File:Google Glass Explorer Optics Schematic.png

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Summary

Description
English: Cross section of an eyepiece (200), for use in a head mounted display (HMD) with components:
  • 120 - viewer's eye
  • 200 - heads-up display eyepiece including:
  • 201 - ambient scene side of eyepiece
  • 202 - eyeward side of eyepiece
  • 203 - forward light propagation path
  • 204 - reverse light propagation path
  • 205 - frame holding components
  • 210 - in-coupling Polarizing Beam Splitter (PBS)
  • 215 - out-coupling partially reflecting half-silvered mirror
  • 230 - illumination region
  • 235 - viewing region
  • 240 - illumination assembly including an LED array with red, green, and blue LEDs and a polarization conversion system composed of a reflector, a wedge with a microlens array, a polarizing diffuser, and a crossed wire-grid polarizer.[1]
  • 245 - Liquid Crystal on Silicon (LCoS) display
  • 250 - plano-convex collimating lens with astigmatism correction; 81.87mm vertical radius, 83.20mm horizontal radius
  • 255 - reflector; formed using a reflective coating on lens 250
  • 270 - external scene
Date
Source U.S. Patent 20,130,070,338 application, U.S. Patent 20,130,207,887 application.
Author Gupta, Anurag.; Amirparviz, Babak; Sharma, Sumit; Raffle, Hayes S.; Wang, Chia-Jean

Licensing

Public domain
This file is in the public domain because as the United States Patent and Trademark Office guideline in "Editorial Standards - Publications and Citations" states, "Subject to limited exceptions reflected in 37 CFR 1.71(d) & (e) and 37 CFR 1.84(s), the text and drawings of a patent are typically not subject to copyright restrictions." U.S. Patent 20,130,070,338 application does not include a 37 CFR 1.71(e) notice.

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  1. ↑ How does Google Glass project the image onto the glass?. Quora (2015-09-21).

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inception

11 September 2011

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Date/TimeThumbnailDimensionsUserComment
current00:27, 6 February 2014Thumbnail for version as of 00:27, 6 February 20142,112 × 1,541 (65 KB)MarkWarrenReplace out-coupling PBS with a partially reflecting mirror beam splitter.
23:22, 4 February 2014Thumbnail for version as of 23:22, 4 February 20142,112 × 1,541 (68 KB)MarkWarrenMoved labels to crop smaller. Added LED, LCoS, PBS labels. Differentiate light rays based polarization.
18:44, 4 February 2014Thumbnail for version as of 18:44, 4 February 20142,460 × 2,044 (48 KB)MarkWarrenUser created page with UploadWizard
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