About five years ago, Apple design guru Jony Ive decided he wanted a new feature for the next MacBook: a small dot of green light above the screen, shining through the computerâ€™s aluminum casing to indicate when its camera was on. The problem? Itâ€™s physically impossible to shine light through metal.
Ive called in a team of manufacturing and materials experts to figure out how to make the impossible possible […] The team discovered it could use a customized laser to poke holes in the aluminum small enough to be nearly invisible to the human eye but big enough to let light through.
I took out my Apple Bluetooth Keyboard and took a look through a loupe. Upon close inspection there really are holes, 37 tiny almost invisible ones. The same laser technology is also used on the sleep indicator on my MacBook Pro. There are two rows of ’em. Just incredible.
Update: I recently got hold of the Olloclip and fiddled with the macro lens. Here’s a close look at those invisible holes used for the sleep indicator doing their magical thing: