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Line Lens Angle question

Achayan

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Feb 3, 2021
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Hi,
Newbie here. Tried google but no clear cut info.
I am planning to buy a small laser 5mW or less for a circular centering device. But the laser shouldn't be in the circular area, only on the sides. I am going to buy 2 line Lasers so that I get a cross line in the center of the circle. While browsing ,I found that they used " Line Lens Angle:120 Degrees Default ( also have 30,45,60 and 90 degrees line lens)"
My question is what does all these angles do? Shorter beam length as it goes from 120 to 30? Same as in our protractor? Can anyone provide a picture of the different angles?
Thanks
 



ArcticDude

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Jun 22, 2016
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Hi,
Newbie here. Tried google but no clear cut info.
I am planning to buy a small laser 5mW or less for a circular centering device. But the laser shouldn't be in the circular area, only on the sides. I am going to buy 2 line Lasers so that I get a cross line in the center of the circle. While browsing ,I found that they used " Line Lens Angle:120 Degrees Default ( also have 30,45,60 and 90 degrees line lens)"
My question is what does all these angles do? Shorter beam length as it goes from 120 to 30? Same as in our protractor? Can anyone provide a picture of the different angles?
Thanks


Just look for alignment lasers, they come wide range of projections – Dot, Cross, Line, Line+Dot


If you need circle it can be done via diffraction grating

EDIT
Moving thread to "General" sub-forum
 
Last edited:

Encap

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Fan Angle: The fan angle is the angular spread of the laser beam by the line lens.
The smaller the angle "0" the shorter the line "X" produced at a given distance from the laser output to the target.

laser-la-2 75.jpg
 
Last edited:

hakzaw1

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you do not need two lasers to get a 'cross' (unless you need two wave lenghts. AixiZ (dotcom) Lasers sells both
 

Achayan

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Heard that he is really good I did go on their (AixiZ) website as well as their Amazon link... But so far (1 week) no response to my questions. Tried calling, but it seems to be a fax line.
The reason for 2 Lasers to get a cross is that I am not putting the laser on the center of the circle ( ring) but on the sides ( top and side). So I will using a line laser and where both lines meet would be the center of the circle ( cross).
 
Last edited:

Achayan

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Feb 3, 2021
Messages
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Points
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I am planning on putting a line Laser on 1 and 2 without blocking the center of the ring. Where the 2 line Lasers meet (cross) would be my center.
ring.jpg
 




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