alt Hacker News>> It’s mesmerizing to watch. When the laser is done cutting, sometimes the leftover material just falls out, but sometimes it stays in place.
Please be very careful when watching an industrial laser, particularly one cutting shiny metal. I would honestly support any reg that puts hard barriers between eyeballs and running laser equipment. Invest in a good camera and watch the show on a screen.
It is enclosed. They show a picture later and there's a green safety window to view the work piece in the machine, that material will be designed to block whatever wavelength of light the laser is using (most likely IR, and what do you know safety glasses for the IR bands are mostly green).