Single-Shot Ptychography System for Ultrahigh-Speed Imaging
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Solution Overview
Problem
Current ultrahigh-speed imaging techniques for non-repetitive ultrafast dynamical objects are complex, limit spatial resolution and field of view, and struggle to provide full characterization of complex objects, especially in short wavelengths like extreme UV and x-rays.
Innovation Solution
The development of a novel single-exposure ptychography system using principles of single-shot ptychography, which employs a light coding device to create coded light responses during a single exposure session, allowing for time-resolved imaging of dynamic objects through a technique called Time-resolved Imaging by Multiplexed Ptychography (TIMP), enabling flexible framerate and temporal resolution without the limitations of traditional imaging systems.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If traditional ultrahigh-speed imaging techniques are used, then frame rate is improved, but spatial resolution and field of view are limited
Solution Approach 1:
The patent applies segmentation by dividing the imaging process into multiple scanning positions that are sequentially illuminated. Each position provides partial information that is then reconstructed to form the complete high-resolution image, thereby achieving both high frame rate and high spatial resolution simultaneously
Solution Approach 2:
The patent transitions from traditional 2D spatial imaging to 4D imaging by adding temporal dimension (time-resolved) to the spatial coordinates. This is achieved through time-resolved imaging by multiplexed ptychography (TIMP) which captures dynamic processes at ultrahigh frame rates while maintaining spatial resolution through the addition of the time dimension
2Speed
If ultrahigh-speed cameras are used for non-repetitive ultrafast dynamical objects, then frame rate is improved, but device complexity increases
Solution Approach 1:
The patent replaces complex mechanical ultrahigh-speed camera systems with a simpler scanning illumination approach combined with computational reconstruction. Instead of using mechanically complex ultrahigh-speed detectors, the system uses sequential illumination at multiple positions with standard detectors, achieving ultrahigh frame rates through optical scanning rather than mechanical detector complexity
Solution Approach 2:
The patent applies preliminary action by performing scanning illumination at multiple positions before the actual detection and reconstruction process. The illumination pattern is pre-planned and executed sequentially, allowing the system to capture dynamic information without requiring complex real-time processing during detection
3Device complexity
If conventional imaging techniques are used, then simplicity is maintained, but full characterization of complex objects is not achieved
Solution Approach 1:
The patent applies parameter changes by measuring multiple parameters (both amplitude and phase) of the light field at multiple scanning positions. This multi-parameter measurement approach enables full characterization of complex objects including dynamic processes, going beyond conventional single-parameter intensity imaging
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 allows for the recovery of multiple complex frames from a single camera snapshot, achieving ultrahigh-speed imaging with improved robustness and flexibility, suitable for various spectral regions including extreme UV and x-rays, and enabling sub-femtosecond frame times using attosecond pulses.
Implementation Method 1
an optical system... comprising a single shot ptychography arrangement configured and operable to create diffraction light response patterns from the object in the object plane on a pixel matrix of the detection device
Data Source
AI summary
A ptychography system is presented for imaging an object located in an object plane. The ptychography system comprises an optical system, and a detection device. The optical system comprises a single shot ptychography arrangement configured and operable to create light response patterns from the object in the object plane on a pixel matrix of the detection device during the same exposure session of the detection device, wherein the optical system further comprises at least one light coding device configured and operable to apply at least one predetermined coding function to at least one of illuminating light and the light response of the object being collected, and said detection device is configured and operable with a predetermined duration of the exposure session during which the pixel matrix detects the collected light, such that image data indicative of the detected light during a single exposure session is in the form of a coded light response of the object being illuminated.