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Metrology of injection molded polymer optics for a commercial VR system

机译：用于商用VR系统的注塑聚合物光学器件的计量

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Virtual reality and augmented reality devices require increasingly demanding optical components. Head mounted displays for VR systems often use molded Fresnel lenses, which can be affordably mass produced, maintain low weight, and still achieve high optical performance. Here, we describe an optical system designed for a wide field-of-view, consumer VR headset. Custom tooling was fabricated via diamond turning in order to injection mold the acrylic lenses. Each optical channel is composed of two lenses. The lenses have a spherical-convex surface and an aspheric-convex Fresnel on a spherical-concave surface; the radii of the spherical surfaces differ between the two lenses. Each lens pair relays the image from a compatible smartphone to the eye. To assess the quality of the lenses, the surface finish and surface profiles were measured using a white light interferometer and a contact profilometer, respectively. The lenses were assembled into a custom headset, and their performance was demonstrated via commercial VR software.
机译：虚拟现实和增强现实设备需要越来越苛刻的光学组件。用于VR系统的头戴式显示器通常使用模制菲涅耳透镜，该透镜可以大量生产，负担得起的重量轻且仍实现高光学性能。在这里，我们描述了一种为宽视角消费类VR耳机设计的光学系统。定制工具是通过金刚石车削加工而成的，以便对丙烯酸镜片进行注塑成型。每个光通道由两个透镜组成。透镜具有球面-凸面和球面-凹面上的非球面菲涅耳;两个透镜的球面半径不同。每个镜头对都将来自兼容智能手机的图像中继到眼睛。为了评估镜片的质量，分别使用白光干涉仪和接触轮廓仪测量了表面光洁度和表面轮廓。这些镜头被组装到定制的头戴式耳机中，并通过商用VR软件演示了它们的性能。

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