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Safety glasses not enough + beam quality

RickyRoesay

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I recently purchased an NUBM08 450nm diode pressed into a 12mm module from DTR laser. Also got a complementary ACS5500BU driver pushing 4 amps into the module. I have experience with electronics and making things but this is my first laser and I am a little scared of its power (should have gotten a lower power laser diode!).

I purchased a set of "Eagle Pair" safety goggles, OD6 190nm-540nm but when I shoot my laser at wood it still really hurts to look at it. I know wood is slightly reflective but I feel like that's a reasonable thing to shoot at with a burning laser (or not? Styropyro may be a bad benchmark).

TLDR:
Why does it hurt to look at the laser's dot/reflection on wood and other things, is OD6 not nearly enough for a laser of this power? (4-5 ish watts).


PS: its got the G8 M9x0.5 threaded lens but the beam quality leaves something to be desired. Is it the diode, lens, or just my expectations? leaves ~0.5 cm squared cube 10 feet away at best.
 



gazer101

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I recently purchased an NUBM08 450nm diode pressed into a 12mm module from DTR laser. Also got a complementary ACS5500BU driver pushing 4 amps into the module. I have experience with electronics and making things but this is my first laser and I am a little scared of its power (should have gotten a lower power laser diode!).

I purchased a set of "Eagle Pair" safety goggles, OD6 190nm-540nm but when I shoot my laser at wood it still really hurts to look at it. I know wood is slightly reflective but I feel like that's a reasonable thing to shoot at with a burning laser (or not? Styropyro may be a bad benchmark).

TLDR:
Why does it hurt to look at the laser's dot/reflection on wood and other things, is OD6 not nearly enough for a laser of this power? (4-5 ish watts).


PS: its got the G8 M9x0.5 threaded lens but the beam quality leaves something to be desired. Is it the diode, lens, or just my expectations? leaves ~0.5 cm squared cube 10 feet away at best.
I just wear a VR headset with a camera in front... No amount of laser power could possibly hurt me that way (unless it melts through my aluminum-back-plated internal LCD screen)
 

RickyRoesay

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I just wear a VR headset with a camera in front... No amount of laser power could possibly hurt me that way (unless it melts through my aluminum-back-plated internal LCD screen)
I appreciate the reply, but ideally I wouldn't to have to put on a VR headset on to use my laser. I do have the rift CV1 but want my glasses to work as intended. Have you had any experiences with overly bright reflections? Maybe its a bad pair
 

gazer101

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I appreciate the reply, but ideally I wouldn't to have to put on a VR headset on to use my laser. I do have the rift CV1 but want my glasses to work as intended. Have you had any experiences with overly bright reflections? Maybe its a bad pair
Eagle Pair is very reliable usually, but we can't rule out the possibility of it being a bad pair. See if you can get a refund to buy another pair
 

Lifetime17

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Hi,
Regarding your 08 diode, its a multi mode diode and they have a long bar appearance . They only way to get close to a dot is to use a 3E lens and a 6X cylindrical lenses. So with the G8 lens it will clip the ends a bit but not enough, be happy with it .
Rich:)
 

GSS

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Have to ask if you bought the Eagles at a reputable place like Survival Lasers?
Describe hurt your eyes? Uncomfy or pain.
Legit OD5 and OD6 Eagles can be bought with a 50% VLT. This helps you see the burning spot a little better than the usual 30% to 35% which you barely see a spot.
Alot of cheap ebay glasses use very dark lenses that are around the 25% to 30% VLT to try and help block a accidental laser strike. Doesn't mean they work though.
I have Eagles with the 50% visible light transmission and yes its a bit brighter looking at the spot, and I would say it's more tiring on the eyes than hurting.
If your Eagles are legit, they will protect you from a accidental strike regardless of what you see when your burning.
 

RickyRoesay

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Have to ask if you bought the Eagles at a reputable place like Survival Lasers?
Describe hurt your eyes? Uncomfy or pain.
Legit OD5 and OD6 Eagles can be bought with a 50% VLT. This helps you see the burning spot a little better than the usual 30% to 35% which you barely see a spot.
Alot of cheap ebay glasses use very dark lenses that are around the 25% to 30% VLT to try and help block a accidental laser strike. Doesn't mean they work though.
I have Eagles with the 50% visible light transmission and yes its a bit brighter looking at the spot, and I would say it's more tiring on the eyes than hurting.
If your Eagles are legit, they will protect you from a accidental strike regardless of what you see when your burning.
I did buy them from survival laser USA. It's kinda uncomfortable but definitely bordering on painful/spots in my eyes at times, at least with wood and white painted walls. It's not in an enclosure yet so I'm not even running it that long at all. Do you think I should just stick with darker things to shoot at? I suppose it is nice to be able to see the dot on the wall clearly, should I just be expecting a little pain and discomfort shooting at certain things? Hate to be a nervous Nellie but I just want to make sure I'm being safe with this laser.
 

RickyRoesay

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Hi,
Regarding your 08 diode, its a multi mode diode and they have a long bar appearance . They only way to get close to a dot is to use a 3E lens and a 6X cylindrical lenses. So with the G8 lens it will clip the ends a bit but not enough, be happy with it .
Rich:)
I figured so, it's got potential for a very small form factor, and it's only one small lens so I will work with what I have already. Thanks Rich!
 

Snecho

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This is very strange. I don't have a 5W laser, but I have a 1.5W blue and when looking through my OD5 glasses, the spot is laughably dim.
 

GSS

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This is very strange. I don't have a 5W laser, but I have a 1.5W blue and when looking through my OD5 glasses, the spot is laughably dim.
Yup, it intensify's as the wattage increases, to me anyway's.
Looking at a spot on the wall with a 1W green laser "without" glasses is extremely more tiring than a 5W or 7W blue spot "with" glasses.
I assume these 50% VTL glasses were made by Eagle for the purpose to see the burning spot better. It's much safer because some might tend to lift the darker glasses off their eyes, just very temporary to see what they are burning better and in that split second anything can happen.
People have different sensitivity with their eye's. Your not a nervous Nellie Ricky, just looking out.
You said you have the OD6 pair? Are those the slip over types and do you wear regular glasses?
You can always do a very quick pass through test on the side lens part of the glasses.
 
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RickyRoesay

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Yup, it intensify's as the wattage increases, to me anyway's.
Looking at a spot on the wall with a 1W green laser "without" glasses is more tiring than a 5W or 7W blue spot "with" glasses.
I assume these 50% VTL glasses were made by Eagle for the purpose to see the burning spot better. It's much safer because some might tend to lift the darker glasses off their eyes, just very temporary to see what they are burning better and in that split second anything can happen.
People have different sensitivity with their eye's. Your not a nervous Nellie Ricky, just looking out.
You said you have the OD6 pair? Are those the slip over types and do you wear regular glasses?
You can always do a very quick pass through test on the side lens part of the glasses.
It says OD6 on them but they don't have very large sidewalls or anything if that's what you mean. There are more sidewalls than your typical auto shop ppe but not slip over glasses. Kinda not trying to point it at or near my face in any way, if your suggesting. I think my game plan is to just shoot it at things further away, and find some good things to aim at that aren't bright white. My eyes are kinda sensitive though, to the point where I view PDF's in foxit reader with black background and white text, is there a way to buy reliable glasses that hide the beam a little better? Like a different VLT rating? If not, I can find better things to aim at.
 

GSS

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No No No No No!!! Not at your face when wearing themo_O
With them on a table and a quick laser test to see if the laser light passes through and you can see a spot on the wall or any backstop..
Are these the glasses?
 

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RickyRoesay

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I suggest these then.. with having sensitive eyes..
The glasses I got were these shown below20200323_160156.jpg
These are my only pair, and I am definitely going to just go ahead and try the other pair of goggles you recommended. Thank you for all your help!
 
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paul1598419

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Those laser goggles are fine. You should have no problems with them When looking at diffuse reflections keep in mind that the intensity falls off as the square of the distance you are away from the spot. So, at twice the distance the spot will be 1/4th as intense. I commonly look at diffuse reflections without goggles. But, that is me.
 




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