Head-Worn Eye Imaging Optics for Stray Light Control
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Solution Overview
Problem
Wearable computing systems face challenges in managing stray light, which degrades image quality and user experience in head-worn computing devices.
Innovation Solution
The implementation of optical modules with light traps and polarized light management systems in head-worn computing devices to redirect and absorb stray light, enhancing image contrast and clarity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If light traps and polarized light management systems are implemented, then image quality and contrast are improved, but device complexity increases
Solution Approach 1:
The optical system is divided into separate functional modules: light traps for stray light management, polarizing beam splitters for light separation, and distinct imaging paths. This segmentation allows each component to be optimized independently while managing overall system complexity through modular architecture.
Solution Approach 2:
Polarizing beam splitters serve as intermediary elements that separate light paths based on polarization states. These intermediaries enable precise control of light distribution to different sensors without requiring complex mechanical shutters or filters, thereby improving image quality while maintaining manageable system complexity.
2Manufacturing precision
If optical modules with light traps are used to redirect and absorb stray light, then image contrast is enhanced, but device volume increases
Solution Approach 1:
Light traps are integrated within the existing optical module structure, nesting the stray light management function inside the compact optical housing. This nesting approach allows the light traps to be positioned strategically without significantly increasing the overall device volume, while still achieving effective stray light absorption for improved image contrast.
3Illumination intensity
If polarized light management systems are implemented, then brightness control is improved, but manufacturing complexity increases
Solution Approach 1:
The system controls brightness by changing the polarization state parameters of light using polarizing beam splitters and wave plates, rather than requiring mechanical adjustment of light source intensity. This parameter-based control achieves precise brightness management while avoiding the manufacturing complexity of mechanical brightness adjustment mechanisms.
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
The solution effectively reduces stray light, resulting in improved image quality and user experience by maintaining high contrast and brightness in the displayed images.
Implementation Method 1
optical modules with light traps and polarized light management systems in head-worn computing devices to redirect and absorb stray light
Implementation Method 2
optical modules with light traps and polarized light management systems in head-worn computing devices
Data Source
AI summary
Aspects of the present invention relate to methods and systems for imaging, recognizing, and tracking of a user's eye that is wearing a HWC. Aspects further relate to the processing of images reflected from the user's eye and controlling displayed content in accordance therewith.