Variable Aperture for Electromagnetic Radiation via Electrostatic Liquid Metal
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Solution Overview
Problem
Current systems for controlling electromagnetic radiation, such as X-ray and gamma-ray beams, lack dynamic and variable control over propagation direction, location, size, shape, intensity, and dynamic range, limiting their precision and efficiency in applications like medical imaging and non-destructive testing.
Innovation Solution
A variable aperture system comprising substrates with an attenuation fluid and electrostatically controlled displacing electrodes, which change the size and shape of an open aperture in the fluid layer to control electromagnetic radiation, allowing for dynamic adjustment of beam characteristics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If traditional collimators and filters are used to control electromagnetic radiation, then radiation propagation direction and intensity can be controlled, but the control is static and lacks dynamic adjustability
Solution Approach 1:
The patent transforms the static aperture structure into a dynamic one by using electrostatically controlled liquid metal. The liquid metal's position and shape can be changed in real-time by applying different voltages to the electrodes, enabling dynamic adjustment of the aperture size and shape without mechanical moving parts. This resolves the contradiction by providing adaptability through electrical control while avoiding complex mechanical mechanisms.
Solution Approach 2:
The patent changes the physical state and position of the liquid metal aperture by varying electrical parameters (voltage, charge). By controlling the electrostatic force between charged electrodes and the liquid metal, the aperture dimensions and shape can be continuously adjusted. This parameter-based control provides dynamic versatility without requiring complex mechanical or optical systems.
2Use of energy by moving object
If larger aperture is used to allow more radiation through, then signal intensity improves, but unnecessary radiation exposure increases
Solution Approach 1:
The liquid metal aperture enables local control of radiation transmission by creating precisely defined open regions with specific shapes and sizes. The electrostatic control allows the aperture to be shaped exactly to the required field-of-view, permitting maximum signal intensity in the desired direction while blocking radiation in all other directions. This resolves the contradiction by optimizing the local transmission properties rather than using a simple large or small circular aperture.
Solution Approach 2:
The dynamic nature of the liquid metal aperture allows real-time optimization of the aperture size and shape based on the specific imaging or detection requirements. The system can adjust the aperture to be as large as needed for sufficient signal intensity while precisely confining the radiation beam to only the necessary area, thereby maximizing signal while minimizing unnecessary exposure.
3Manufacturing precision
If variable aperture control is implemented, then beam precision and image quality improve, but device complexity and manufacturing difficulty increase
Solution Approach 1:
The patent replaces traditional mechanical aperture mechanisms (moving parts, adjustable shutters, mechanical lenses) with an electrostatically controlled liquid metal system. This substitution eliminates complex mechanical fabrication and assembly requirements while providing precise and dynamic beam control. The liquid metal can be charged and positioned using standard electrostatic techniques, simplifying the manufacturing process compared to precision mechanical systems.
Solution Approach 2:
The liquid metal acts as an intermediary between the electrostatic control system and the electromagnetic radiation. Rather than directly controlling radiation with complex optical or mechanical components, the system uses the liquid metal's response to electrostatic fields as a mediating mechanism. This intermediary approach simplifies the overall system while achieving precise beam control through the liquid metal's adjustable position and shape.
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
Enables precise control over the location, size, and shape of electromagnetic radiation beams, reducing unnecessary radiation exposure, improving image quality, and facilitating real-time collimation and dose control, aligning with ALARA principles and enhancing imaging performance.
Implementation Method 1
An attenuation fluid is located in the gap between the first substrate and the second substrate. The attenuation fluid at least partially absorbs electromagnetic radiation in a predetermined wavelength range.
Implementation Method 2
At least one charging electrode is in electrical contact with the attenuation fluid. At least one displacing electrode is located on a surface of the first substrate facing the gap or on a surface of the second substrate facing the gap.
Implementation Method 3
The controller is configured to provide the displacing electrode with an electrical charge that displaces the mercury layer from at least a portion of the gap by electrostatic force between the displacing electrode and the mercury layer.
Data Source
AI summary
An apparatus comprising a variable aperture for controlling electromagnetic radiation and related systems and methods are described. In one aspect, a variable aperture to control electromagnetic radiation comprises a first substrate, a second substrate, an attenuation fluid, at least one charging electrode, and at least one displacing electrode. The second substrate is located opposite the first substrate and spaced apart from the first substrate to form a gap between the first substrate and the second substrate. The attenuation fluid is located in the gap and configured to absorb electromagnetic radiation of a predetermined wavelength. The at least one charging electrode is in electrical contact with the attentional fluid. The at least one displacing electrode is located on a surface of the first substrate facing the gap or on a surface of the second substrate facing the gap.