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Translating step 13

Step 13
  • We interrupt this teardown for a Science Party. Dim the lights, fire up the smoke machine, and bring the laser beams!

  • So when you put it all together, what does a lens in a VR headset actually do?

  • For the VR experience to be realistic and not cause great discomfort, you need the optics to do two things: magnify the display so that you can't see the edges (which would kill the immersion), and focus the display at optical infinity.

  • That last one is a fancy optics term that means objects on the display have to appear far away. The lens realigns the incoming light into parallel rays, so you don't have to do any work to focus, preventing eye strain.

  • TL;DR: The Rift's lenses make up for your eyes' and the displays' shortcomings, making you think you're looking at an endless, distant display (instead of a TV screen glued to your face).

我们在拆解中来了一场科学盛宴。关掉灯,打开烟雾机,然后打上激光!

所以当你把这些弄好以后,你就能知道,VR头显中的透镜究竟有什么用?

要让虚拟场景感觉起来既真实又舒适,所谓“身临其境”,你需要VR光学成像达到以下两个标准:第一,放大图像,这样才看不到边缘;第二,画面可以聚焦在远处,呈现出无限的景深。而以上这种独特的透镜正好能做到二者兼得。

无限景深是一个光学词汇,意思是物体聚焦在无限的远处。这些透镜把来的光聚成平行光线,所以你的眼镜不需要聚焦,这样可以避免视疲劳。

TL;DR:透镜弥补了你的眼镜和显示屏的局限性,使得你认为你在看一个无限大、远距离的画面,而不是黏在脸前的电视屏幕。

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