Hmm I could try testing the effect temperature has on the laser. I could see both hot and cold ambient temps messing things up in...

I'm on the younger side of legal aged. But I remember I got interested in lasers around 10 years old and dpss greens were already on the market. I didn't know s*** about the technical or even safety side of lasers (beyond power and wavelength) but I always had good intentions and knew to stay...

I would expect the answer to be Sanwu