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I just remembered, that was the laser that I was going to buy of you. I remember that picture. Such a large laser head.
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I just remembered, that was the laser that I was going to buy of you. I remember that picture. Such a large laser head.
What is a mm on laser? How can I understand what mm is mine? So is a 3 mm brighter than 5 mm?
:banghead:
A millimeter(mm) is a mm ?
They are talking about the diameter of the beam. You can see the difference in the pictures.
Get a metric system ruler and measure the diameter.
At same output power a 3mm is brighter than a 5mm. It is called power density---milliwatts per cm squared.