Focusing a 1 Watt Blue Laser Diode

[QuantaBoy]

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?

 

[TacoHerder]

what type of lens are you using now?

 

[QuantaBoy]

Not sure. It is the lens that was built into the diode as received from the manufacturer. No info supplied on that.

 

[TacoHerder]

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.

 

[Tech_Junkie]

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?

 

[DTR]

If it is a 445 diode check out this thread.

http://laserpointerforums.com/f65/there-something-wrong-my-beam-spot-59400.html

 

[QuantaBoy]

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

 

[DTR]

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

 

[Tech_Junkie]

Input voltage 12VDC? :thinking:

Can you post a link?

 

[QuantaBoy]

Thanks for your help, appreciated.