Transformation Medium Field-Adjusting Structure 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 the focusing and sensing capabilities, particularly in applications requiring precise control over electromagnetic radiation.
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 larger actual field region that accommodates more emitters and provides improved focusing capabilities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of stationary object
If a transformation medium with coordinate transformation is used to extend depth of field, then the actual depth of field increases, but the device complexity increases
Solution Approach 1:
A field-adjusting structure is introduced as an intermediary element between the emitter and the focusing structure. This field-adjusting structure includes a transformation medium that applies coordinate transformation to the electromagnetic waves, effectively extending the depth of field without requiring the entire system to be complex. The intermediary handles the coordinate transformation task, allowing the rest of the system to remain relatively simple.
Solution Approach 2:
The transformation medium changes the electromagnetic parameters of the waves by applying a coordinate transformation. This parameter change extends the depth of field by effectively dilating the spatial coordinates, allowing the system to accommodate a larger actual field region while maintaining manageable device complexity through controlled parameter modification.
2Volume of moving object
If spatial dilation coordinate transformation is applied to extend depth of field, then the actual field region increases, but the manufacturing precision requirements increase
Solution Approach 1:
The transformation medium is divided into multiple layers or segments, each handling a portion of the coordinate transformation. This segmentation allows for more manageable manufacturing of each individual layer while achieving the overall spatial dilation effect when combined, reducing the precision requirements for any single component.
Solution Approach 2:
By changing the electromagnetic parameters through coordinate transformation rather than requiring precise physical dimensions, the system achieves an extended actual field region with more relaxed manufacturing tolerances. The parameter transformation approach substitutes dimensional precision requirements with controllable electromagnetic property adjustments.
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 focusing and sensing capabilities by increasing the actual depth of field, enabling more efficient concentration of electromagnetic energy within a nominal focusing region, thus improving the resolution and coverage of electromagnetic radiation.
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
a focusing structure, operable to receive the input electromagnetic energy and deflect the input electromagnetic energy to converge towards a focusing region
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.