Old 09-19-2010, 06:28 AM #1
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Default A140 under glass?

What would be the pitfalls of making a >1W 445 build in a waterproof host but have the stock (ar coated) glass left in?
I'm guessing reduced output, reflection back into the diode, possibly too much temp differential in the glass itself might even crack it.
Any thoughts on this?
Tried searching it for a while but no joy.

This host with a heatsink might be an idea with a low duty cycle
http://cgi.ebay.com/XTAR-Waterproof-...item230a264edf
But I would likely use a larger "headed" host for better runtimes


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Old 09-19-2010, 06:38 AM #2
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Default Re: A140 under glass?

Quote:
Originally Posted by AUTO XX View Post
What would be the pitfalls of making a >1W 445 build in a waterproof host but have the stock (ar coated) glass left in?
I'm guessing reduced output, reflection back into the diode, possibly too much temp differential in the glass itself might even crack it.
Any thoughts on this?
Tried searching it for a while but no joy.

This host with a heatsink might be an idea with a low duty cycle
XTAR Waterproof 18650 CREE Q5 LED Flashlight Torch B01 - eBay (item 150494138079 end time Sep-22-10 19:32:10 PDT)
But I would likely use a larger "headed" host for better runtimes
I think you are over-estimating the power of ~1W.
It's not even close to enough to crack glass.

Depending on the coating, thickness, and quality of the glass, you will lose between 3-8% of your power. Reflection in this case should not cause any problems.

Go for it. Build the laser and report your findings.
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Old 09-19-2010, 06:41 AM #3
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Default Re: A140 under glass?

Sound promising, orders for hosts (3) have been sent ^_^
Now the tedious monotony of waiting on Hongkong postal workers begins
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2 - 5mW pointer

1 - "5mW" pen *overspec*
2 - 200mW "DX" pens
5 - 1W 808nm labbies (soon to have custom hosts)
3 - 1.6W 445 handheld in a professional home DIY host - 2 Sold
3 - "5mW" Ebay pens - 1 >30mW
1 - ~600mW 405 in a handmade heatsink + SS Cree host
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