Reverse Pass-Through Glasses for 3D Face Visibility in AR/VR

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Solution Overview

Problem

Existing AR and VR devices lack the ability for onlookers to accurately perceive the user's facial features and focus of attention, leading to disconnection and potential hazards in interactions.

Innovation Solution

Implementing a reverse pass-through feature using a light field display and eye imaging system to provide an autostereoscopic view of the user's face, allowing for a realistic and three-dimensional reconstruction of facial features to onlookers.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If a display device is integrated into eyeglass frames, then the device can be worn comfortably during extended periods, but the device complexity and manufacturing difficulty increase

Engineering Contradiction:

ImprovewearabilityVSAvoiddevice complexity

Core Design Contradiction:

Ease of operationVSDevice complexity

Solution Approach 1:

The display device is divided into multiple independent components: a first lens assembly with a first display device for virtual reality, and a second lens assembly with a second display device for augmented reality. Each lens assembly can be independently manufactured, tested, and replaced, reducing overall device complexity while maintaining wearability.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The eyeglass frames are designed to accommodate both virtual reality and augmented reality display devices simultaneously through the dual lens assembly configuration. This multi-functional design allows a single pair of glasses to serve multiple purposes, reducing the need for separate devices.

Inventive Principle:

Principle #6Universality (Multi-functionality)

2Ease of operation

If a display device is integrated into eyeglass frames, then the device can be worn comfortably during extended periods, but the ease of manufacture decreases

Engineering Contradiction:

ImprovewearabilityVSAvoidease of manufacture

Core Design Contradiction:

Ease of operationVSEase of manufacture

Solution Approach 1:

Inventive Principle:

Principle #1Segmentation

3Adaptability or versatility

If reverse pass-through lenses are used to allow natural vision, then the user experience is improved, but the manufacturing precision requirements increase

Engineering Contradiction:

Improvenatural vision capabilityVSAvoidlens manufacturing precision

Core Design Contradiction:

Adaptability or versatilityVSManufacturing precision

Solution Approach 1:

The reverse pass-through lenses are designed with specific optical properties only in the peripheral regions where natural vision occurs. The central regions maintain standard optical characteristics for display viewing. This localized differentiation reduces overall manufacturing precision requirements while enabling natural vision capability.

Inventive Principle:

Principle #3Local quality

Applied Scientific Principles

This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.

Function Achieved in This Case

Enhances user interaction by providing a natural and immersive experience, enabling better engagement with the surrounding environment and improving safety by allowing onlookers to understand the user's focus and attention.

Implementation Method 1

a first lens assembly with a first display device integrated therein to facilitate viewing with a first eye

Methodology Applied

Scientific EffectLight transmission: Light

Implementation Method 2

a second lens assembly with a second display device integrated therein to facilitate viewing with a second eye

Methodology Applied

Scientific EffectLight transmission: Light

Implementation Method 3

reverse pass-through lenses that facilitate natural vision

Methodology Applied

Scientific EffectLight transmission: Light

Data Source

PatentEP4104003B1Reverse pass-through glasses for augmented reality and virtual reality devices

Publication Date: 2026.05.13 META PLATFORMS TECHNOLOGIES LLC

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AI summary

A device for providing a reverse pass-through view of a user of a headset display to an onlooker includes an eyepiece comprising an optical surface configured to provide an image to a user on a first side of the optical surface. The device also includes a first camera configured to collect an image of a portion of a face of the user reflected from the optical surface in a first field of view, a display adjacent to the optical surface and configured to project forward an image of the face of the user, and a screen configured to receive light from the display and provide the image of the face of the user to an onlooker.