Apple prognosticator Ming-Chi Kuo is not done dispensing rumors about the company’s long-rumored mixed reality headset. This time, per 9to5Mac, Kuo has details on the headset’s weight: reportedly less than 150 grams thanks to the use of hybrid ultra-short focal length lenses.
If you struggle with metric conversions, 150 grams is absurdly light. It’s the equivalent of about five ounces. You know what else weighs five ounces? According to Weight of Stuff, that’s roughly equivalent to a baseball, half a deck of cards, a checkbook, a medium-sized apple, and a small bottle of glue. As far as smartphones go, that would be lighter than the iPhone 12, which weighs 164 grams, or 5.78 ounces.
Holy guacamole, Batman, that’s a game-changer when it comes to mixed reality headsets. Most are relatively bulky and are significantly heavier. The Oculus Quest 2, for instance, weighs 503 grams, or 17.7 ounces. Microsoft’s HoloLens 2 is even heavier at 566 grams, or close to 20 ounces. That’s 1.1 and 1.2 pounds, respectively. In the grand scheme of things, that’s not outrageously heavy—but it does start to weigh on you if you’re trying to wear a headset for an extended period of time. Plus, there’s no two ways about it—you look stupid in a bulky headset no matter how cool the tech is.
Part of how Kuo believes Apple will do this is by adopting a hybrid Fresnel lens design. More specifically, AppleInsider quotes Kuo as saying that each Fresnel lens “comprises three stacked Fresnel lenses.”
If you’re unfamiliar with Fresnel lenses, they’re basically lenses with a lot of concentric grooves etched into the material. There’s a lot of fancy optics involved, but the gist is that you can focus light in a way that’s similar to (or potentially better than) a conventional curved lens. The bonus is that you can use plastic instead of glass, thereby reducing weight, and Fresnel lenses can be much thinner than conventional lenses. They were initially used in lighthouses, but these days you can find them in VR headsets like the HTC Vive because they can help users focus on an image at an extremely close