Compact Optical Assembly With Multi-Axis Lens Positioning
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Solution Overview
Problem
Current augmented reality, virtual reality, and mixed reality devices are hindered by large and bulky optical assemblies, limiting their portability and user comfort.
Innovation Solution
An optical system featuring a light source, a fixed portion, an optical assembly with a first and second optical element, and a driving assembly that allows the second optical element to move relative to the first along different axes, utilizing guiding and buffering assemblies for precise movement and a locking assembly for secure positioning, enabling miniaturization and improved user experience.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If traditional optical projection technology is used for AR, then virtual content can be delivered to users, but the optical assembly becomes large and bulky
Solution Approach 1:
The optical assembly is divided into multiple discrete optical elements (first optical element, second optical element, third optical element) that can be independently positioned and adjusted. This segmentation allows each element to be optimized for its specific function while reducing the overall volume of the optical assembly compared to traditional monolithic designs.
Solution Approach 2:
The patent positions multiple optical elements in a compact, nested arrangement where the first, second, and third optical elements are disposed in close proximity to each other along the optical path. This nesting approach allows the optical system to achieve the required optical path length and focusing capabilities while minimizing the external dimensions of the optical assembly.
2Volume of moving object
If optical elements are positioned closely to miniaturize the system, then device size is reduced, but precise positioning and stabilization become more difficult
Solution Approach 1:
The patent introduces a dynamic adjustment mechanism that allows the second optical element to move relative to the first and third optical elements along a first axis, and the third optical element to move relative to the first and second optical elements along a second axis. This dynamic positioning capability enables real-time compensation for manufacturing tolerances and maintains precise optical alignment despite the compact size of the assembly.
Solution Approach 2:
The patent employs sensors to detect the positions of the optical elements and uses this feedback information to adjust the positioning of the movable optical elements. This closed-loop control system ensures that the optical elements maintain their precise relative positions despite vibrations, thermal expansion, or manufacturing variations, which is particularly critical in the miniaturized optical assembly.
Data Source
AI summary
An optical system is provided. The optical system includes a light source used for generating light, a fixed portion, an optical assembly having an equivalent focal length to the light and including a first optical element and a second optical element, and a driving assembly used for driving the second optical element to move relative to the first optical element. The driving assembly includes a first driving element used for driving the second optical element to move relative to the first optical element in a first axis, and a second driving element used for driving the second optical element to move relative to the first optical element in a second axis. The first axis and the second axis are different.