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Yeah most light bulbs flicker at 60Hz anyways, so if a 50% cycle diode can be driven at say 120Hz (do high frequencies destroy diodes? Sorry just have 0 PWM experience) then it would probably appear as a steady beam

If you pulse it fast enough you won't even tell its off half the time no?

How the hell do they deal with the weed soot that's going to build up on the lens? Or is the laser constantly being attenuated by 40% or so due to it anyways?

That is a very good question; is there an analytical solution that takes in any given material's atomic and molecular structure and outputs how much light it would absorb. AFAIK, such an equation does not and will not exist for some time. For instance, with radio waves longer wavelengths...

Sadly the DHL global shipping is quite expensive... If only I had someone in China who could receive it and forward it to me (with duties declaration of course, ain't tryna get on the tax evaders list)

Wouldn't exactly call anything that can't fit in my pocket that portable but looks like a nice build :)

Booring, another non-portable unaffordable build... see this guy instead :)

Yeah its best to start small, once you figure out the optics with low powers its simple to upscale them

Don't get me wrong that's really cool, but wouldn't it have been easier to just add a Bluetooth module and link it to a phone app to control the menu?

By all means if you have a scope buy away and test them for spikes before hooking them to a laser

If the dot at say 20 feet is circular, its single mode. Otherwise if it is rectangular it is not single mode

Necroposting is only bad when it leads to confusion and repeated discussions, but its cool to know Lasence was around in 2009

Sure they might work but it will be cheaper and less heat-producing to just buy some AMC7135's for 10 cents a piece and make your own driver. See this post for wiring: https://laserpointerforums.com/threads/the-absolute-cheapest-proper-diode-driver.107361/

Just resellers, probably not a scam but it's safer to buy from eBay or some other escrow that is able to refund you guaranteed if the laser arrives defective

This has actually been an ongoing question for me, how does one calculate the theoretical limit of brightness perception of a given frequency as per Fechner's law?: https://en.wikipedia.org/wiki/Weber%E2%80%93Fechner_law#Fechner's_law I get that the relation is logarithmic, but how would one...

Could it be LiLuF4 as proposed in this thread?: https://www.photonlexicon.com/forums/showthread.php/27001-Frequency-doubling-into-the-yellow/page7

LPF specializes more in visible wavelengths, but generic 1W IR laser diodes can be had for <$15 from eBay. Or you could even buy a used FAP or other fiber-coupled IR module for cheap second hand FYI, I have a 2W IR laser and electronic goggles through which I can see the beam... its not as fun...

Next up, using lasers to create antimatter (via the pair production mechanism)

Personally I like to use the densest, largest possible batteries in my builds to maximize runtime

Just saw there's this one too, but not sure how reliable: https://laserpointerstore.com/products/cni-glp-589nm-yellow-laser-pointer?_pos=1&_sid=b1cf1c251&_ss=r