3D-Printed GRIN Lens With Dielectric Gradient Control
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Solution Overview
Problem
Current methods for manufacturing millimeter wave or optical devices, such as GRIN lenses, are energy-consuming and time-consuming, and often require expensive materials like coaxial cables, limiting their widespread adoption in communication systems.
Innovation Solution
The use of additive manufacturing processes, like 3D printing, to create gradient-index (GRIN) lenses with controlled dielectric constants and refractive indices, allowing for the production of lenses with customized optical performance and shapes using a combination of dielectric materials, such as photo-reactive resin and air, to efficiently focus electromagnetic waves.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional fabrication methods (bulk machining, precision molding) are used to manufacture GRIN lenses, then manufacturing precision and optical performance are improved, but production time and energy consumption increase significantly
Solution Approach 1:
The patent changes the fundamental manufacturing parameter from subtractive machining or molding to additive manufacturing. This allows the GRIN lens to be built layer-by-layer with precise control over dielectric constant distribution, achieving optical performance while dramatically reducing production time and energy consumption compared to conventional methods
Solution Approach 2:
The patent uses composite materials consisting of dielectric material particles suspended in a polymer matrix. By controlling the volume fraction and distribution of these particles during additive manufacturing, the lens achieves the required gradient index profile with excellent optical performance while maintaining fast production speeds
2Manufacturing precision
If conventional GRIN lens fabrication methods are used, then optical performance is improved, but manufacturing cost and complexity increase
Solution Approach 1:
The patent simplifies manufacturing by changing from multi-step conventional processes (neutron irradiation, chemical vapor deposition, ion exchange) to a single additive manufacturing process. The gradient index profile is achieved directly during printing by controlling material deposition, eliminating the need for complex post-processing steps and reducing overall manufacturing complexity
Solution Approach 2:
The patent applies local quality by varying the dielectric constant at different spatial locations within the lens during additive manufacturing. The extrusion path, layer thickness, and material composition are locally adjusted to create the desired gradient index profile, achieving high optical performance with a relatively simple manufacturing process
3Reliability
If coaxial cables are used for millimeter wave transmission, then signal carrying capability is improved, but system cost increases significantly
Solution Approach 1:
The patent replaces expensive coaxial cables with a cost-effective alternative: GRIN lenses fabricated through additive manufacturing using inexpensive dielectric materials. The lenses provide the necessary signal focusing and transmission capabilities at a fraction of the cost of coaxial cable systems, making millimeter wave communication more economically viable
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 approach enables the rapid and cost-effective fabrication of GRIN lenses with improved optical performance, reduced energy consumption, and flexibility in design, enhancing the capabilities of millimeter wave communication systems.
Implementation Method 1
generating, with the manufacturing device by an additive manufacturing process, the GRIN lens based on the model
Implementation Method 2
lens with independently controlled optical performance and physical shape, as printed by a 3D printer
Implementation Method 3
the at least one layer of the plurality of layers has a dielectric profile that is made up of a plurality of different effective dielectric constants of the volume elements in the layer
Data Source
AI summary
Techniques are described for forming a gradient index (GRIN) lens for propagating an electromagnetic wave comprising receiving, by a manufacturing device having one or more processors, a model comprising data specifying a plurality of layers, wherein at least one layer of the plurality of layers comprises an arrangement of one or more volume elements comprising a first dielectric material and a second dielectric material, wherein the at least one layer of the plurality of layers has a dielectric profile that is made up of a plurality of different effective dielectric constants of the volume elements in the layer, and generating, with the manufacturing device by an additive manufacturing process, the GRIN lens based on the model.