Author Topic: Reflection from laser  (Read 4417 times)

John Henriksen

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Reflection from laser
« on: November 07, 2017, 01:11:29 PM »
Hi all

First thank you for this great forum  :)

I have just started using a laser EleksMaker® EL01-2500 445nm 2500mW Blue Laser

Now I would like to now how dangerous the reflektion light is.

I want to cut white paper for some x-mas deco, and I can see that it light the surrounding rum op.

I all ways use protection glasses (green).



 
John

EleksMaker® EL01-2500 445nm 2500mW Blue Laser

Software T2Laser

ThothLoki

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Re: Reflection from laser
« Reply #1 on: November 07, 2017, 02:32:10 PM »
The reflection will not burn you but it can blind you!

I would upgrade the glasses
Laser: A5 2000mw with L7 Board / A3 2500mw PWM with Mana SE -- All using T2Laser
3D Printer: Monoprice Maker Select v2.1
Image Resizer Applications (All OS): http://benboxlaser.us/index.php/topic,1434.msg17297.html#msg17297

nottingham82

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Re: Reflection from laser
« Reply #2 on: November 07, 2017, 02:32:19 PM »
our lasers have to use a focused beam like you see in the picture.  The reflection is not in focus and scatters.  There is still alot of energy hence it is bright... but its not that dangerous.
Laser: 2500mw A5 eleks maker
OS: Windows 10 all in one pc
Software: T2
http://www.gearbest.com/3d-printers-3d-printer-kits/pp_290386.html Paid $160 in 2016

ThothLoki

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Re: Reflection from laser
« Reply #3 on: November 07, 2017, 02:39:56 PM »
Nottingham, I agree. BUT even a diffused laser from a 2.5W laser is still pretty powerful. I have a green laser pointer that can reach an airplane is less than 5mw and that can blind someone.

All said and done, if you are unsure, treat everything as dangerous.
Laser: A5 2000mw with L7 Board / A3 2500mw PWM with Mana SE -- All using T2Laser
3D Printer: Monoprice Maker Select v2.1
Image Resizer Applications (All OS): http://benboxlaser.us/index.php/topic,1434.msg17297.html#msg17297

nottingham82

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Re: Reflection from laser
« Reply #4 on: November 07, 2017, 10:25:16 PM »
thats why I treat you like you are dangerous.... I saw a bumper sticker that said Loki Army.... You are spreading your influence over the world! I see through your plot!
Laser: 2500mw A5 eleks maker
OS: Windows 10 all in one pc
Software: T2
http://www.gearbest.com/3d-printers-3d-printer-kits/pp_290386.html Paid $160 in 2016

nottingham82

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Re: Reflection from laser
« Reply #5 on: November 07, 2017, 10:59:46 PM »
but in all seriousness I didnt mean it couldnt be damaging to your eyesight... just that its not gonna magically refocus and burn a hole in your arm due to a reflection.
Laser: 2500mw A5 eleks maker
OS: Windows 10 all in one pc
Software: T2
http://www.gearbest.com/3d-printers-3d-printer-kits/pp_290386.html Paid $160 in 2016

ROSS

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Re: Reflection from laser
« Reply #6 on: November 07, 2017, 11:59:50 PM »
Think most people will agree that Common sense dictates to wear safety glasses if you are in the same room as an operating laser that is uncaged or partially caged.   In other words...it's your eyes you need be careful of......
« Last Edit: November 08, 2017, 12:03:51 AM by ROSS »
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Lasers are wonderful machines..not ONLY  can they cut a finger off BUT  they can also cauterise it at the same time.....

SAFETY -  IS NO ACCIDENT

John Henriksen

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Re: Reflection from laser
« Reply #7 on: November 08, 2017, 03:49:58 AM »
Hi all

Thanks for answers

Should I put the laser in a cage, if so what is the preferred materials?



John

EleksMaker® EL01-2500 445nm 2500mW Blue Laser

Software T2Laser

ROSS

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Re: Reflection from laser
« Reply #8 on: November 08, 2017, 04:02:38 AM »
There are several examples on this forum....Plywood with clear acrylic top....or an orange acrylic top or totally enclosed with a camera looking at the workpiece inside.

A DIY  example as to what is possible is shown...
You MUST ensure the  acrylic used is ok for cutting out the damaging laser light.

( Its expensive!!):P   
 I reckon in the region of UK  GBP  £70+

You can save money by building it of Plywood/other material. and using  acrylic just for the lid.   The lid can also be of PLY with a window around 12 x 12  or whatever in it.
« Last Edit: November 08, 2017, 04:14:58 AM by ROSS »
.
Lasers are wonderful machines..not ONLY  can they cut a finger off BUT  they can also cauterise it at the same time.....

SAFETY -  IS NO ACCIDENT

ggallant571

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Re: Reflection from laser
« Reply #9 on: November 08, 2017, 06:23:35 AM »
Your machine appears to be a core-xy. Are you speeds correct? If so, what params did you use to build the firmware?
SARCASM - Just one more service we offer here.

ThothLoki

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Re: Reflection from laser
« Reply #10 on: November 08, 2017, 06:37:24 AM »
I have used a cardboard box with an exhaust fan cut into it
I have also grabbed foam board from a dollar store and built a box with a window

Laser: A5 2000mw with L7 Board / A3 2500mw PWM with Mana SE -- All using T2Laser
3D Printer: Monoprice Maker Select v2.1
Image Resizer Applications (All OS): http://benboxlaser.us/index.php/topic,1434.msg17297.html#msg17297

ROSS

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Re: Reflection from laser
« Reply #11 on: November 08, 2017, 06:46:05 AM »
I have used a cardboard box with an exhaust fan cut into it
I have also grabbed foam board from a dollar store and built a box with a window


Yep..just use your imagination and make sure its safe......

Here are a couple more to show what is possible....  (NOT mine by the way!)
« Last Edit: November 08, 2017, 06:50:52 AM by ROSS »
.
Lasers are wonderful machines..not ONLY  can they cut a finger off BUT  they can also cauterise it at the same time.....

SAFETY -  IS NO ACCIDENT

John Henriksen

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Re: Reflection from laser
« Reply #12 on: November 08, 2017, 07:10:43 AM »
Hi

Thanks for the many good suggestions , I will make a box for the laser  8)
John

EleksMaker® EL01-2500 445nm 2500mW Blue Laser

Software T2Laser

John Henriksen

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Re: Reflection from laser
« Reply #13 on: November 08, 2017, 11:58:38 AM »

I just saw this website

https://jtechphotonics.com/?product=445nm-laser-shielding

Is this any good, and how do I get it to Denmark?

John

EleksMaker® EL01-2500 445nm 2500mW Blue Laser

Software T2Laser

ROSS

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Re: Reflection from laser
« Reply #14 on: November 08, 2017, 12:19:26 PM »
Check plastic (acrylic) suppliers in Europe particularly you own area.  They should have ORAMGE  which appears to be the best for BLUE lasers.....Ensure the OD is =4 or above.
.
Lasers are wonderful machines..not ONLY  can they cut a finger off BUT  they can also cauterise it at the same time.....

SAFETY -  IS NO ACCIDENT