Is it just me or is there some sort of resistance to people adding their own IR filter to their greens?
Its very easy to slap a IR filter on them. Yet I don't hear enough people mention that they do it. They wear laser goggles but don't bother with IR filters?
I mean I know the IR beam usually has high divergence (reduces the risk at distance) but since its easy & 808 is mostly invisible, its worth it. I'm just not fond of invisible hazards to my eyes.
If you have a ton of greens & don't want to buy a filter for each one then just glue on a ring magnet (or 2 magnets on opposite edges of the filter) & add a narrow steel washer to each green you have. Now they can share your IR filter(s). You could also cut one of the 10mm filters into 4 & then they would only cost ~$1 ea.
If the IR leaking is the 1064nm it will remain fairly good collimated with the green, if you really want the highest power than no filter can help, but it requires more expensive darker safety eyewear. Cheapest and best solution is indeed an IR filter.
I will do a very thorough review of different glasses, including damage testing. A LOT of people have decent glasses, but even if they didn't that doesn't make it the right thing to do. Most people have one pair or a second for demonstration and just don't have more people in the room than they have glasses when there is a laser on. That simple.
For the EN207 certification (besides the 10second/100pulses) glasses would have to conform to this:
- no Q-Switch-Effect
- low dioptrical effects
- quality of materials and surface
- low stray light < 0,5 cd/m²lx
- no secondary radiation
- thermal resistance
- field of vision >40°
- shatter resistance
This isn't a simple list but just the table of content for al the standards. EVERY real laser safety eyewear manufactor can trace every single filter back to the batch of materials that are supplied to them. EVERY standard is CONTINUOUSLY verified by measurements by testing samples. Strict quality control is needed to guarantee other glasses will perfom the same.
THAT is what Uvex does and every chinese supplier completely ignores. THIS is the difference between actual guaranteed safety and no guarantees, which is not what safety is about. This also is why no vendor can provide safety for just $8, don't believe the fairy tale that everything can be made cheap. You get what you pay for. My eyes are priceless, so I don't mind spending a lot when it comes to their safety. Nobody should of they picked the wrong hobby (and by hobby I mean the experimenting, burning and not the star-pointing-only folks).
I wouldn't have cheap chinese safety belts in my car that nobody ever tested or even designed properly for the task. This is the same principle although you only damage your eyes.
I have two pairs of EAGLE PAIR EP-1 190-540 & 800-2000nm laser goggles. While they work fantastically for my ~1.5 W 445, they dont stop the beam from my 5 mW green laser pointer!:wtf: No my pointer is not a cheapie it is a several hundred dollar industrial IR FILTERED alignment laser.... They state on their website that the OD for 532 nm is 4! This is also represented, although not clearly, on their OD vs Wavelength graph below.
Just putting it out there if you are considering buying these for a green laser...Anyone else tested these with a 532?
That is interesting. The uvex definitely make a huge difference on 532 green. I tested and was getting less than 10% through with the greens, and we are pretty sure (but haven't tested yet, I have some ir filters on order from o-like if they EVER send them.
As you can see from their spec sheet, they are rock solid up to 540nm.