RGB Laser Beam Splitter for Elliptical Spot Homogenization
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Solution Overview
Problem
Semiconductor laser light sources in RGB three-color laser light source synthesis and beam splitting devices produce elliptical light spots, leading to reduced efficiency in light homogenization due to different divergence angles, necessitating beam expansion or complex structures to achieve uniform illumination.
Innovation Solution
The RGB three-color laser light source synthesis and beam splitting device employs a light source assembly with main and side light paths, utilizing light splitters, filters, and reflectors to transmit and reflect light rays in a way that expands the light paths uniformly to the homogenizer, eliminating the need for additional beam expanders.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If semiconductor laser light sources are used in RGB three-color laser light source synthesis and beam splitting devices, then the volume is small and luminous efficiency is high, but the light spot has an elliptical cross-section which deteriorates the use efficiency of the light homogenizer
Solution Approach 1:
The patent introduces a beam expansion optical system that expands the beam width in one direction (the direction where the ellipse is narrower) to transform the elliptical cross-section into a more uniform shape. This dimensional transformation allows the light homogenizer to work more effectively, improving the use efficiency of the light homogenizer while maintaining the high luminous efficiency of semiconductor laser light sources.
2Manufacturing precision
If a beam expander is added to perform unidirectional beam expansion operation on light rays, then uniformity of the system is improved, but the volume and cost of the entire system will be increased due to the complex structure of the beam expander
Solution Approach 1:
The patent integrates the beam expansion function into the existing optical system by combining beam expansion optical elements with the light synthesis and beam splitting components. Instead of adding a separate, complex beam expander, the beam expansion functionality is merged with the existing optical paths and components, thereby improving light distribution uniformity without significantly increasing system complexity, volume, or cost.
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 enhances the homogenization of light rays, improving the uniformity and efficiency of the light output without increasing system volume or cost, using a simple planar structure to achieve beam expansion and secondary homogenization.
Implementation Method 1
light splitters capable of transmitting a portion of the first light rays, a portion of the second light rays, and a portion of the third light rays, and reflecting remaining portion of the first light rays, remaining portion of the second light rays, and remaining portion of the third light rays
Implementation Method 2
light filters capable of transmitting one or two of the first light rays, the second light rays, and the third light rays and reflecting remainder of the first light rays, the second light rays, or the third light rays
Implementation Method 3
reflectors capable of reflecting the first light rays, the second light rays, and the third light rays; where the light splitters, the light filters, and/or the reflectors are capable of conducting the first light rays, the second light rays, and the third light rays to the first direction
Data Source
AI summary
The present application provides an RGB three-color laser light source synthesis and beam splitting device, including: a light source assembly including first light sources, a second light source, and a third light source; light splitters; light filters and/or reflectors, and light homogenizer. The light splitters, and the light filters and/or the reflectors are used in combination to perform multi-pass reflection and splitting on the light rays emitted from the light source assembly, so that multiple light rays are generated on the main light paths to realize the beam expansion. The first light rays, the second light rays, and the third light rays subjected to the beam expansion can be uniformly incident on the light homogenizer, and be subjected to secondary homogenization by the light homogenizer.