AR Optical Device Reducing Chromatic Aberration
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Solution Overview
Problem
Augmented reality optical devices face challenges in maintaining image quality due to chromatic aberration caused by convex lenses with short focal lengths, which also lead to increased device size and complexity.
Innovation Solution
The optical device incorporates a lens with a first and second curved surface, a convex lens, and reflectors with concave curved surfaces to refract and reflect light, reducing the optical path and minimizing chromatic aberration effects while maintaining image quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If a convex lens with a short focal length is used to reduce the optical path, then the device size is reduced, but image quality deteriorates due to chromatic aberration
Solution Approach 1:
The optical system is divided into multiple components: a first lens, a convex lens, and a second lens. Each lens has specific curvature requirements that work together to reduce chromatic aberration while maintaining a compact optical path. The first lens has a first curvature, the second lens has a second curvature, and together they compensate for the chromatic aberration introduced by the convex lens.
Solution Approach 2:
The patent specifies precise curvature parameters for each lens element. The first lens has a curvature of 0.005 to 0.02 mm⁻¹, the second lens has a curvature of 0.005 to 0.02 mm⁻¹, and the convex lens has a curvature of 0.02 to 0.05 mm⁻¹. By carefully controlling these parameter ranges, the system achieves both compact size and high image quality.
2Manufacturing precision
If multiple optical members are used to maintain image quality, then image quality is preserved, but device complexity and size increase
Solution Approach 1:
Multiple lens elements are combined into a single integrated optical assembly. The first lens, convex lens, and second lens are positioned in sequence with specific spacing relationships, creating a unified optical system that maintains image quality while managing complexity through coordinated design rather than separate components.
Solution Approach 2:
The patent utilizes curved surfaces with specific radii for each lens element. The first lens has a first curved surface with a first curvature, the second lens has a second curved surface with a second curvature, and the convex lens has a curved surface with a third curvature. These curved surfaces are essential for controlling light paths and reducing chromatic aberration.
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 allows for a compact optical device design that prevents image quality degradation from chromatic aberration, enabling effective augmented reality display without the need for reducing the focal length of the convex lens.
Implementation Method 1
a convex lens disposed between the first side surface of the lens and the display device
Implementation Method 2
a reflector disposed on the first curved surface of the first lens portion of the lens, the reflector configured to reflect light of the display device refracted by the convex lens toward a user's eye
Data Source
AI summary
An optical device includes: a lens including a first lens portion having a first curved surface with a first curvature and a second lens portion having a second curved surface corresponding to the first curved surface; a display device disposed on a first side surface of the lens; a convex lens disposed between the first side surface of the lens and the display device; and a reflector disposed on the first curved surface of the first lens portion of the lens, the reflector configured to reflect light of the display device refracted by the convex lens toward a user's eye.