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You all know that when making a laser device, the most difficult part it's focusing without buying a module.
So here it is, a complet guide about how to make a focusable laser module with parts you have lying around.
Everybody havs heared about aixiz module, but they're expensive, at least if you know you can do something similar for free.
This module is not recomended for laser diodes over 300mW, because lens can melt and it's not the best heatsink.
the goals I wanted to achieve are:
-Make it easily focusable.
-Make it with household parts.
-make it nice and durable.
I'm very happy with the final results, the module acts as heatsink and it can focus the laser to a single burning point or a beam.
Step 1: Materials
The parts you will need are:
-A 6v motor case (best from a dead motor).
-The lens from the sled.
-A 5mm (inner diameter) washer.
-Three long bolts for the motor case.
-Three ballpen springs (1cm).
-A laser diode (no more than 300mW).
Step 2: The lens mount
First of all, you'll need to open the motor and extract the rotor, the magnet and the bearing.
When you're done, cut three equidistant notches and round them to the bolts' diameter.
Then, pick the lens from the sled, and carefully put it in the washer hole. Glue it carefully to not drip glue onto the lens; any scratch or glue drop will disturb the beam.
Step 3: Placing the LD
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Solder the wires to the diode ans isolate them with some heatshrink tube.
Now yoh have to press the diode into the case. Inprovise a press and force the diode into the hole.
The hole is 5mm wide and the diode 5.65mm, so, maybe you need to enlarge the hole a bit.
If you add a bit of thermal grease, the heat from the diode will be dissipated better.
Finally, i added a golden brass cover that fits in the motor case and has a 4mm hole for the 3.8mm laser diode.
Step 4: The bolt focuser
Now the washer with the lens can move freely from top to bottom, so three springs will keep it while it still being adjustable.
The tree-bolt-adjustment can shape the beam or fix any lens deviation making possible to focus the laser in a single dot.
Step 5: Done!
Now you can save your money and recycle unused parts to make your own laser module for your next laser project.
Remember that this module is not recomended for diodes over 300mW because lens can melt and it is not a good heatsink (it's iron)
If you have questions or upgrade ideas, comment so all can learn about them.
If you like my project, please vote me for the I Could Make That and Weekend Projects Contests.