Tiling Light-Sheet Microscopy with SLM Phase Modulation
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Solution Overview
Problem
Existing tiling light sheet selective plane illumination microscopy (TLS-SPIM) systems face challenges in imaging large samples at high spatial resolution and signal-to-noise ratio due to decreased imaging speed and increased raw data volume, while maintaining optimal light sheet thickness and confinement.
Innovation Solution
A method using a spatial light modulator (SLM) to segment a single pupil into groups with alternating phase map patterns, creating multiple coaxial excitation beam arrays that generate discontinuous light sheets, which are tiled to improve imaging speed, spatial resolution, and reduce data volume.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If the light sheet length is increased to image larger field of view, then the field of view is improved, but the light confinement ability decreases due to diffraction, reducing spatial resolution
Solution Approach 1:
The light sheet is segmented into multiple discrete segments or tiles along the propagation direction. Each segment maintains optimal thickness and confinement independently. By scanning and tiling these segmented light sheets, the system achieves both large field of view and high spatial resolution without the diffraction-limited confinement loss of a single long light sheet.
2Measurement precision
If tiling light sheet is used to maintain high spatial resolution in large FOV, then spatial resolution is improved, but imaging speed decreases proportionally to the number of tiles
Solution Approach 1:
The system performs preliminary optimization of the light sheet parameters (thickness, intensity distribution, confinement) before the actual imaging process. By pre-configuring the light sheet to optimal parameters and using predictive algorithms to determine the minimum necessary tiles, the system reduces the number of scanning positions required, thereby improving imaging speed while maintaining high spatial resolution.
3Measurement precision
If tiling light sheet is used to image large samples at high resolution, then spatial resolution is improved, but the amount of raw image data increases proportionally to the number of tiles
Solution Approach 1:
The system extracts and removes redundant or low-information data from the tiled images during the acquisition process. By using real-time quality assessment and selective data capture, only the most informative tiles are fully recorded at high resolution, while less critical regions use lower resolution or are skipped entirely. This extraction approach maintains high spatial resolution where needed while dramatically reducing the total volume of raw image data.
4Measurement precision
If the light sheet thickness is optimized for high spatial resolution, then axial resolution is improved, but the field of view is limited by the light sheet size
Solution Approach 1:
The system transitions from a single-dimension light sheet to a multi-dimensional tiling approach. By adding the scanning dimension and tiling multiple thin light sheets in sequence, the system effectively extends the field of view in the axial direction without compromising the thickness and resolution properties of individual light sheet segments. This dimensional transformation allows simultaneous achievement of high axial resolution and large 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
The method significantly increases imaging speed, improves spatial resolution, and reduces raw data volume by optimizing the tiling process and light sheet generation, enabling efficient 3D imaging of large samples.
Implementation Method 1
loading a corresponding phase map to each group of pupil subsections of the single pupil respectively by a spatial light modulator (SLM), and performing phase modulation on an excitation beam to create at least two coaxial excitation beam arrays
Implementation Method 2
The created at least two coaxial excitation beam arrays can be scanned to generate discontinuous light sheets accordingly
Implementation Method 3
a detector configured to detect fluorescence emitted by the sample
Data Source
Figure 1(a)~1(c)
Figure 1(d)~2(b)
Figure 2(c)~3(b)
AI summary
Provided are a tiling light sheet selective plane illumination microscopy (TLS-SPIM), a use method thereof and a microscopy system. The use method includes: step (101): loading a corresponding phase map (201, 202) to each group of pupil subsections (205, 206) of a pupil by means of a spatial light modulator (401), and performing phase modulation on an excitation beam to create at least two coaxial excitation beam arrays (203, 204); step (102): scanning the created at least two coaxial excitation beam arrays (203, 204) to generate discontinuous light sheets (1002) accordingly; and step (103): tiling at least one of the generated discontinuous light sheets (1002) in the propagation direction of the excitation light to obtain tiling light sheets for selective plane illumination of a sample. The method of using the TLS-SPIM, the TLS-SPIM and the system including same enables significant increasing of imaging speed, improvement of resolution, and reduction of source data amount.