Multi-Image AR Display Using Polarization Selective Lens
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Solution Overview
Problem
Current augmented reality (AR) display systems face challenges in providing a wide angle of view while maintaining a compact size, as they are limited by the size and complexity of existing polarization selective lenses and screens.
Innovation Solution
A multi-image display apparatus incorporating a polarization selective lens and an anisotropic holographic screen that uses different diffusion central angles and polarization components to focus and transmit images without refraction, allowing for a wider angle of view and reduced size, utilizing geometric phase lenses and polarization conversion plates to manage polarization states effectively.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of substance
If conventional polarization selective lenses and screens are used in AR display systems, then the system can function, but the angle of view is limited and the device size increases
Solution Approach 1:
The patent changes the polarization state parameters of light using polarization conversion plates and selective lenses. By converting linearly polarized light to circularly polarized light and using polarization-selective focusing, the system achieves wider angle of view while maintaining compact size, directly addressing the contradiction between light loss and angle of view adaptability
2Reliability
If conventional polarization selective lenses are used, then the system can focus images, but the device size increases and complexity increases
Solution Approach 1:
The patent replaces conventional mechanical polarization selective lenses with a combination of polarization conversion plates and circularly polarized selective lenses. This substitution maintains reliable image focusing capability while reducing device size and simplifying the overall system structure by eliminating the need for complex conventional polarization selective optical elements
3Adaptability or versatility
If conventional AR display systems are designed, then they can provide basic functionality, but the angle of view remains limited
Solution Approach 1:
The patent introduces polarization state as an additional dimension for controlling light paths. By using polarization conversion plates to change the polarization state and polarization-selective lenses to focus based on polarization, the system achieves wider angle of view without increasing device size, effectively adding a new dimension to the optical design space
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 enables a more realistic AR experience with increased angle of view and reduced size, minimizing light loss and chromatic aberration, thus enhancing the display's effectiveness in augmented and mixed reality applications.
Implementation Method 1
a polarization selective lens configured to focus the first image having the first polarization component, and transmit the second image having the second polarization component without refraction
Implementation Method 2
a screen configured to reflect and diffuse the first image, and transmit the second image
Implementation Method 3
a screen configured to reflect and diffuse the first image
Implementation Method 4
an anisotropic holographic screen configured to reflect and diffuse light that is incident on the first surface at an angle, and transmit light incident on the second surface
Data Source
AI summary
Provided is a multi-image display apparatus including an image forming device configured to form a first image, a first polarization plate configured to transmit a first polarization component of the first image provided from the image forming device, a second polarization plate configured to transmit a second polarization component of a second image that is provided from a path different from the first image, the second polarization component being different from the first polarization component, a screen configured to reflect and diffuse the first image, and transmit the second image, and a polarization selective lens configured to focus the first image having the first polarization component, and transmit the second image having the second polarization component without refraction.