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Where prior Oculus Rift kits shipped with interchangeable circular lenses (left), the CV1 uses a single set of non-removable, asymmetric lenses (right). A closeup of the CV1 lens reveals these concentric rings, a telltale sign of Fresnel lenses. 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. 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.
  • Where prior Oculus Rift kits shipped with interchangeable circular lenses (left), the CV1 uses a single set of non-removable, asymmetric lenses (right).

  • A closeup of the CV1 lens reveals these concentric rings, a telltale sign of Fresnel lenses. 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.

  • 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.

  • 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.

Während frühere Rift Kits noch mit austauschbaren runden Linsen kamen, nutzt das Rift CV1 eine einzelne asymmetrische Linse (rechts).

Bei näherer Betrachtung der Linse des CV1 zeigen sich die konzentrischen Ringe, es handelt sich also um Fresnel Linse. Diese Linsen haben den selben Effekt wie die dickeren, gebogenen Linsen der früheren Rift Generationen, wiegen jedoch weit weniger.

Die Fresnel Linsen bieten den selben Blickwinkel und die kleine Brennweite mit wesentlich weniger Material.

Mit den variierenden Größen und Formen hat es Oculus geschafft, die Linsen für diesen Anwendungsfall zu perfektionieren. Das Ergebnis der asymmetrischen Formen sollten also weniger Bildfehler sein.

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