Re: New user safety questions
If it is going to be used JUST for non-living target shooting, you MIGHT be ok. I really wouldn't recommend it though - as you said refections can occur no matter how careful you are. If you are of a curious nature as most of us here are, you'll end up using the laser for other things. A 20 mW greenie will look pretty cool in dark places and at night. By asking if there are goggles with ballistic properties, I assume that you wear protetive goggles when shooting anyway. Would you take a chance shooting w/o protection? If not, why you would you go with out when using a laser?
I have seen some goggles/glasses on eBay that claim to be Military issue and have laser and impact protection. I emailed one seller asking about the 532nm wavelength. He stated that the manual DID NOT specifically say protection from the 532nm wavelength, but it did say "green" laser protection. He stated that he would look into it more if I wanted him to. I did not follow up though, as I picked up a pair of DeWalt red laser enhancer glasses (blocks all non-red wavelengths - works almost too well) off ebay for $6. Might be worth looking into though as if it does offer protection, it would cover your needs. Just make sure and do your homework before buying, as I don't know any more than I stated - they could be junk. I think the pair I was looking at sold for around $20 shipped.