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Home > Science, Technology & Agriculture > Other technologies and applied sciences > Applied optics > Optical Architectures for Augmented-, Virtual-, and Mixed-Reality Headsets: (Press Monographs)
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Optical Architectures for Augmented-, Virtual-, and Mixed-Reality Headsets: (Press Monographs)

Optical Architectures for Augmented-, Virtual-, and Mixed-Reality Headsets: (Press Monographs)


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About the Book

This book is a timely review of the various optical architectures, display technologies, and building blocks for modern consumer, enterprise, and defense head-mounted displays for various applications, including smart glasses, smart eyewear, and virtual-reality, augmented-reality, and mixed-reality headsets. Special attention is paid to the facets of the human perception system and the need for a human-centric optical design process that allows for the most comfortable headset that does not compromise the user’s experience. Major challenges--from wearability and visual comfort to sensory and display immersion--must be overcome to meet market analyst expectations, and the book reviews the most appropriate optical technologies to address such challenges, as well as the latest product implementations.

Table of Contents:

  • 1 Introduction
  • Word of Caution for the Rigorous Optical Engineer
  • 2 Maturity Levels of the AR/VR/MR/Smart-Glasses Markets
  • 3 The Emergence of MR as the Next Computing Platform
  • 3.1 Today's Mixed-Reality Check
  • 4 Keys to the Ultimate MR Experience
  • 4.1 Wearable, Vestibular, Visual, and Social Comfort
  • 4.2 Display Immersion
  • 4.3 Presence
  • 5 Human Factors
  • 5.1 The Human Visual System
  • 5.1.1 Line of sight and optical axis
  • 5.1.2 Lateral and longitudinal chromatic aberrations
  • 5.1.3 Visual acuity
  • 5.1.4 Stereo acuity and stereo disparity
  • 5.1.5 Eye model
  • 5.1.6 Specifics of the human-vision FOV
  • 5.2 Adapting Display Hardware to the Human Visual System
  • 5.3 Perceived Angular Resolution, FOV, and Color Uniformity
  • 6 Optical Specifications Driving AR/VR Architecture and Technology Choices
  • 6.1 Display System
  • 6.2 Eyebox
  • 6.3 Eye Relief and Vertex Distance
  • 6.4 Reconciling the Eye Box and Eye Relief
  • 6.5 Field of View
  • 6.6 Pupil Swim
  • 6.7 Display Immersion
  • 6.8 Stereo Overlap
  • 6.9 Brightness: Luminance and Illuminance
  • 6.10 Eye Safety Regulations
  • 6.11 Angular Resolution
  • 6.12 Foveated Rendering and Optical Foveation
  • 7 Functional Optical Building Blocks of an MR Headset
  • 7.1 Display Engine
  • 7.1.1 Panel display systems
  • 7.1.2 Increasing the angular resolution in the time domain
  • 7.1.3 Parasitic display effects: screen door, aliasing, motion blur, and Mura effects
  • 7.1.4 Scanning display systems
  • 7.1.5 Diffractive display systems
  • 7.2 Display Illumination Architectures
  • 7.3 Display Engine Optical Architectures
  • 7.4 Combiner Optics and Exit Pupil Expansion
  • 8 Invariants in HMD Optical Systems, and Strategies to Overcome Them
  • 8.1 Mechanical IPD Adjustment
  • 8.2 Pupil Expansion
  • 8.3 Exit Pupil Replication
  • 8.4 Gaze-Contingent Exit Pupil Steering
  • 8.5 Exit Pupil Tiling
  • 8.6 Gaze-Contingent Collimation Lens Movement
  • 8.7 Exit Pupil Switching
  • 9 Roadmap for VR Headset Optics
  • 9.1 Hardware Architecture Migration
  • 9.2 Display Technology Migration
  • 9.3 Optical Technology Migration
  • 10 Digital See-Through VR Headsets
  • 11 Free-Space Combiners
  • 11.1 Flat Half-Tone Combiners
  • 11.2 Single Large Curved-Visor Combiners
  • 11.3 Air Birdbath Combiners
  • 11.4 Cemented Birdbath–Prism Combiners
  • 11.5 See-Around Prim Combiners
  • 11.6 Single Reflector Combiners for Smart Glasses
  • 11.7 Off-Axis Multiple Reflectors Combiners
  • 11.8 Hybrid Optical Element Combiners
  • 11.9 Pupil Expansion Schemes in MEMS-Based Free-Space Combiners
  • 11.10 Summary of Free-Space Combiner Architectures
  • 11.11 Compact, Wide-FOV See-Through Shell Displays
  • 12 Freeform TIR Prism Combiners
  • 12.1 Single-TIR-Bounce Prism Combiners
  • 12.2 Multiple-TIR-Bounce Prism Combiners
  • 13 Manufacturing Techniques for Free-Space Combiner Optics
  • 13.1 Ophthalmic Lens Manufacturing
  • 13.2 Freeform Diamond Turning and Injection Molding
  • 13.3 UV Casting Process
  • 13.4 Additive Manufacturing of Optical Elements
  • 13.5 Surface Figures for Lens Parts Used in AR Imaging
  • 14 Waveguide Combiners
  • 14.1 Curved Waveguide Combiners and Single Exit Pupil
  • 14.2 Continuum from Flat to Curved Waveguides and Extractor Mirrors
  • 14.3 One-Dimensional Eyebox Expansion
  • 14.4 Two-Dimensional Eyebox Expansion
  • 14.5 Display Engine Requirements for 1D or 2D EPE Waveguides
  • 14.6 Choosing the Right Waveguide Coupler Technology
  • 14.6.1 Refractive/reflective coupler elements
  • 14.6.2 Diffractive/holographic coupler elements
  • 14.6.3 Achromatic coupler technologies
  • 14.6.4 Summary of waveguide coupler technologies
  • 15 Design and Modeling of Optical Waveguide Combiners
  • 15.1 Waveguide Coupler Design, Optimization, and Modeling
  • 15.1.1 Coupler/light interaction model
  • 15.1.2 Increasing FOV by using the illumination spectrum
  • 15.1.3 Increasing FOV by optimizing grating coupler parameters
  • 15.1.4 Using dynamic couplers to increase waveguide combiner functionality
  • 15.2 High-Level Waveguide-Combiner Design
  • 15.2.1 Choosing the waveguide coupler layout architecture
  • 15.2.2 Building a uniform eyebox
  • 15.2.3 Spectral spread compensation in diffractive waveguide combiners
  • 15.2.4 Field spread in waveguide combiners
  • 15.2.5 Focus spread in waveguide combiners
  • 15.2.6 Polarization conversion in diffractive waveguide combiners
  • 15.2.7 Propagating full-color images in the waveguide combiner over a maximum FOV
  • 15.2.8 Waveguide-coupler lateral geometries
  • 15.2.9 Reducing the number of plates for full-color display over the maximum allowed FOV
  • 16 Manufacturing Techniques for Waveguide Combiners
  • 16.1 Wafer-Scale Micro- and Nano-Optics Origination
  • 16.1.1 Interference lithography
  • 16.1.2 Multilevel, direct-write, and grayscale optical lithography
  • 16.1.3 Proportional ion beam etching
  • 16.2 Wafer-Scale Optics Mass Replication
  • 17 Smart Contact Lenses and Beyond
  • 17.1 From VR Headsets to Smart Eyewear and Intra-ocular Lenses
  • 17.2 Contact Lens Sensor Architectures
  • 17.3 Contact Lens Display Architectures
  • 17.4 Smart Contact Lens Fabrication Techniques
  • 17.5 Smart Contact Lens Challenges
  • 18 Vergence-Accommodation Conflict Mitigation
  • 18.1 VAC Mismatch in Fixed-Focus Immersive Displays
  • 18.1.1 Focus rivalry and VAC
  • 18.2 Management of VAC for Comfortable 3D Visual Experience
  • 18.2.1 Stereo disparity and the horopter circle
  • 18.3 Arm's-Length Display Interactions
  • 18.4 Focus Tuning through Display or Lens Movement
  • 18.5 Focus Tuning with Micro-Lens Arrays
  • 18.6 Binary Focus Switch
  • 18.7 Varifocal and Multifocal Display Architectures
  • 18.8 Pin Light Arrays for NTE Display
  • 18.9 Retinal Scan Displays for NTE Display
  • 18.10 Light Field Displays
  • 18.11 Digital Holographic Displays for NTE Display
  • 19 Occlusions
  • 19.1 Hologram Occlusion
  • 19.2 Pixel Occlusion, or ""Hard-Edge Occlusion""
  • 19.3 Pixelated Dimming, or ""Soft-Edge Occlusion""
  • 20 Peripheral Display Architectures
  • 21 Vision Prescription Integration
  • 21.1 Refraction Correction for Audio-Only Smart Glasses
  • 21.2 Refraction Correction in VR Headsets
  • 21.3 Refraction Correction in Monocular Smart Eyewear
  • 21.4 Refraction Correction in Binocular AR Headsets
  • 21.5 Super Vision in See-Through Mode
  • 22 Sensor Fusion in MR Headsets
  • 22.1 Sensors for Spatial Mapping
  • 22.2.1 Stereo cameras
  • 22.2.2 Structured-light sensors
  • 22.2.3 Time-of-flight sensors
  • 22.3 Head Trackers and 6DOF
  • 22.4 Motion-to-Photon Latency and Late-Stage Reprojection
  • 22.5 SLAM and Spatial Anchors
  • 22.6 Eye, Gaze, Pupil, and Vergence Trackers
  • 22.7 Hand-Gesture Sensors
  • 22.8 Other Critical Hardware Requirements
  • Conclusion


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Product Details
  • ISBN-13: 9781510634336
  • Publisher: Spie Press
  • Publisher Imprint: Spie Press
  • Language: English
  • Series Title: Press Monographs
  • ISBN-10: 1510634339
  • Publisher Date: 30 Apr 2020
  • Binding: Paperback
  • No of Pages: 270
  • Weight: 323 gr


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