Old 07-01-2016, 01:10 PM #1
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Question Yet another laser safety question

Hello everyone,

I'am sorry to open a milionth thread about safety glasses. I've read tons of resources in the last month... but I'am still still not entirely sure which glasses to choose.

I will be trying to do some "engraving" with 650nm laser diodes from dvd burners (up to 24x speed drives) and maybe later with some 405nm diodes from blu-ray
burners (up to 16x speed drives).

Will these glasses be sufficient to protect me against those two wavelenghts?
Eagle PairŪ 190-470nm & 660-760nm Laser Safety Goggles

Or do I have to buy one pair of glasses for each wavelenght?
Eagle PairŪ 190-400nm & 580-760nm Laser Safety Goggles
and
Eagle PairŪ 190-540nm Standard Laser Safety Goggles

I want to stay safe, but I don't also want to ruin my wallet unnecessarily.

Thank You everyone for Your answers.


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Old 07-01-2016, 02:58 PM #2
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Default Re: Yet another laser safety question

Quote:
Originally Posted by ksaar View Post
Hello everyone,

I'am sorry to open a milionth thread about safety glasses. I've read tons of resources in the last month... but I'am still still not entirely sure which glasses to choose.

I will be trying to do some "engraving" with 650nm laser diodes from dvd burners (up to 24x speed drives) and maybe later with some 405nm diodes from blu-ray
burners (up to 16x speed drives).

Will these glasses be sufficient to protect me against those two wavelenghts?
Eagle PairŪ 190-470nm & 660-760nm Laser Safety Goggles

Or do I have to buy one pair of glasses for each wavelenght?
Eagle PairŪ 190-400nm & 580-760nm Laser Safety Goggles
and
Eagle PairŪ 190-540nm Standard Laser Safety Goggles

I want to stay safe, but I don't also want to ruin my wallet unnecessarily.

Thank You everyone for Your answers.
They're rated for those two wavelengths. Sooo yes they will protect you from them.

Edit: Wait I'm an idiot. The first pair is not rated for 650nm. Get a different pair.

If they say they will protect you from the wavelength you want, then trust them. If they say they wont protect you from that wavelength, get a different pair. Simple.
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Old 07-01-2016, 03:13 PM #3
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Default Re: Yet another laser safety question

How powerful is you 650nm, if it is 1W then you need OD 3+. The glasses state that they are OD 2.5 at 635nm.
650nm is very close to 660nm, if there was a graph I could tell you exactly, but you can estimate the OD being around OD 3.2-3.4. But without a graph I can not be sure.
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Old 07-01-2016, 03:29 PM #4
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Default Re: Yet another laser safety question

These particular 650nm diodes should be around 250-300mW I believe. They would certainly not go over 500mW.
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Old 07-01-2016, 03:37 PM #5
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Default Re: Yet another laser safety question

If I allow for 500mW to be on the safe side, then the OD required would be 2.7, but 300mW would be 2.48. I believe these goggles would be adequate as they are rated OD 4+ for 660nm onwards, but I don't know how much I trust there specs as there is no graph or safety certification of an kind. They say they are CE certified but where is the proof?
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Old 07-01-2016, 03:41 PM #6
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Default Re: Yet another laser safety question

Sorry, I have just realised you are a new member here. Welcome to the forum Ksaar. It is good to see that you inquiring about safety.
If you ever want to know what OD you need for your goggles, just use log(mW) "mW" being the power of your laser of course.
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Old 07-01-2016, 03:46 PM #7
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Default Re: Yet another laser safety question

Yes I know... It seems a bit "fishy" to me, but I've read a lot of good reference about Survivallaser and the Eagle Pair glasses they sell.

The first pair I wrote about is described as 190-470/660-760 by the seller, but if You zoom in closer on their picture, then there are numbers 190-470/610-760.

edit: thank You for welcome

Last edited by ksaar; 07-01-2016 at 03:48 PM.
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Old 07-01-2016, 03:53 PM #8
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Default Re: Yet another laser safety question

610 being there maximum usable range most possibly. They may just be being careful, as the glasses are listed at OD 4+ implying high powered class IV usage, and they don't want anyone using class IV out of the 660nm bracket as they wouldn't be suitable. If there googles are OD 2.5 at 635nm then they have already dropped into the class IIIb category. Has anyone on this forum had any experience with Survival Laser?
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Old 07-01-2016, 07:44 PM #9
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Default Re: Yet another laser safety question

for example this thread >>> Eagle Pair safety glasses both 200-450nm and 580-760nm from powerfulpurchase on Ebay
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Old 07-12-2016, 08:43 AM #10
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Default Re: Yet another laser safety question

I've asked Gary from survivallaser.com about these safety glasses -> Eagle PairŪ 190-470nm & 660-760nm Laser Safety Goggles.

He has told me that these glasses should be adequate against 500mW 650nm laser light.

OD graph from manufacturer (provided by Gary).



Edit:

I've made a little digging and I believe this is the manufacturers website -> Beijing JinJihongYe Tech. & Trade Co., Ltd.-EP-13 (190-470&610-760nm)

Last edited by ksaar; 07-12-2016 at 08:47 AM.
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Old 07-12-2016, 09:10 AM #11
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Default Re: Yet another laser safety question

Brilliant work, the graph is conclusive. They will be safe for use.
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Old 07-12-2016, 09:17 AM #12
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Default Re: Yet another laser safety question

Thank you for advice. I will report after they arrive
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Old 07-12-2016, 09:23 AM #13
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Default Re: Yet another laser safety question

No problem, enjoy your laser.
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Old 07-12-2016, 11:04 AM #14
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Default Re: Yet another laser safety question

Quote:
Originally Posted by ksaar View Post
Hello everyone,

I'am sorry to open a milionth thread about safety glasses. I've read tons of resources in the last month... but I'am still still not entirely sure which glasses to choose.

I will be trying to do some "engraving" with 650nm laser diodes from dvd burners (up to 24x speed drives) and maybe later with some 405nm diodes from blu-ray
burners (up to 16x speed drives).

Will these glasses be sufficient to protect me against those two wavelenghts?
Eagle PairŪ 190-470nm & 660-760nm Laser Safety Goggles

Or do I have to buy one pair of glasses for each wavelenght?
Eagle PairŪ 190-400nm & 580-760nm Laser Safety Goggles
and
Eagle PairŪ 190-540nm Standard Laser Safety Goggles

I want to stay safe, but I don't also want to ruin my wallet unnecessarily.

Thank You everyone for Your answers.
You can never go wrong buying good tools, plus you may want to use them for 532nm or 450nm later and I don't like that drop at 490nm as 450nm is not that well protected against, you may well want to use a 445-450nm diode later, I would get the 2 you listed
Eagle PairŪ 190-400nm & 580-760nm Laser Safety Goggles
and
Eagle PairŪ 190-540nm Standard Laser Safety Goggles
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Last edited by RedCowboy; 07-12-2016 at 11:07 AM.
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Old 07-13-2016, 07:19 AM #15
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Default Re: Yet another laser safety question

Quote:
Originally Posted by RedCowboy View Post
You can never go wrong buying good tools, plus you may want to use them for 532nm or 450nm later and I don't like that drop at 490nm as 450nm is not that well protected against, you may well want to use a 445-450nm diode later, I would get the 2 you listed
Eagle PairŪ 190-400nm & 580-760nm Laser Safety Goggles
and
Eagle PairŪ 190-540nm Standard Laser Safety Goggles
Well... you got me I have ordered these two that you suggest.
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