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FrozenGate by Avery

Focusing or collimating ?

Externet

New member
Joined
May 21, 2022
Messages
13
Points
3
Good day. First post with lots to learn.
How to produce a ~3mm dot at 6 metres (1/8" at 20') with a 405nm module like this 12.2mm diametre, ~46mm long module that has some lensing on it. With its lens all the way in, the beam still diverges.
1653159493925.png
Do I need a housing with lens or collimator or both or other ? Would it fit in a '301' , '303' common pointer housing to use the lenses in it ?
 





That lens is not the same thread size as 303etc. It is, however, the same thread size as g2, g8, 3E and others. That looks like a standared 12mm module that will fit a variety of hosts. As for 1/8" at 20' that may be a tall order. Perhaps someone else has some ideas.
 


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