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Modifiche al passo #12

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Modifica approvata da Evan Noronha

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[* black] Where prior Oculus Rift kits shipped with interchangeable circular lenses (left), the CV1 uses a single set of non-removable, asymmetric lenses (right).
[* black] A closeup of the CV1 lens reveals these concentric rings, a telltale sign of [https://en.wikipedia.org/wiki/Fresnel_lens|Fresnel lenses|new_window=true]. These cleverly manufactured lenses do the same job as the thick, bulging, curved plastic lenses seen in prior Rifts—using thin arrays of concentric prisms that ''weigh'' far less.
- [* icon_note] The Fresnel lens yields the same large aperture and short focal length, but with a fraction of the material—which is exactly what VR needs. It all has to go into a brick-sized device you can strap to your face for hours, without putting a strain on your poor neck muscles.
+ [* icon_note] The Fresnel lens yields the same large viewing angle and short focal length, but with a fraction of the material—which is exactly what VR needs. It all has to go into a brick-sized device you can strap to your face for hours, without putting a strain on your poor neck muscles.
[* black] Bonus round: by varying the size and shape of the concentric prisms, Oculus was able to fine-tune the lens for this specific application, minimizing spherical aberrations (or distortions) that may result from a traditional curved lens. This probably explains the asymmetric shape.