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Old 09-16-2015, 07:37 PM #1
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Default Basic question for a n00b :/

Hi! I've got a 1W 445nm laser diode. I also bought 10mm G2 glass lense and screw everything inside Aixiz module. Actually, the laser is focused at approximately 1cm from the lens... I can't understand how to regulate the focal point at an higher distance. Please help!



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Old 09-18-2015, 07:04 PM #2
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Default Re: Basic question for a n00b :/

Just like this song https://search.yahoo.com/search?fr=m...in+move+it+out move it in move it out, but don't move it round or shake it up, just move it in move it out. Make sure you terminate the beam on a distant surface say 33 meters away. And watch how the spot size changes

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Old 09-18-2015, 07:12 PM #3
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Default Re: Basic question for a n00b :/

Ahahahahahahahah I'll try
Here's the lens:
http://www.amazon.com/405-G-2-Glass-.../dp/B00B6DOA0G
How can I focus to infinite?
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Old 09-19-2015, 01:04 AM #4
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Default Re: Basic question for a n00b :/

Quote:
Originally Posted by keyblade95 View Post
Ahahahahahahahah I'll try
Here's the lens:
http://www.amazon.com/405-G-2-Glass-.../dp/B00B6DOA0G
How can I focus to infinite?
Sure you can just move the lens in or out like I told you. However with such a short focal length the Rayleigh length will be short. I'll give a clue. When the spot size is as small as it can be on a distance surface then the beam is focused to infinity. This is also know as infinite conjugate.

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Old 09-19-2015, 07:43 AM #5
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Default Re: Basic question for a n00b :/

Thank you so much! I found the right distance removing the diode from the Aixiz module and moving the lens... but is it possible that I can't do that using Aixiz module? Screwing all in or all out in the module, the beam isn't focused.
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