Light Emitting Device Lens Chromatic Aberration Control
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Solution Overview
Problem
Existing light emitting devices face challenges in accurately controlling the emission of light from multiple light emitting elements, leading to inefficiencies and potential chromatic aberration due to the alignment and positioning of light sources.
Innovation Solution
A light emitting device design that includes a lens member, a submount with specifically arranged light emitting elements of different wavelengths, where the light emission points are strategically positioned to pass through a single lens surface, allowing for accurate control of light emission and reduction of chromatic aberration without the need for additional optical parts.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If multiple light emitting elements are mounted in a package, then the device size is reduced, but the light emission position control accuracy deteriorates
Solution Approach 1:
The submount is designed with a specific geometric shape (parallelogram, rectangle, or triangle) where the outer edge passes through a carefully calculated point between the first and second planes. This local geometric configuration ensures that light from multiple emitting elements at different wavelengths passes through a single lens surface at controlled positions, achieving both compact size and precise emission control
Solution Approach 2:
The patent uses a top view projection approach, defining planes and lines in three-dimensional space to precisely control the apparent positions of light emission points. By projecting the light emission points onto a two-dimensional plane and controlling their relative positions, the patent achieves accurate optical alignment while maintaining a compact three-dimensional structure
2Object-generated harmful factors
If light emitting elements of different wavelengths are positioned at different distances from the lens, then chromatic aberration occurs, but the patent reduces chromatic aberration without additional optical parts
Solution Approach 1:
The patent changes the geometric parameters of the submount (shape, size, and orientation) to control the positions of light emitting elements. By adjusting these parameters, the patent ensures that despite different wavelengths requiring different focal distances, all light paths converge through a single lens surface at controlled positions, reducing chromatic aberration without adding corrective optical elements
Solution Approach 2:
The patent separates the light emitting elements in space, arranging them at different positions on the submount. This spatial segmentation allows each wavelength to have its own optimized path to the lens surface, reducing chromatic aberration through geometric arrangement rather than additional optical components
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 device achieves precise light emission control, reducing chromatic aberration and optimizing the optical path lengths of different colors, thereby enhancing the performance and compactness of the light emitting device.
Implementation Method 1
The first light and the second light pass through the at least one lens surface
Data Source
AI summary
A light emitting device includes: a lens member having at least one lens surface; a submount; and a plurality of light emitting elements arranged in a row on an upper face of the submount, including a first light emitting element configured to emit first light having an emission peak at a first wavelength and a second light emitting element configured to emit second light having an emission peak at a second wavelength from a second light emission point, the second wavelength being different from the first wavelength, and the second light emission point being located farther from the lens member than a first plane that is perpendicular to an optical axis of the lens surface and that passes through the first light emission point.