Rotatable Mirror Ptychographic Imaging System
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Solution Overview
Problem
Current Fourier Ptychography Microscopy (FPM) systems face limitations in flexibility, resolution, and throughput due to the use of partially coherent LED arrays, which restrict the ability to change illumination angles and overlap in Fourier space efficiently.
Innovation Solution
A ptychographic imaging system utilizing a single light source, a converging lens, and a rotatable mirror placed at a 2f plane of the lens, allowing for highly flexible multi-angle illumination by rotating the mirror to adjust the illumination angle for each image.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If LED arrays are used for illumination in Fourier Ptychography Microscopy, then the system is simple and manufacturing costs are lowered, but the light sources are only partially coherent which affects the quality of reconstructed images
Solution Approach 1:
The patent replaces the mechanical LED array system with a single high-power LED combined with a rotatable mirror system. This substitution maintains the simplicity of the setup while improving light coherence and image quality through the use of a single coherent light source instead of multiple partially coherent LEDs
Solution Approach 2:
The patent changes the illumination parameters by using a single high-power LED with high coherence and controlling illumination angles through mirror rotation. This parameter change from multiple low-power LEDs to a single high-power LED with controlled geometry improves both coherence and image quality while maintaining system simplicity
2Adaptability or versatility
If multiple LEDs are used to achieve different illumination angles, then illumination flexibility is improved, but the system complexity and time required for modifications increase
Solution Approach 1:
The patent introduces a rotatable mirror that can dynamically change illumination angles by rotation. This dynamic element replaces the need for multiple fixed LEDs arranged at different angles, providing flexible illumination control with a single light source and reducing system complexity
Solution Approach 2:
The single LED combined with the rotatable mirror serves multiple functions: it provides illumination at various angles, replaces multiple dedicated LEDs, and maintains system simplicity. This multi-functional approach achieves illumination flexibility without increasing device complexity
3Temperature
If low-power LEDs are used to avoid heat generation, then heat management is improved, but the throughput of the imaging system decreases due to longer acquisition time
Solution Approach 1:
The patent changes the power parameter of the LED from low-power to high-power operation. By using a single high-power LED instead of multiple low-power LEDs, the system achieves better Signal-to-Noise Ratio and shorter acquisition time, thereby improving throughput while managing heat through a single source rather than multiple sources
4Productivity
If LED multiplexing is used to increase throughput, then the number of simultaneous light sources is improved, but the computational burden of reconstruction increases and image quality degrades
Solution Approach 1:
The patent extracts the multiplexing approach and replaces it with a single high-power LED system. By taking out the need for multiple simultaneously active LEDs and using a single source with controlled illumination angles through mirror rotation, the system reduces computational burden while maintaining or improving throughput
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 configuration enhances the flexibility and throughput of the imaging system, enabling the use of high-power light sources and improving the Signal-to-Noise Ratio (SNR) while reducing the complexity of the setup and increasing the number of achievable illumination angles.
Implementation Method 1
a rotatable mirror configured to be placed at a 2f plane of the converging lens and reflect light beams emitted from the light source to the converging lens
Implementation Method 2
a converging lens... reflect light beams emitted from the light source to the converging lens
Data Source
AI summary
The invention relates to a ptychographic imaging system (100), comprising at least one light source (2), a converging lens (6) and a rotatable mirror (4) configured to be placed at a 2f plane of the converging lens (6) and reflect light beams emitted from the light source (2) to the converging lens (6).