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Old 09-20-2011, 11:00 AM #1
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Question How hot should a 445nm Diode/heatsink get?

Hi there, I was wondering how hot a 445nm diode or the heat sink should get?

I have the mosquito module from rhd and I'm waiting on my guidesman host to come. I wanna know, how hot should the heat sink get safely before I have to let it cool?

The driver on the mosquito is at 1.7A I believe, DTR did a guidesman build at 1.5A and had a video of the power output over 6 minutes of continuous use, which sounds plenty and didn't seem to wreck his :P (obviously a bit less for mine because of the higher current).

So I would love to know how hot the heat sink should get before I let it have a cool ? A estimate temperature or "warm to touch" etc. would be great, as I know the rate my diode heats is likely to be differ from DTR's and I'm quite paranoid about wrecking my diode, haha.

(I had a go searching and didn't seem to find anything really specific on the current matter. So sorry if there already is.)

Thanks



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Old 09-20-2011, 11:27 AM #2
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Default Re: How hot should a 445nm Diode/heatsink get?

When it starts becoming warm to the touch then you probably should turn it off.

You also should try and stick to a 1 min on/1 min off duty cycle to conserve your battery and give your diode a longer life span.

As far as temperatures go, I would say, 50-60 degrees celcius max
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Old 09-21-2011, 11:21 AM #3
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Default Re: How hot should a 445nm Diode/heatsink get?

Oh, thats sweet as.

You again. You're so helpful haha

Thanks
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Old 09-21-2011, 11:30 AM #4
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Default Re: How hot should a 445nm Diode/heatsink get?

I try to be.
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Old 09-21-2011, 12:00 PM #5
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Default Re: How hot should a 445nm Diode/heatsink get?

It shouldn't get hot at all.... excessive heat will damage
a Laser Diode.

It is up to you to heatsink it as much as possible if you
are building a Laser.

As was mentioned above the general rule is... if you feel
the head of your Laser getting warm... Turn it off and let
it cool down before turning it on again.
This will ensure the longest possible life of your Laser..


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