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What Goggles do I need?

Fizzy Root Beer

Fizzy Root Beer

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I purchased a red laser the other day. It is my first. I don't know what goggles to get though. I will be using it to light fireworks and other things mainly. I would like to learn the basics of lasers also it is very interesting to me. here is a link to the laser 650 200mW 532nm Red Beam Laser Pointer (Black) Do I even need goggles?:thanks:
 
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StardustSprinkles

StardustSprinkles

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You'll need goggles to protect you when close range burning, the light is quite intense up close.

Here

EDIT: Welcome to the forum, remember to use the search bar, a quick search would've revealed the information you asked for here. :) :welcome:
 
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Rafa

Rafa

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Yeah you will need some glasses.
KRR Filters, for example.
OD3 or OD4 is fine.
 
designedfor1

designedfor1

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I don't think I would have ordered from them.

WHY?

They claim a RED laser is at the 532nm spectrum.....

As far as goggles for that laser I would get an OD (optical density) of 1.5 - 2, IMO any thing after that will be extra protection.
 
Fizzy Root Beer

Fizzy Root Beer

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designedfor1 said:
I don't think I would have ordered from them.

WHY?

They claim a RED laser is at the 532nm spectrum.....

As far as goggles for that laser I would get an OD (optical density) of 1.5 - 2, IMO any thing after that will be extra protection.
Click to expand...
Why can't a red laser be at 532nm spectrum?
 
StardustSprinkles

StardustSprinkles

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^I seriously hope that's a joke...
EDIT:
Electromagnetic-Spectrum.png


Find 532nm on this graph for me, then you tell me why 532nm isn't red...
 
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ped

ped

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Next he'll be asking how bright a 808nm laser is :)
 
Eudaimonium

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Sellers just intentionally put "532nm" in any product that has a "laser" in it's title for the sole purpose of getting more google hits, increasing chances some noob is gonna stumble apon it and buy it.

At least, that's what it looks like.

Fizzy, 532nm is a mark of lenght. That's five hundred thirty two nano meters. What's that small you ask? It's peak to peak wavelenght of the light produced by the laser.
If you look at the graph posted, you'll see it's a lime green color (to human beings at least).

Red laser described uses a laser diode which is emitting light of wavelenght of around 650 nm, which is red.

There is no 532 nm "spectrum" . Spectrum is collection of wavelenghts, right?
 
Fizzy Root Beer

Fizzy Root Beer

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I found the model number. It is actually 660 nm. I am understanding everything. It is fascinating. Thanks for the help. I am a laser noobie, but i'm learning.
 
J

JonHorde

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Im a pilot looking for best broad spectrum goggles I can find, to have with me when I fly. I like the Eagle Pair 190-540, $42. Any thoughts?
I assume, when Im building, its best to buy another specific set for the wavelength Im using?
First build this weekend, Driver, Dummy Load, salvageing DVD 4x burner, in that order...
The $6 focalprice goggles are good enough for spectators looking at reflected spot?
Most diodes produce additional multiples of base frequency, eg, 532nm to 1064? or at least some IR with the base frequency? If so would I be unprotected by the 190-540 goggles?
 
Ghostchrome

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JonHorde said:
Im a pilot looking for best broad spectrum goggles I can find, to have with me when I fly. I like the Eagle Pair 190-540, $42. Any thoughts?
I assume, when Im building, its best to buy another specific set for the wavelength Im using?
First build this weekend, Driver, Dummy Load, salvageing DVD 4x burner, in that order...
The $6 focalprice goggles are good enough for spectators looking at reflected spot?
Most diodes produce additional multiples of base frequency, eg, 532nm to 1064? or at least some IR with the base frequency? If so would I be unprotected by the 190-540 goggles?
Click to expand...


Always use goggles rated for the same wavelength that you are using. No one set of goggles will cover you for everything. IR isn't an issue with most lasers except for green (because of the way they are built) and of course IR diodes. What diode are you going to be building with?
 
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J

JonHorde

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Thank you. Looking to practice on dead 4x DVD burner today, harvested 2 diodes. Not sure which is the DVD and which is the cd as they both have three pins. One is housed in a slightly larger heat sink so I'm guessing that's the DVD, red, 660nm? The smaller heat sink would be the cd, IR?
I don't want to mess with the IR so I'll dig alittle more to see what color this D43010 burner is. Are dvd burners all the same color?
So, no goggles will really protect me while I'm flying? There will be no way to predict what frequency might be shot at me.
While experimenting, I plan to view everything through my iPhone for protection till I buy a specific diode to make a burner. I have time, still waiting for my driver 100 ohm pot to arrive, didn't have one in my pile.
If I make a burner, probably green, as you said because of the unfiltered IR, and higher conversion effeciency, I'll be looking for goggles that protect green and IR. Can you recommend any?
Thanks. Sorry if some of these question have been asked before. New to the field, still following dozens of these threads each day. Way cool stuff here.
 
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Bluefan

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Unless the type of dvd burner is known it's hard to say which one is which. The bigger heatsink may be the IR one because it may burn CD's at higher laser powers. Testing them is possible, but do it without a collimating lens and be very carefull! The 780nm light is hardly visible but is definately there! Nearly all DVD players will have a 650~660nm laser diode, I haven't heard of a single one that does it different.
If you have >5mW laser invest in appropriate laser safety glasses beforehand, don't skip on safety. No safety glasses cover all wavelengths, some cover nearly everything but that makes them very dark.
 
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