Receiver Reflector Assembly for Gaussian Beam Homogenization
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Solution Overview
Problem
Power beaming systems face challenges in accurately targeting receivers and avoiding hazards due to the flexible nature of free-space power beaming, which can result in inefficient power conversion and safety issues, particularly with Gaussian power beams having non-uniform intensity profiles.
Innovation Solution
The implementation of a power receiver with input optics that utilize a set of reflection surfaces to shift portions of the power beam away from the center, converting a substantially round or Gaussian power beam into a super-Gaussian or polygonal beam, thereby flattening the intensity profile and improving power conversion efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a Gaussian power beam is used for free-space power beaming, then the beam can be transmitted flexibly through atmosphere, but the non-uniform intensity profile results in inefficient power conversion
Solution Approach 1:
The patent divides the Gaussian beam into multiple segments using a segmented beam splitter, which separates the beam into multiple sub-beams with different intensity distributions. This segmentation allows the non-uniform Gaussian profile to be redistributed across the receiver surface, improving power conversion efficiency while maintaining the flexibility of free-space transmission.
Solution Approach 2:
The patent introduces asymmetric optical elements, specifically a tilted beam splitter and asymmetric diffuser, to transform the symmetric Gaussian intensity profile into an asymmetric distribution that better matches the receiver's optimal illumination pattern. This asymmetry enables more uniform power distribution across the receiver surface, resolving the efficiency problem while preserving transmission flexibility.
2Power
If a Gaussian power beam with high intensity at the center is used, then power can be transmitted effectively, but high-intensity areas create safety hazards and increase losses
Solution Approach 1:
The patent applies partial action by using a beam splitter that directs only a portion of the high-intensity central beam to the receiver, while the remaining light is diverted or diffused. This reduces the peak intensity at any single location on the receiver, mitigating safety hazards and thermal losses while still delivering sufficient total power for effective transmission.
Solution Approach 2:
The patent introduces an asymmetric diffuser as an intermediary element between the beam splitter and the receiver. This diffuser scatters the concentrated high-intensity light into a more distributed pattern, acting as a mediator that reduces peak intensities and associated safety risks while maintaining overall power delivery effectiveness.
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 solution enhances the efficiency of power conversion by distributing power more uniformly across the receiver's surface, reducing losses and improving safety by minimizing high-intensity areas, thus optimizing the power beaming process.
Implementation Method 1
The input optics include a first set of reflection surfaces configured to shift a first portion of the substantially round power beam away from the center, and a second set of reflection surfaces configured to shift a second portion of the substantially round power beam away from the center
Implementation Method 2
a power conversion structure positioned to receive an incoming power beam and configured to convert at least a portion of the incoming power beam to electricity
Data Source
AI summary
A reflector assembly at a power beam receiver includes at least two sets of reflection surfaces positioned to shift some incoming light away from the center of the beam and towards the periphery. These surfaces may be positioned obliquely to one another, for example orthogonally. By shifting a portion of the power beam away from a higher-intensity center and toward a lower-intensity periphery, the reflector assembly may improve receiver efficiency without substantial redirection of power outside of a power-collecting surface of the receiver.