Very overspec 445nm laserpen.

With all the threads about overspec green and voilet lasers I decided to make a real overspec laserpen.
I have a junkbox of old laserpens and some parts are re-used in my build.
With the X-Switch of Lazeerer I have a real regulated driver instead of direct driving the diode. :beer:
This driver is set at 1.25A and I had some doubt about heatsinking the diode and the driver in such small host. It turns well as you will see in the LMP chart. Two 10440 li-ion reachargable batteries are needed for this laser.

I hope you like it. :thanks:

Junk box of laser parts.


The parts I am using in this build.


A brass spacer was made from a broken green module. I strip all the unnecessary parts like the diode, lens, crystalset etc.


The driver was epoxied to the brass piece.


The non-threaded module was slightly larger in diameter than the other module. It is a perfect fit.


Connecting the silicon wire to the driver.


I used a spring from an old laserpen and bent the metal a little.


The brass piece is hollow from inside and has a substantial mass.


The G1 lens was fixed with silicone glue. I used much more glue around the lens than shown in the picture. It is a non-permanent fix


Heatsinking the regulator and solder the second spring for the positive pole.


The complete 445nm module.


MUHAHAHA ! my secret weapon. The warning label is mentioning 5mW max.


:shhh::evil::gun:

...that's absolutely incredible. Props!

Trevor

Holy crap 1591mW! Very overspec indeed. :drool:

How is the duty cycle? What material is the driver heatsink? Looks like a lump of graphite.

+1

Another amazing build. You never cease to amaze me.

Zeebit said:

Holy crap 1591mW! Very overspec indeed. :drool:

How is the duty cycle? What material is the driver heatsink? Looks like a lump of graphite.

+1

Click to expand...

The black material is high density foam also known as thermal pad. They are used as bridge between two component which needs thermally connected. You find them in harvested DVD writers, laserpens etc.

You can read the duty cycle for yourself in the LPM chart. You see a declining power in the first 60sec but still 1.5W in the end.
I would guest 60sec on and 5 min cooldown.

I see. Somewhat similar to thermal tape.

Ah yes. I've seen these on low TDP areas of motherboards like the northbridge/southbridge.

I got a lot of those pads from rrod Xbox 360s I fix.

Yes, they are very useful to bridge the gap but normally I use pieces of metal for heatsinking and not thermal pad. Just for this fun build.

I need also pads on the other side of the driver to even the pressure.

Those copper module does make it much stable than the aixiz ones.. Pretty darn good build man.. almost 1.6W out of a very humble looking 5mW pointer is genuinely most undoubtedly downright epic!

Wait, that host I've seen it before... Where.... Where....?




J/k nice build seems like it will be one for the record books.

Sweet blord really nice looking laser! Also the duty cycle is longer then i anticipated :beer:

Greetings,,

Edit: we want beamshots!! Especially with your amazing camera

I just made a video

I'm all over this one if you eventually sell it, looks great! Very nice micro build skills.

it would be soooo sweet if you could use that silver cap at the top of this laser to focus it! Shouldn't be too hard right?

greetings,,

Well it is possible. The silver top is pushing the entire module in the pen and preventing it from falling out. I will have to fix the module in the host and leave the top free.
This silver top can then glue to the lensbarrel to make it focusable.
Maybe for penbuild version II. I need a second X-Switch.

The 1.6W output is able to smoke any soft material. It don't need to focus in a pin point.

Sweet!

Low battery life though.