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Old 04-06-2014, 03:12 AM #1
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Talking DIY PLTB450B 450nm Laser Build

Hey guys,
After reading about the Osram PLTB450B diode, I decided to order one from DTR in a copper module.
I had a spare block of aluminum sitting around collecting dust so I made it into a heatsink.(The blue heatsinks are just for show)



I think it turned out great but I'd like to know some of your opinions on it.
Here is a picture from the side showing the set screw and both heatsinks.



Here is a picture of the driver. It is a basic LM317 driver slimmed down a bit with a tactile momentary switch.



Here is the laser on the LPM. I have it running 650ma for ~500mw out. I'm not driving it at 1.6W because my dad doesn't want me to run it much over 500mw.



Lastly, I would like to mention a bit about safety. With ANY burning laser, whether 50mw or 1W, you must wear laser protective eyewear. And no, a welders mask won't work...
I strongly recommend Eagle Pair Glasses.



In all, this is my first Class IV laser (sort of..), and my first time machining, and I think it turned out great. I would appreciate any tips or comments about the new laser!
Attached Thumbnails
DIY PLTB450B 450nm Laser Build-rsz_20140405_211714-1-.jpg   DIY PLTB450B 450nm Laser Build-rsz_20140405_211742-1-.jpg   DIY PLTB450B 450nm Laser Build-rsz_20140405_211809-1-.jpg   DIY PLTB450B 450nm Laser Build-rsz_20140405_212234-1-.jpg   DIY PLTB450B 450nm Laser Build-rsz_120140312_085706-1-.jpg  




Last edited by oahu99; 04-06-2014 at 03:16 AM. Reason: Grammar
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Old 04-06-2014, 03:32 AM #2
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Default Re: DIY PLTB450B 450nm Laser Build

Very nice! Glad you have a sense of safety when dealing with high powered lasers!
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Old 04-06-2014, 04:14 AM #3
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Default Re: DIY PLTB450B 450nm Laser Build

Cool little setup. One idea you could do (and something i have been meaning to do with a laser at some point) is get a trimpot wired in parallel with your other resistor(s) to have an adjustable power. Or maybe a switch to enable some other resistors, and have a high-medium-low, or whatever. Just a thought.

Also for the heatsink, you should have the top part of the module in the heatsink, it looks like you have it kinda halfway.
EDIT: Der, you do have the top part in the sink. My eyes work gudly

Last edited by crazyspaz; 04-06-2014 at 04:14 AM.
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Old 05-01-2014, 03:58 PM #4
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Default Re: DIY PLTB450B 450nm Laser Build

Interesting build, especially with the large heat sink. I like!
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