Cheap Eye Safety for Burning

I saw some posts a while ago about cheap eye safety covering sunglasses and different green films and stuff.I agree that eye safety is not something to be taken lightly, it's very important, but when you really can't get goggles and still want to burn stuff with the diy dvd laser there's something that helps, and it's right on the sled(at least mine had it )
This little piece of glass almost completely reflects red light when shone at at an angle of 45 degrees.It's quite small but if you keep it close to your eye it will act like safety goggles.It passes all other wavelengths very well so there is no danger of your pupils getting too dilated like with sunglasses.The red dot becomes very very dim.Bellow is a picture of it , and the sled.I marked where it used to be with green and where the diodes used to be with red.I thing no.1 was the red one, but I can't really remember.

I know it can't replace goggles, you can't wear it and won't protect you in case of an accident, but it's still useful to stare at the object you're buning without exposing your eyes to too much red light.

Flat piece of optics glass at a high angle? Sounds like a brewster window to me. Reflecting some but not all red means it's probably passing light in a specific polarization.

FrothyChimp said:

Flat piece of optics glass at a high angle? Sounds like a brewster window to  me. Reflecting some but not all red means it's probably passing light in a specific polarization.

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So do all DVD sleds have something like this?

That I cannot tell you but it would make sense that reading a disc (the light/dark areas) would be easier if your light were polarized. Tells you how often I tear apart DVD players.

The output of a diode laser is already polarized, no need to add additional polarizers or work with brewster windows (as you would on a gas laser).

If you want elcheapo protection from red, you could use one of those 3d glasses but with 'green' lenses for both eyes. They actually do a very good job at blocking 630+ and 532 for the green and red films respectively.

So your making a "safety monocle"? Thats pretty cool, especially if you could find a way to mount it in front of your eye.

iewed said:

So your making a "safety monocle"? Thats pretty cool, especially if you could find a way to mount it in front of your eye.

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Yea kinda, I mounted the thing in the circular thingy with a hole you see in my photo and I'm gonna find some old sunglasses to make a hole in front of my eye and screw that thing so I can look directly through it.The rest of the sunglass lens and the other lens I will just cover with tape to avoid reflections.

I don't know about the 3D glasses , there was a whole discution about that and how they block too much of the rest of the spectrum and make your pupil dilate, but I don't know , I never tried'em.This thing lets in light with no problem...you can even see red, and can see the red leds on my charger, I think it only blocks a very narrow band of wavelengths.

I recently took apart a cd player and i found similar pieces of this glass. there are 2 of them i was wondering if they are the same? it kinda has a rainbowish tint when you look at it from different angles.

jakeizbeast said:

I recently took apart a cd player and i found similar pieces of this glass. there are 2 of them i was wondering if they are the same? it kinda has a rainbowish tint when you look at it from different angles.

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Just shine your laser at it with a 45[sup]o[/sup] angle and see if it goes through or if it gets reflected.

Some goes threw some reflects

jakeizbeast said:

Some goes threw some reflects

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That's not what you're looking for then....

would 1 way glass offer some protection ?

diachi said:

would 1 way glass offer some protection ?

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I don't think sne way glass pretty much reflects everything, but I somehow I still think that at least some of the light from a highpower laser would pass through...

kl kl good to know (theres no where i could get one way glass, but none the less)

if you make it like monocle then you will look like this guy ;D ;D ;D