Elliptical Light Shaping Diffuser for Stripe Artifact Reduction
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Solution Overview
Problem
Light-sheet fluorescence imaging techniques often produce images with stripe artifacts due to light-absorbing or light-scattering structures, leading to misinterpretation of data and inefficiencies in reducing these artifacts with existing methods.
Innovation Solution
The use of an elliptical light shaping diffuser to transform a parallel light-sheet into an elliptically diffuse light-sheet, providing passive multi-directional illumination that reduces shadows and stripe artifacts by scattering light rays at different angles, thereby improving image quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a parallel light-sheet is used for illumination, then image acquisition speed and resolution are improved, but stripe artifacts and shadows are introduced due to light-absorbing or light-scattering structures
Solution Approach 1:
The patent applies dynamic multidirectional illumination by rapidly scanning the light sheet through different angles and positions. The light sheet is dynamically repositioned to illuminate the sample from multiple directions during the imaging process, transforming the static illumination into a dynamic multi-directional system that eliminates stripe artifacts while maintaining high acquisition speed
Solution Approach 2:
The patent implements periodic scanning of the light sheet through repeated cycles of illumination from different angles. The light sheet is periodically repositioned in a controlled manner to systematically cover multiple illumination directions, creating a periodic action that eliminates directional bias and stripe artifacts in the final image
2Object-generated harmful factors
If image processing algorithms are used to reduce stripe artifacts, then stripe prominence is reduced, but the process becomes labor intensive and expensive
Solution Approach 1:
The patent applies preliminary action by eliminating stripe artifacts during the illumination process itself rather than correcting them in post-processing. The light sheet is pre-configured to illuminate from multiple directions before the image is captured, preventing stripe artifact formation at the source and avoiding the need for complex subsequent image processing algorithms
3Object-generated harmful factors
If Bessel beam illumination or airy beam illumination is used, then stripe artifacts are reduced, but the technique becomes more complex and expensive
Solution Approach 1:
The patent segments the illumination process into multiple discrete illumination directions by scanning the light sheet through different angles. Instead of using complex single-beam techniques like Bessel or airy beams, the system divides the illumination into multiple simpler directional components that can be sequentially applied, reducing overall system complexity while maintaining artifact reduction effectiveness
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 significantly reduces image artifacts, allowing for clearer and more accurate imaging, particularly in microscopy applications, enabling better particle tracking and visual analysis of samples.
Implementation Method 1
The elliptical light shaping diffuser is adapted transform an input light-sheet into an output light-sheet that spreads anisotropically along orthogonal diffusing angles
Data Source
AI summary
Systems and methods for passive multi-directional illumination in light-sheet fluorescence imaging and microscopy are disclosed herein. An elliptical light shaping diffuser is placed in the illumination path between the source of a light-sheet and the illuminated sample. The light-sheet is diffused anisotropically along two directions perpendicular to its propagation direction, eliminating stripe artifacts in obtained images. The method includes converting a light-sheet into an elliptically diffuse light-sheet by passing it through an elliptical light shaping diffuser, illuminating a sample with the elliptically diffuse light-sheet. The system includes a light-sheet source, an elliptical light shaping diffuser adapted to convert the light-sheet into an elliptically diffuse light-sheet to illuminate the sample, typical microscopy optics and lenses, and image capturing elements.