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Beam dump/beam blocker advice needed

VLC18

Member
Joined
Sep 7, 2021
Messages
32
Points
8
First if all I would like it to be known that I am new to lasers. In fact I don’t even have one over 5 mw yet. I want to get 3 lasers from San wu pocket series. The 492nm 100 mw,520nm 150 mw, and the 445nm 500 mw laser. I want to get something to act as a “beam blocker”. I know they may not be necessary but I still might want them for the future. If all goes well with these I may purchase lasers if higher power. Just wondering what I should use so I can leave it in one place for burning purposes.

thanks in advance😁👍
 



RedCowboy

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Jul 10, 2015
Messages
10,851
Points
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I use cinder blocks and bricks which I can burn with enough power but they will stop the beam, for anything sanwu sells a brick or cinder block works just fine but you also want laser safety glasses that will attenuate the wavelength you will be working with, you must protect your eyes, accidents happen so be prepared by wearing the correct laser safety glasses.

A trick I use is to set my cinder block at an angle so my eyes won't be in line with the diffuse reflection from the termination either.
 

VLC18

Member
Joined
Sep 7, 2021
Messages
32
Points
8
I use cinder blocks and bricks which I can burn with enough power but they will stop the beam, for anything sanwu sells a brick or cinder block works just fine but you also want laser safety glasses that will attenuate the wavelength you will be working with, you must protect your eyes, accidents happen so be prepared by wearing the correct laser safety glasses.

A trick I use is to set my cinder block at an angle so my eyes won't be in line with the diffuse reflection from the termination either.
Thanks so much I heard that painting things black make it better because it absorbs light.is this nessesary?
 

RedCowboy

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Jul 10, 2015
Messages
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Points
113
For infinity focused beams you could use high temp black paint on a piece of aluminum or better yet use some extruded aluminum heat sink and paint it with flat black high temp paint and build a box painted black on the inside to absorb the diffuse reflections then put your cinder block or painted heat sink inside to stop the beam, make a small hole in your box for your laser to enter, I have done this with PVC tubes painted flat black inside ( not gloss ) and butted up to a cinder block to block the diffuse reflection and the black paint to absorb the scattered light from the diffuse reflection. Be aware of anything that can catch fire.

The cinder block set at an angle works well for a quick beam stop and to hide the diffuse reflection ( scattered light ) from the termination while working on the bench.

SANY6125.JPG
 




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