Laser Light Source With Reflector Groups For High Power Density
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Solution Overview
Problem
Conventional semiconductor laser arrays face challenges in achieving high light power density and compact size due to the elliptical Gaussian light distribution and large divergence angles, which limit the packing density and efficiency of laser light spots.
Innovation Solution
A light source system with two laser groups and corresponding reflector groups, where the light beams from each group are parallel and overlapping, allowing for reduced spacing between light beams through the use of reflectors, thereby increasing light power density and reducing the volume of the optical system.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If conventional planar arrangement with collimating lenses is used, then light beams can be collimated, but light power density cannot be increased due to large gaps between light spots
Solution Approach 1:
The patent transitions from a conventional planar two-dimensional array arrangement to a three-dimensional spatial arrangement using reflectors. Lasers are mounted on the top surface of the base rather than being planarly arranged, allowing light beams to be reflected and redirected in three-dimensional space. This enables tight packing of light spots while maintaining collimation, resolving the contradiction between light power density and projected area.
2Illumination intensity
If lasers are densely packed on base, then light power density should increase, but large gaps form between light spots due to elliptical Gaussian distribution
Solution Approach 1:
The patent introduces reflectors as intermediary elements between the lasers and the final light output. The reflectors receive the elliptical Gaussian light beams from the lasers and redirect them to form tightly packed circular light spots. This intermediary component transforms the problematic elliptical distribution into a desirable compact circular pattern, enabling high light power density without increasing arrangement complexity.
3Illumination intensity
If focusing lenses are used to focus light beams into one light spot, then light power density increases, but light beams become divergent which is disadvantageous for downstream optical systems
Solution Approach 1:
The patent segments the optical function into two separate components: collimation and focusing. The reflectors perform the collimation function by redirecting light beams to be parallel, while the tight packing of light spots achieves the focusing effect without compromising beam parallelism. This segmentation of functions allows both high light power density and good beam parallelism to be achieved simultaneously, unlike using a single focusing lens which compromises parallelism.
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 solution effectively increases light power density and reduces the volume of the optical system by allowing for tighter packing of laser light spots, overcoming the limitations of conventional technologies.
Implementation Method 1
two reflector groups corresponding to the two laser groups, at least one reflector group including at least two reflectors, each reflector being disposed on the optical axis of a corresponding laser, each reflector group reflecting the light beams generated by the corresponding laser group
Data Source
Figure 1a~1b
Figure 2
Figure 3
AI summary
Disclosed are a light source system and a laser light source (300). The laser light source includes two groups of laser groups (20a, 20b), wherein at least one group of laser groups includes at least two lasers (21a, 21b, 21c, 21d), and the light beams (L1) generated by the two groups of laser groups are in the same direction and parallel to each other. The first projections of the two groups of laser groups on the cross section of the light beams formed by the respective emergent light rays thereof are partially overlapped with the second projections in a first direction, which first direction is the connection direction of at least two laser centres of a group of laser groups. The laser light source has the effects of being able to effectively increase the light power density and at the same time reduce the volume of the light source.