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- Feb 5, 2008
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Hi peoples,
Heatsinks I am talking about can and must be purchased here :
Cooling Heatsink/Heat Sink for 12mm Laser Diode Module - eBay (item 120600437345 end time Nov-22-10 07:55:04 PST)
Now, what do they looks like :
Link to very big picture:
http://i690.photobucket.com/albums/vv263/Eudaimonium/PA150368.jpg
Anyhow, I have used them to keep my two red modules, that will go into my scanner, cold enough to survive endless torture I am about to put them through.
I have connected two reds in series and shot 415 mA through them first with a couple of batteries:
However, since that's not going to do, I have disconnected the computer PSU from the correction amplifier board and powered the thing with 12V so I don't have to worry about batteries. To reduce the LM350 dissipation, I added a green module too:
This setup as you see it was run for about 4 minutes straight one time.
Reds got only so warm that you can feel it's warm. Few °C less and you couldn't even tell the difference between pre-ON time and post-ON time. And that's with none airflow at all! Well, minimal, neglectable one.
Outside machining is decent, surface could be smoother but who cares, actually.
Inside, where 12mm module goes, is very smooth and provides maximum heat transfer, and machined with very low tolerance. Too bad Aixiz does not make their modules with low tolerance, forcing me to use small bit of aluminium foil in one of the heatsinks, other one fit just fine.
However, there are two main problems I'd point out here.
First, height of the module.
It's about 5 mm lower than "standard" height for labby modules, for example black Aixiz 50 mW brick. Hence, they need to be elevated to match the O-like dichroic mounts and Aixiz beam height.
Second, assembly.
In heatsinks themselves, holes are not threaded. You mount them together with a screw and a nut on other side, which means you have to hold the heatsink together, then grab hold the nut with something and in same time drive the screw from other side. Quite a task. I'd prefer the nuts to be glued (or welded, why the hell not) to the main body of the heatsink.
Pros:
- good heatsinking power
- large surface to air
- low tolerance machining, e.a. finish on the 12mm hole
Cons:
- nonstandard fitted module height
- assembly style
Considering the price, free shipping and all, overall experience is GOOD and I warmly reccomend those if you need them.
Heatsinks I am talking about can and must be purchased here :
Cooling Heatsink/Heat Sink for 12mm Laser Diode Module - eBay (item 120600437345 end time Nov-22-10 07:55:04 PST)
Now, what do they looks like :
![PA150367.jpg](http://i690.photobucket.com/albums/vv263/Eudaimonium/PA150367.jpg)
Link to very big picture:
http://i690.photobucket.com/albums/vv263/Eudaimonium/PA150368.jpg
Anyhow, I have used them to keep my two red modules, that will go into my scanner, cold enough to survive endless torture I am about to put them through.
I have connected two reds in series and shot 415 mA through them first with a couple of batteries:
![PB070385.jpg](http://i690.photobucket.com/albums/vv263/Eudaimonium/PB070385.jpg)
![PB070383.jpg](http://i690.photobucket.com/albums/vv263/Eudaimonium/PB070383.jpg)
However, since that's not going to do, I have disconnected the computer PSU from the correction amplifier board and powered the thing with 12V so I don't have to worry about batteries. To reduce the LM350 dissipation, I added a green module too:
![PB070389.jpg](http://i690.photobucket.com/albums/vv263/Eudaimonium/PB070389.jpg)
This setup as you see it was run for about 4 minutes straight one time.
Reds got only so warm that you can feel it's warm. Few °C less and you couldn't even tell the difference between pre-ON time and post-ON time. And that's with none airflow at all! Well, minimal, neglectable one.
Outside machining is decent, surface could be smoother but who cares, actually.
Inside, where 12mm module goes, is very smooth and provides maximum heat transfer, and machined with very low tolerance. Too bad Aixiz does not make their modules with low tolerance, forcing me to use small bit of aluminium foil in one of the heatsinks, other one fit just fine.
However, there are two main problems I'd point out here.
First, height of the module.
It's about 5 mm lower than "standard" height for labby modules, for example black Aixiz 50 mW brick. Hence, they need to be elevated to match the O-like dichroic mounts and Aixiz beam height.
Second, assembly.
In heatsinks themselves, holes are not threaded. You mount them together with a screw and a nut on other side, which means you have to hold the heatsink together, then grab hold the nut with something and in same time drive the screw from other side. Quite a task. I'd prefer the nuts to be glued (or welded, why the hell not) to the main body of the heatsink.
Pros:
- good heatsinking power
- large surface to air
- low tolerance machining, e.a. finish on the 12mm hole
Cons:
- nonstandard fitted module height
- assembly style
Considering the price, free shipping and all, overall experience is GOOD and I warmly reccomend those if you need them.