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Well, I think same as you. I don't know the reasons for that. We used 20mW red lasers most of the time, and also for a short time we did some with 120mW blue laser. Blue one was accompanied by several mirrors, some with 50% passing and 50% reflecting. That was a bit scary I must say.

I can pay 150$ if they will be good. I want not some protection but safe protection.

I was only dealing with low power lasers so I dont have any glasses for protection. And on my university they said that they wont give us glasses because then we would not see the light and couldnt properly adjust some devices. Which one should I buy?

I am not sure I understood you. I was checking this on a slice of a pickle, shining light onto it's surface and it turned violet. I didn't check the outside layer of a cucumber (if I understood you meant that saying skin).

My green laser pointer is 532nm. Doesn't that mean that it's converted from infrared? And why pickles fluorescence in violet while being green?

AFAIK green laser diodes are just infrared emitters with the crystal shortening the wavelength by half. Am I wrong? And why my 405nm laser seems to fluorescing much more than green one, on more kinds of surfaces and much brighter? Sorry for somewhat newbie questions, I am new to lasers, but...

So I read some wikipedia articles on that subject. I read that the wavelength of fluorescence is longer than the light's shining on object so I think I get it why only reddish ones do that. But there they say that things fluorescence when under the ultraviolet radiation what I knew before but I...

https://www.youtube.com/watch?v=mJYP-ASfffg&feature=youtube_gdata_player Here you can see it happens only for reddish ones. Is it because infrared radiation is leaking because of weak filter? And here is the photo with multiple spots so it can be easily seen that on the yellow green and blue...

But only on orange like surfaces? And why is that happening? I mean on the molecular level? Sent from my Nexus 7 using Tapatalk

I have recently bought a cheap green laser pointer. It's power I assume is much greater than 5mW it should have but I didn't measure it yet. Today I noticed that when I shine it on the kind of orange plastic scrap the dot changes itself into orange one. Same happens with red/pink one. But on the...