Field-Adjusting Structure With Transformation Medium For Extended Depth Of Field
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Solution Overview
Problem
Current transformation optics devices face limitations in achieving an extended depth of field for electromagnetic waves, which restricts their ability to focus and adjust electromagnetic fields effectively across varying spatial regions.
Innovation Solution
The implementation of a field-adjusting structure with a transformation medium that applies a coordinate transformation, such as spatial dilation, to extend the depth of field beyond the nominal depth, allowing for a greater range of electromagnetic energy convergence and adjustment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of stationary object
If a conventional focusing structure is used, then the device complexity is low, but the depth of field is limited to a nominal range
Solution Approach 1:
The focusing apparatus is divided into two distinct functional components: a focusing structure and a field-adjusting structure. The field-adjusting structure contains a transformation medium with specific electromagnetic parameters that independently extends the depth of field, while the focusing structure handles the primary focusing function. This segmentation allows each component to be optimized for its specific function, achieving extended depth of field without proportionally increasing overall device complexity.
Solution Approach 2:
A field-adjusting structure acts as an intermediary component between the electromagnetic wave source and the focusing structure. This intermediary contains a transformation medium with engineered electromagnetic parameters that modifies the electromagnetic field distribution, effectively extending the depth of field before the waves reach the focusing structure, thereby solving the depth of field limitation without requiring complete redesign of the entire system.
2Adaptability or versatility
If the depth of field is extended using transformation optics, then the field adjustment capability is improved, but the device complexity increases
Solution Approach 1:
The field-adjusting structure with transformation medium serves multiple functions simultaneously: it extends the depth of field, adjusts electromagnetic field distribution, and works with various focusing structures. The transformation medium can be configured with different electromagnetic parameters to achieve different field adjustment capabilities, making the device versatile without requiring multiple separate components for each function.
Solution Approach 2:
The transformation medium employs changes in electromagnetic parameters (permittivity and permeability distributions) to achieve field adjustment and depth of field extension. By engineering these parameters spatially, the device can adaptively control electromagnetic wave propagation without mechanical moving parts, reducing mechanical complexity while achieving enhanced adaptability and field adjustment capability.
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 enables the field-adjusting structure to accommodate more electromagnetic emitters and provide a significantly extended depth of field, enhancing the focusing capabilities and field adjustment for electromagnetic waves across a broader area.
Implementation Method 1
a field-adjusting structure with a transformation medium that applies a coordinate transformation, such as spatial dilation, to extend the depth of field beyond the nominal depth
Implementation Method 2
allowing for a greater range of electromagnetic energy convergence and adjustment
Data Source
AI summary
Apparatus, methods, and systems provide emitting, field-adjusting, and focusing of electromagnetic energy. In some approaches the field-adjusting includes providing an extended depth of field greater than a nominal depth of field. In some approaches the field-adjusting includes field-adjusting with a transformation medium, where the transformation medium may include an artificially-structured material such as a metamaterial.