Orthogonal Polarization Ocular Optical System for Compact 3D Viewing
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional 3D head-mount displays require complex interpupillary and diopter adjustments, are not suitable for users wearing glasses, and face challenges in downsizing while maintaining image quality due to issues like vignetting and ghost images.
Innovation Solution
An ocular optical system with a configuration of a first polarization member, a mirror, and a second polarization member, where the polarized states of the first and second members are orthogonal, allowing light beams to be reflected and transmitted effectively without ghost images, enabling a downsized design that eliminates the need for interpupillary adjustment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the image display device is downsized to avoid interference between right and left ocular optical systems, then the device size is reduced, but the focal length must be shortened and lens curvature decreased, requiring more lenses which increases system size and weight
Solution Approach 1:
The patent combines multiple optical functions (beam splitting, polarization control, and image display) into an integrated ocular optical system. The beam splitting unit and polarization members are merged with the image display device, allowing the system to achieve compact size without requiring separate adjustment mechanisms for interpupillary distance and diopter, thus reducing overall device complexity while maintaining downsizing benefits
Solution Approach 2:
The ocular optical system is designed to perform multiple functions simultaneously: displaying images, controlling polarization states, and adapting to different user configurations (with or without glasses). The beam splitting unit serves both to separate light paths for right and left eyes and to enable the system to function as a universal viewer that accommodates various interpupillary distances and diopter requirements without additional adjustment mechanisms
2Ease of operation
If conventional HMD configuration is used with fixed eye and ocular optical system positions, then head-mount system is achieved, but the system cannot be used by users wearing eyeglasses and requires diopter adjustment
Solution Approach 1:
The patent introduces dynamic adjustability to the ocular optical system. The diopter adjustment unit allows the focal point to be dynamically changed to accommodate users with different visual requirements and those wearing eyeglasses. This dynamic capability enables the fixed head-mount system to adapt to various user conditions without requiring physical repositioning of the eye or optical system
3Reliability
If interpupillary adjustment is required to prevent vignetting, then image quality is maintained, but the adjustment process becomes complicated and time-consuming
Solution Approach 1:
The patent incorporates preliminary design features that eliminate the need for complex interpupillary adjustment. The beam splitting unit and polarization members are pre-configured to provide a wide eye box that accommodates various interpupillary distances. This preliminary design ensures that users can achieve proper image observation without performing complicated adjustment operations
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
This configuration provides a higher-quality image without the need for interpupillary adjustment and allows for a downsized optical system that can be used by individuals wearing glasses, enhancing usability and image clarity.
Implementation Method 1
a first polarization member; a mirror; a second polarization member; and an image display device in this order, wherein a polarized state in the first polarization member and a polarized state in the second polarization member are orthogonal to each other
Implementation Method 2
a first polarization member; a mirror; a second polarization member
Data Source
AI summary
The purpose is to provide a higher-quality three-dimensional image with a downsized optical system that does not need interpupillary adjustment. An ocular optical system according to the present disclosure includes, on an optical path viewed from an observer side, at least: a first polarization member; a mirror; a second polarization member; and an image display device in this order. A polarized state in the first polarization member and a polarized state in the second polarization member are orthogonal to each other.