Hello
Not sure if this should be in general, science or measurements section.
After getting familiar with the fact that 532 nm lasers have a lousy efficency and that they waste 300 mA for nothing before starting to operate, and that my "5 mW" green pen uses 1.14W (for a nominal efficiency of...
Hello
After getting six "5 mW" pen pointers, two 405 nm (violet), two 635 nm (orange), one 532 nm (orange) and one 650 nm (red) I wonder if these really are all 5 mW pointers.
The red one is misaligned, and in addition to the dot, there is a semi-arc around it. The two orange ones were equally...
Hello
I'd like to mail order protective glasses for me and the whole family. I need trustworthy and standardized glasses that a professional would use while working with class 3b equipment.
I need IR and green protection. But how dim should the glasses be? How strong glasses does one need to...
Hello
I got to try out an 50mW green laser, purchased from buywithcoins.com
I have read about laser safety and everything, but I wonder if I got over excited. Pointing it downwards at a white wallpaper, it was not too uncomfortable from some 5ft distance. Pointing it under the leaves of a...