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FrozenGate by Avery

Homemade goggles? will this work?

  • Thread starter Thread starter primary.Sequence
  • Start date Start date
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primary.Sequence

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I was searching for a cheap pair of goggle to block 405 and 532 nm for my <30mW green and <100mW bluray laser
and I came across this on youtube:

http://www.youtube.com/watch?v=8v_kLnGR6CA
It uses theatrical lighting gel which blocks the green to violet end of the spectrum.

do you guys think these plastic sheets will be enough for indirect exposure (diffusive reflection)?
I don't plan on burning anything, but I still want some protection indoors.  8-)

Also, since I won't be burning anything (got my lasers for the beam at night), when else should I be wearing them? I still want to see the beams . . .  :-/
 





primary.Sequence said:
I was searching for a cheap pair of goggle to block 405 and 532 nm for my <30mW green and <100mW bluray laser
and I came across this on youtube:

http://www.youtube.com/watch?v=8v_kLnGR6CA
It uses theatrical lighting gel which blocks the green to violet end of the spectrum.

do you guys think these plastic sheets will be enough for indirect exposure (diffusive reflection)?
I don't plan on burning anything, but I still want some protection indoors.  8-)

Also, since I won't be burning anything (got my lasers for the beam at night), when else should I be wearing them? I still want to see the beams . . .  :-/
Click to expand...


Hey primary.Sequence...
                                   you've been here on LPF for 15 days....
Here is the Primary Sequence...

1) New members should read the New Members stickies...
2) New members should read threads related to their questions first...
3) New members should first use the [Search] Button to find answers....
4) Only after exhaustive searches (incase the question has already been asked
   and answered 100 times before) should you ask your question...

This way you won't look like a noob.... ;)

I'll give you a hint... Buy approved Safety Goggles....


Jerry
 
sorry guys, i just found it on the 4th page  :-[

BTW Day, if you don't mind, can you tell me where I can find a pair of real goggles for $19 ?

and finally, are there any actual instances where people have bleached through these gels at <100mW ?
 
primary.Sequence said:
and finally, are there any actual instances where people have bleached through these gels at <100mW ?
Click to expand...

It only takes one hit...

For indirect exposure, you could get by with red laser enhancement goggles, but one hit and you're blind. :'(
 
primary.Sequence said:
BTW Day, if you don't mind, can you tell me where I can find a pair of real goggles for $19 ?
Click to expand...

Hi primary.Sequence,

you way want to try > those guys <, they tend to be pretty cheap and quite extensive. To see the beam you'd need alignment goggles.

However, $19 is probably too low. I'd imagine at least 3 time this amount...

But you can't take your vision lightly. Follow lasersbee's advice and don't give yourself an opportunity to be sorry.
 
primary.Sequence said:
sorry guys, i just found it on the 4th page *:-[

BTW Day, if you don't mind, can you tell me where I can find a pair of real goggles for $19 ?

and finally, are there any actual instances where people have bleached through these gels at <100mW ?
Click to expand...

You can't... just get a certified pair for 48 dollars and cease to worry.

Link is here click: OEM hobby goggles

This topic comes up once it week it seems FYI Primary sequence. Same answer every time same old debates. The gel question has a complex answer in short some of the laser light gets through the gel it isn't good enough protection. Buy from a real company there are others that make certified goggles but OEM is the least expensive as far as I know.
 
Last edited:
laser83 said:
OEM is the least expensive as far as I know.
Click to expand...
Thanks for posting the link, they look good.

Just a note that the googles they sell for 532 nm (green) lasers appear to be transparent to IR, so if your green laser lacks an IR filter it MIGHT be more dangerous to wear the goggles while using that laser than not wearing the goggles at all.

Something to be aware of.
 
Warske said:
Thanks for posting the link, they look good.

Just a note that the googles they sell for 532 nm (green) lasers appear to be transparent to IR, so if your green laser lacks an IR filter it MIGHT be more dangerous to wear the goggles while using that laser than not wearing the goggles at all.

Something to be aware of.
Click to expand...

I'm fed up hearing about this IR danger.

The IR is not dangerous , in most cases it does not exceed 5-10% of the actual green output power. The green portion of the light is MUCH more dangerous and that is the part that you should be worried about.

Regards,

Adam
 
diachi said:
The IR is not dangerous , in most cases it does not exceed 5-10% of the actual green output power.
Click to expand...
Most cases? I measured 22% on one of mine. Others have reported a similar percentage. It does depend on the laser. If you have data to back up your statement I would be interested.

The green portion of the light is MUCH more dangerous and that is the part that you should be worried about.
Click to expand...
That is incorrect when you are wearing goggles that block only the green. In that case the green is blocked and is not dangerous to you. The IR is NOT blocked and may be very dangerous. Again, it depends on the laser.

The other interesting issue is that this IR can be very well collimated, which is something I haven't seen discussed on this forum before.

There is a more full discussion of this if you are interested:
http://laserpointerforums.com/laser...m/showthread.php?p=521159&posted=1#post521159

As I said: "the goggles they sell for 532 nm (green) lasers appear to be transparent to IR, so if your green laser lacks an IR filter it MIGHT be more dangerous to wear the goggles while using that laser than not wearing the goggles at all."
 
Hollyyyy .... Just metered my L-C030 . 6mW Ir and 22mW green = 21% IR :O But still it's only just above the safe level for the IR, so I'm still not worried about it.
 
If you're referring to the magical 5mW limit... that's considered safe if you have a blink reflex, which for IR you haven't.
 
Even though you wouldn't blink. Your hardly going to sit with your goggles on looking into the laser for very long.

Adam
 
Come on guys, 6mW of IR are not going to give him any damage. IR is not focused (not as the green), this means even if you get a direct hit you are not getting the full 6mW inside. In any other case (reflections, etc) the IR is even less focused so no need to worry.

Honestly, get a green googles and forget about IR, wich is not a problem on lasers under 100mW.
 
just remember that you only have two eyes do you realy want to trust them to something that costs less than $10.00, how much did you pay for that laser !

Peace


Pyro...
 
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