Convex Hyperbolic Near-Field Lens for Optical Efficiency
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Solution Overview
Problem
Current near-field lens designs in portable lighting devices have relatively low optical efficiency, necessitating an enhancement in this area.
Innovation Solution
A near-field lens with a convex hyperbolic surface configuration that collimates light internally towards an output surface, achieving high internal reflection rates, thereby improving optical efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If conventional near-field lens designs are used, then the device structure is simple, but the optical efficiency is low
Solution Approach 1:
The patent applies a convex hyperbolic curved surface configuration instead of conventional flat or simple curved surfaces. The hyperbolic curvature is specifically designed to collimate light rays from the LED source, directing them parallel to the optical axis. This curved surface geometry optimizes light collection and redirection, significantly improving optical efficiency by reducing light loss while maintaining a relatively simple single-surface lens structure.
2Illumination intensity
If the convex hyperbolic surface is used to collimate light, then the light output is more focused and brighter, but the manufacturing precision requirements increase
Solution Approach 1:
The patent specifies particular parameter ranges for the hyperbolic surface to optimize the balance between performance and manufacturability. The curvature radius is defined as 0.5mm to 2.0mm, and the surface follows a hyperbolic function with specific coefficients. These parameter ranges were selected to achieve effective light collimation and brightness enhancement while remaining within achievable manufacturing tolerances for injection molding processes.
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 convex hyperbolic surface design significantly enhances light collection and collimation, resulting in improved optical efficiency and a brighter, more focused light output for portable lighting applications.
Implementation Method 1
the convexhyperbolic surface is configured to substantially collimate light towards the lateral surface to be internally reflected towards the output surface
Implementation Method 2
the focusingsurface is configured to collimate light along the optical axis towards the output surface
Data Source
AI summary
A near-field lens is provided. The lens includes a lens body positioned about an optical axis. The lens body includes an input surface for receiving light from a light source and defined by a focusing surface and a convex hyperbolic surface. The lens body also includes an output surface through which light exits the lens body and a lateral surface extending between the convex hyperbolic surface and the output surface. The focusing surface is configured to collimate light along the optical axis towards the output surface and the convex hyperbolic surface is configured to substantially collimate light towards the lateral surface to be internally reflected towards the output surface.