zog
Posts: 200
Joined: Sun Nov 20, 2011 5:43 pm
Contact: Website

Dangerous laser on fabscan

Sun May 22, 2016 2:50 pm

Hi,
If any of you have built a fabscan as featured in the magpi it may be using a class IIIa laser line. See the wikipedia link I have pasted below.

https://en.wikipedia.org/wiki/Laser_safety

I recommend that your replace the laser if it is unsuitable with an inherently safe class 1 laser immediately.

Instructions to do so can be found below.

https://groups.google.com/forum/?hl=en# ... XhXlt2KYn4

Safe scanning


Jack Taylor

Pithagoros
Posts: 580
Joined: Wed Nov 12, 2014 8:16 pm

Re: Dangerous laser on fabscan

Sun May 22, 2016 5:59 pm

5mW is just the same power that people use in lectures and presentations, probably not something I'd let young kids mess with but not going to be a problem especially confined in a scanning box. I'm not even sure a lower power laser would have the brightness needed to make this project work.

zog
Posts: 200
Joined: Sun Nov 20, 2011 5:43 pm
Contact: Website

Re: Dangerous laser on fabscan

Sun May 22, 2016 6:50 pm

I think the problem is that you can focus the particular laser I am worried about, and I wouldn't put it past someone to try and scan a shiny silver statue and to get the laser light reflected in their eye. If the scanner needs a class IIIa laser then it needs to go inside a light tight box. The current fabscan is an open box, although I believe a new enclosed model is being worked on.

I have a colleague at work who has a blind spot in one eye because an idiot shone a laser pointer in her eye when she was at school. Some of the laser pointers on the market are dangerous and shouldn't be sold as such.

I know I am captain safety, but the laser does have class IIIa stamped on it for a reason!

User avatar
liz
Raspberry Pi Foundation Employee & Forum Moderator
Raspberry Pi Foundation Employee & Forum Moderator
Posts: 5202
Joined: Thu Jul 28, 2011 7:22 pm
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Re: Dangerous laser on fabscan

Sun May 22, 2016 10:45 pm

Closing duplicate thread.

You can put eyes out with a fork, too; and soldering irons can cause burns. We expect people to use a degree of common sense, and we are firm believers that you don't learn much if wrapped up in too much cotton wool.
Director of Communications, Raspberry Pi

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