Light Sheet Microscopy With Slit-Stop Detection for Stray Light Control
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Solution Overview
Problem
Existing light sheet microscopy techniques face challenges in achieving high resolution and contrast imaging of large sample volumes due to sample-induced aberrations and stray light, particularly when using conventional sample holders like multiwell plates and Petri dishes, which result in optical aberrations and limited axial resolution.
Innovation Solution
The implementation of a light sheet microscope with an area detector equipped with a first slit stop and an adaptive optical detection element, along with a control device, to mask out regions outside the focal plane, combined with the use of multiple light sheets at different angles, to improve imaging contrast and lateral resolution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional sample holders and illumination configurations are used in light sheet microscopy, then the setup is simple and easy to operate, but the resolution and contrast for large sample volumes deteriorate due to sample-induced aberrations and stray light
Solution Approach 1:
The detection path is segmented by introducing a slit stop that divides the detection plane into regions corresponding to different sample depths. This segmentation allows selective detection of light from the focal plane while blocking stray light from out-of-focus regions, thereby improving resolution and contrast without requiring complex sample preparation or illumination modifications
Solution Approach 2:
A slit stop is introduced as an intermediary element in the detection path between the sample and the detector. This intermediary component selectively transmits light from the focal plane while blocking stray light from out-of-focus regions, improving image quality without adding complexity to the illumination system or sample holder
2Measurement precision
If conventional sample holders and illumination configurations are used in light sheet microscopy, then the setup is simple and easy to operate, but the contrast for large sample volumes deteriorates due to stray light
Solution Approach 1:
The slit stop extracts and blocks the harmful stray light component from the detection path while allowing useful light from the focal plane to pass through. This selective extraction of unwanted light improves contrast by eliminating the dominant source of background noise without requiring complex modifications to the overall system
Solution Approach 2:
The slit stop serves as an intermediary that mediates between the sample and detector by selectively transmitting useful light while blocking stray light. This simple intermediary component achieves contrast improvement without adding complexity to the illumination system or sample holder
3Productivity
If the focal plane is fixed in conventional light sheet microscopy, then the system is simple to operate, but large sample volumes cannot be imaged rapidly with high resolution
Solution Approach 1:
The system is made dynamic by enabling displacement of the focal plane along the optical axis and corresponding adjustment of the slit stop position. This dynamic configuration allows rapid imaging of large sample volumes by sequentially capturing images at different depths and reconstructing them into a 3D volume, achieving high productivity without complex mechanical scanning systems
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 enables rapid and high-resolution imaging of large sample volumes with improved contrast by minimizing aberrations and stray light, allowing for complete capture of sample volumes using conventional sample carriers.
Implementation Method 1
an illumination objective for illuminating the sample via an illumination beam path with a first light sheet, which intersects the sample volume in a first light sheet plane
Implementation Method 2
The light coming from the sample is preferably fluorescence light excited in the sample by the illumination with the first light sheet
Implementation Method 3
a detection objective, the focal plane of which lies in the sample volume parallel to or in the object plane
Implementation Method 4
a detection device for the imaging of light coming from the sample
Data Source
AI summary
A light sheet microscope for illuminating a sample arranged in an object plane on a sample carrier, comprising: an illumination device having an objective for illuminating the sample via an illumination beam path with a first light sheet, which intersects the sample volume in a first light sheet plane, the first light sheet plane intersecting the object plane at a skew first illumination angle (α), and a detection device for imaging of light coming from the sample, having an objective, the focal plane lying in the sample volume parallel to or in the object plane, and an area detector having a detector plane. The area detector includes a first slit stop in the detection beam path upstream of the area detector so as to mask out such regions of the sample volume which are illuminated by the first light sheet but lie outside the focal plane of the detection objective.