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Old 05-01-2012, 07:21 AM #1
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Default Focusing a 1 Watt Blue Laser Diode

Hi All,

I have just built a 1 Watt blue laser, however, I am not happy with the resultant beam. The beam is approximately 1mm wide x 5mm high. I want to focus this down to less than 1mm square. What lens do I require for this?



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Old 05-01-2012, 07:21 AM #2
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Default Re: Focusing a 1 Watt Blue Laser Diode

what type of lens are you using now?
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Old 05-01-2012, 07:23 AM #3
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Default Re: Focusing a 1 Watt Blue Laser Diode

Not sure. It is the lens that was built into the diode as received from the manufacturer. No info supplied on that.
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Old 05-01-2012, 07:27 AM #4
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Default Re: Focusing a 1 Watt Blue Laser Diode

The 445nm diodes have a rectangular looking beam, even when focused tight. 405nm however can get very small to a pen point almost.The lens you received may not be glass. Where did you buy your laser? If you dont mind me asking.
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Old 05-01-2012, 07:43 AM #5
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Default Re: Focusing a 1 Watt Blue Laser Diode

Some more info and pictures would help.

Did you use a AiXiz module for the build?

If not, is it pressed into the heat sink?

Did you make or buy the heat sink?

What is holding the lens you are using now?
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Old 05-01-2012, 07:53 AM #6
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Default Re: Focusing a 1 Watt Blue Laser Diode

If it is a 445 diode check out this thread.

There is Something "Wrong" With My Beam/Spot

Last edited by DTR; 05-01-2012 at 07:56 AM.
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Old 05-01-2012, 07:56 AM #7
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Default Re: Focusing a 1 Watt Blue Laser Diode

I bought it on Ebay, from O-like shop. these are the specs:


Part No OL-445-1W
Wavelength 445-450nm
Output Power >800mW
Input Voltage 12VDC
Input Current 2A
Operating Temperature 0℃-30℃
Working Mode 0-20KHZ
Divergence <3.0mrad
Lens Material Glass
Operating Lifetime >5000Hrs
Wire long 300mm
Size laser module :66x33x33 mm
power supply :68x43.50x36mm
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Old 05-01-2012, 07:56 AM #8
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Default Re: Focusing a 1 Watt Blue Laser Diode

Here is about as good as you can expect the line to look like on a 445 @ 30 feet in a portable host

The item in my hand is a AAA battery for scale.

405-G-1/2





And 445 Aixiz Three Element Glass
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Old 05-01-2012, 07:59 AM #9
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Default Re: Focusing a 1 Watt Blue Laser Diode

Input voltage 12VDC?

Can you post a link?
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Old 05-01-2012, 11:49 AM #10
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Default Re: Focusing a 1 Watt Blue Laser Diode

Thanks for your help, appreciated.
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