I am researching what appropriate eye protection to purchase for use with higher powered red lasers.
I found a nice guide (http://www.stockeryale.com/i/lasers/...ty_eyewear.pdf) that gives a method for calculating a safe OD. If I assume a 50% margin of error, that 200 mw laser "could" be up to 300 mw, and using the formula I find there I should look for a set of goggles that can handle the laser wavelength with an OD of 3.
The affordable glasses I had been looking at were at MWK (http://www.mwklasers.com/goggles.htm), but their OD is only 1.8. Using the formula from the previously mentioned site, that would result in a residual 4.8 mW in the event that a 300 mW beam directly hit the glasses.
Not bad, but not up to the margin of safety suggested by the Stockeryale site. Looking at the sources mentioned in the stickeyed thread finds most glasses of any OD running in the hundred to several hundreds range.
I'm a teacher, so I'm not running on a huge budget, and I was hoping to find decent, safe eyewear for a modest price. Are there any other options out there, or am I going to be stuck paying a couple of hundred USD for acceptable safety?