Multi-Channel Fluorescence Microscope Synchronization
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Solution Overview
Problem
Current fluorescence microscopes struggle to accurately image multiple fluorescence emission spectra in quickly moving specimens and achieve high resolution over a wide field-of-view, due to limitations in optical arrangements and detector capabilities.
Innovation Solution
A multi-channel computational fluorescence microscope system that synchronizes fluorescence signals by partitioning the camera array and illumination source into multiple imaging channels, allowing simultaneous capture and analysis of multiple fluorescence excitation and emission characteristics across a large area.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple emission filters are mechanically shifted between subsequent snapshots to detect multiple fluorescence emission wavelengths, then multiple fluorescence colors can be detected, but the system cannot accurately image quickly moving specimens and loses temporal synchronization
Solution Approach 1:
The system segments the detection function by assigning different emission filters to different camera sensors in a multi-camera array. Each camera simultaneously captures a specific fluorescence wavelength channel, eliminating the need for mechanical filter shifting and enabling synchronized multi-color imaging of moving specimens.
Solution Approach 2:
The patent transitions from temporal multiplexing (sequential filter switching) to spatial multiplexing (parallel camera arrays with different filters). By adding a spatial dimension to the detection system, multiple fluorescence channels are captured simultaneously across different spatial locations, preserving temporal synchronization for dynamic specimens.
2Speed
If multiple image sensors are placed behind a common objective lens with beam-splitters to image multiple fluorescent emitters simultaneously, then multiple fluorescence colors can be detected at the same time, but the field-of-view is limited to a small area and the optical arrangement becomes complex
Solution Approach 1:
The system divides the imaging task across multiple independent camera modules, each with its own objective lens and emission filter. This segmentation eliminates the need for complex beam-splitter arrangements while maintaining simultaneous multi-color imaging capability, and allows each module to have a simpler, optimized optical path.
Solution Approach 2:
Each camera module in the array is designed as a universal, interchangeable unit capable of detecting different fluorescence wavelengths through filter selection. This modular universality simplifies the overall system architecture compared to custom beam-splitter designs, while maintaining the ability to image multiple fluorescent emitters simultaneously across an extended field-of-view.
3Adaptability or versatility
If a spatial light modulator is used to alter the point-spread function of each fluorescence emission wavelength, then multiple fluorescence channels can be imaged, but high resolution over a wide field-of-view cannot be achieved due to lens aberrations and detector limitations
Solution Approach 1:
The patent segments the imaging system into multiple camera modules, each optimized for a specific fluorescence wavelength channel. By dedicating separate optical paths to each wavelength, the system avoids the cumulative aberrations that would affect a single wide-field system attempting to capture multiple channels, thereby maintaining high resolution across the extended field-of-view.
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
Enables accurate correlation of fluorescence measurements at high resolution across an unbounded field-of-view, enabling experiments on freely moving organisms and large biological samples, and simplifies the optical arrangement for high-resolution imaging.
Implementation Method 1
A fluorescence excitation filter is disposed in the path of the light, to filter out light having undesirable wavelengths... The fluorophores in the sample, after absorbing the fluorescence excitation light, can emit fluorescence light
Implementation Method 2
The emission filter is also functioned to filter out the reflective portion of the illumination light, which can be much stronger than the emitted fluorescence
Implementation Method 3
The beamsplitter can also be a dichroic beamsplitter, which can act as a wavelength specific filter, transmitting the fluorescence through to the camera, and reflecting the reflective excitation light
Data Source
AI summary
A system and method for high resolution multi-fluorescence imaging with synchronized image acquisition amongst sensors can be used to simultaneously capture fluorescence signals from multiple fluorophores over extremely large fields of view. The system can include an array of micro-cameras, along with a particular arrangement of fluorescent filters that can be fixed in one location or moved to new locations.