Movable Optical Assembly for AR Focus Adjustment
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Solution Overview
Problem
Current Augmented Reality (AR) devices struggle to ensure that the generated virtual image matches the focus of the user's eyes, leading to suboptimal AR experiences.
Innovation Solution
An optical system comprising a fixed portion and a first optical assembly with a movable portion holding an optical element, driven by a driving assembly, allowing the image to be projected and focused correctly on the user's eyes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a fixed optical system is used, then the structure is simple, but the image focus cannot be adjusted to match user's eye focus
Solution Approach 1:
The patent makes the optical element movable relative to the frame by introducing a driving assembly with movable portion and fixed portion. This dynamic structure allows the optical element to adjust its position along the optical axis, enabling focus adjustment to match different users' eye focus while maintaining a relatively simple overall structure through controlled motion rather than complex fixed components
2Manufacturing precision
If the optical element is made movable to adjust focus, then the focus matching precision is improved, but the device complexity increases
Solution Approach 1:
The patent divides the optical system into distinct functional modules: a frame holding optical elements, a movable portion holding the adjustable optical element, and a driving assembly with separate movable and fixed portions. This segmentation allows each component to be optimized independently while working together to achieve precise focus adjustment without requiring the entire system to be complex
Solution Approach 2:
The patent introduces a driving assembly as an intermediary mechanism between the fixed frame and the movable optical element. This intermediary contains both fixed and movable portions that work together to provide controlled adjustment, reducing the complexity that would otherwise be required in a direct connection system
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 optical system effectively adjusts the focus of the image to match the user's eye alignment, enhancing the AR experience by ensuring clear and aligned virtual and real-world imagery.
Implementation Method 1
The first optical element includes lens. The first optical element is used for allow the image to pass through.
Implementation Method 2
The second optical element includes lens. The second optical element is used for allow light to pass through.
Implementation Method 3
The third optical element includes lens. The third optical element is used for allow the image to pass through. The third optical element includes a light filter to block light with certain wavelengths.
Implementation Method 4
The third optical element includes a light filter to block light with certain wavelengths.
Implementation Method 5
the optical system further including a reflect element disposed on the fixed portion, used for reflecting the image to the first optical element
Data Source
AI summary
An optical system is provided. The optical system includes a fixed portion and a first optical assembly. The first optical assembly includes a first movable portion used for holding a first optical element, and a first driving assembly used for driving the first movable portion to move relative to the fixed portion. The fixed portion includes a first frame used for holding a second optical element, the first movable portion is movable relative to the fixed portion, and an image is projected to the second optical element.