Coherent Diffractive Imaging via Simultaneous Diffraction Pattern Recording
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Solution Overview
Problem
Existing methods for generating image data of a target object are time-consuming due to the need for iterative processes and precise estimation of probe functions, which can be inefficient in recording and processing diffraction patterns.
Innovation Solution
Simultaneously recording a plurality of separable diffraction patterns at a detector and providing image data through an iterative process responsive to the detected radiation intensity, allowing for coherent diffractive imaging without the need for initial probe function estimation, and using an aperture array to select and overlap probe positions for enhanced data collection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If iterative processes are used to generate image data with initial probe function estimation, then image data can be generated, but the time required to record and process data increases significantly
Solution Approach 1:
The patent divides the wavefront into multiple separate portions, each forming an independent diffraction pattern that can be recorded simultaneously. This segmentation allows parallel data collection, eliminating the sequential recording bottleneck while maintaining the iterative reconstruction process for high-quality image data generation.
Solution Approach 2:
The patent combines multiple diffraction patterns from different wavefront portions into a single composite measurement dataset. By merging these patterns recorded simultaneously at the detector, the system achieves comprehensive object information capture in reduced time, which is then processed through iterative algorithms to generate accurate image data.
2Loss of information
If multiple diffraction patterns are recorded sequentially, then complete object information can be obtained, but the productivity of the imaging system decreases
Solution Approach 1:
The patent transitions from sequential temporal recording to simultaneous spatial recording by using multiple wavefront portions that diverge to different regions of the detector. This dimensional change from time-based to space-based multiplexing allows complete object information to be captured in a single exposure, dramatically improving imaging productivity without sacrificing information completeness.
3Reliability
If probe function estimation is required before iterative processing, then the iterative process can converge properly, but the device complexity and operational difficulty increase
Solution Approach 1:
The patent enables the iterative reconstruction process to automatically determine the probe function from the recorded diffraction patterns without requiring external estimation or additional calibration measurements. The system self-calibrates during the iterative optimization process, eliminating complex pre-processing steps and reducing operational difficulty while maintaining reliable convergence.
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 reduces the time required to record data for image data determination, enabling efficient image data generation and allowing for the use of image data as a process control input or for generating images of target objects.
Implementation Method 1
An intensity of radiation scattered by the target object is detected using at least one detector
Implementation Method 2
Several diffraction patterns are recorded at a measurement plane using one or more detectors
Data Source
AI summary
Embodiments of the present invention provide a method of providing image data for constructing an image of at least a region of a target object, comprising the steps of simultaneously recording, at a detector, a plurality of separable diffraction patterns formed by a respective portion of radiation scattered by the target object; and providing the image data via an iterative process responsive to the detected intensity of radiation.