AR Display Combining Optics With Holographic Image Replication
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Solution Overview
Problem
Existing augmented reality display apparatuses face challenges in miniaturization while maintaining a wide viewing window, as they require precise alignment of the eye to focus correctly, and slight misalignment can lead to improper image viewing.
Innovation Solution
The use of a combining optical system incorporating multiple holographic optical elements that diffract and focus virtual images at different focal points, allowing for a wide viewing window by replicating images at various positions, thereby enlarging the viewing area without increasing the apparatus size.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If a conventional optical system is used in AR display apparatus, then the apparatus can be miniaturized, but the viewing window becomes narrow and requires precise eye alignment
Solution Approach 1:
The optical system is segmented into multiple independent optical paths, each with its own optical element (first, second, third optical elements). Each optical element processes a specific portion of the image and directs it to a different focal point, thereby dividing the viewing function into multiple segments that collectively provide a wider viewing window while maintaining compact apparatus size.
2Measurement precision
If the eye position is slightly out of the focus position, then the image cannot be properly viewed, requiring very small focal size
Solution Approach 1:
The system creates multiple copies of the same image through different optical paths and optical elements. Each optical element generates a replicated image at a different focal point corresponding to different eye positions. This copying approach allows the user to view the image properly even when the eye position is slightly out of the original focus position, as another copied image will be in focus for that position.
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 approach enables a miniaturized display apparatus with a wide viewing window, ensuring clear image visibility from multiple focal points, enhancing the AR experience by allowing for simultaneous observation of virtual and real-world elements.
Implementation Method 1
a first surface configured to diffract incident light and form a focused image
Data Source
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Figure 3A~3B
AI summary
Provided a display apparatus including an image forming apparatus configured to form an image, a projection optical system configured to project the image formed by the image forming apparatus, and a combining optical system configured to provide the image projected from the projection optical system combined with light emitted from an external landscape, wherein the combining optical system is configured to divide the image projected from the projection optical system into same images and focus the same images on different positions.