Asymmetric Optical Lens for High NA Light Coupling
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Solution Overview
Problem
Existing light devices face challenges in achieving high light coupling efficiency, particularly with high numerical aperture (NA) systems, where aberration losses lead to decreased efficiency.
Innovation Solution
A light device featuring an optical lens with an incidence plane having a convex portion along one axis and a concave portion along a perpendicular axis, converting incident light into parallel light, which enhances light coupling efficiency by reducing aberration-related losses.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If a high NA optical system is used to achieve high light coupling efficiency, then the light coupling efficiency is improved, but aberration losses increase causing efficiency to decrease
Solution Approach 1:
The patent applies local quality by creating asymmetric surface profiles (convex and concave portions) at specific locations on the lens surfaces. These localized structural modifications are designed to correct aberrations in specific regions of the optical path, allowing the system to maintain high NA while reducing aberration losses and improving overall light coupling efficiency.
Solution Approach 2:
The patent employs asymmetry by introducing convex and concave portions that break the rotational symmetry of the lens. This asymmetric design allows differential correction of aberrations in different angular regions of the optical path, enabling the system to achieve high coupling efficiency by compensating for direction-dependent losses that occur in high NA systems.
2Shape
If conventional optical lenses are used to convert elliptical beams to circular beams, then beam shaping is achieved, but light coupling efficiency remains insufficient
Solution Approach 1:
The patent uses local quality by implementing specific convex and concave surface portions at strategic locations on the lens. These localized structural features are designed to selectively modify light paths for different input beam shapes, enabling efficient conversion from elliptical to circular beams while minimizing coupling losses through precision-engineered surface profiles.
Solution Approach 2:
The patent applies parameter changes by systematically varying the curvature, position, and dimensions of convex and concave portions on the lens surfaces. By optimizing these geometric parameters, the lens can adapt to different input beam characteristics (elliptical, circular, different NA values) and achieve maximum coupling efficiency for each case through precise control of light transformation parameters.
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 lens design improves light coupling efficiency by converting elliptical beams into circular parallel beams, reducing optical losses and increasing the efficiency of light transfer, especially in high NA systems.
Implementation Method 1
The optical lens converts incident light emitted from the light source and incident on the incidence plane into parallel light and emits the parallel light from the emission plane
Data Source
AI summary
A light device according to one embodiment includes a light source and an optical lens having an incidence plane extending in both a first axis and a second axis intersecting the first axis and an emission plane extending in both the first axis and the second axis. The optical lens converts incident light emitted from the light source and incident on the incidence plane into parallel light and emits the parallel light from the emission plane, and the incidence plane has a convex portion provided in a first direction in which the first axis extends and a concave portion provided in a second direction in which the second axis extends.