Back in 2001, [Helmar] made an awesome monochrome video display out of a red laser pointer and a spinning ... The ancient website for [Helmar]’s green-only projector goes over the principles ...

Laser pointers (sometimes known as laser pens) are compact, handheld laser devices. They are typically used to highlight an object or point of interest by illuminating it with a bright spot of colored ...

However, ironically for him, he is alarmed that many green laser pointers are more powerful than they are supposed to be. Sure, you often want a powerful laser, but if you think a laser is safe ...