Laser-Scanning Fluorescence Microscope Automatic Alignment
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Solution Overview
Problem
Current methods for aligning laser-scanning fluorescence microscopes, such as those using STED technology, require manual adjustments and do not ensure precise alignment within the focal area of the objective lens, leading to suboptimal spatial resolution and misalignment issues between excitation and fluorescence inhibition light.
Innovation Solution
A method and system that automatically aligns the microscope by scanning a sample marked with fluorescent dye, generating multiple images at varying intensities of fluorescence inhibition light and pinhole aperture openings, calculating an offset between these images, and shifting the excitation light and pinhole aperture to coincide in the focal area, ensuring precise alignment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If manual adjustment methods are used to align excitation and STED light, then the alignment process can be completed, but the alignment precision is insufficient and time-consuming
Solution Approach 1:
The system performs self-alignment by automatically calculating the offset between excitation and STED light focuses using image processing algorithms. The microscope system itself generates the alignment information through captured images and computes the necessary corrections without external intervention, achieving both high precision and efficiency
Solution Approach 2:
The system captures images at different focal positions, calculates the offset between excitation and STED light based on image analysis, and uses this feedback information to automatically adjust the alignment. This closed-loop feedback mechanism ensures precise alignment while minimizing manual intervention time
2Manufacturing precision
If conventional alignment methods are used, then the microscope can operate, but spatial resolution is degraded due to misalignment
Solution Approach 1:
The system replaces manual mechanical adjustment with an automated computational approach. Image processing algorithms and automated calculation methods substitute for manual mechanical alignment operations, achieving superior spatial resolution while simplifying the operational complexity through software-based solutions
3Measurement precision
If multiple manual adjustments are performed to achieve precise alignment, then alignment accuracy improves, but the complexity of the alignment process increases
Solution Approach 1:
The system combines multiple alignment functions into a single automated process. Image capture, offset calculation, and alignment determination are merged into one integrated automated workflow, achieving high alignment accuracy while reducing process complexity through consolidation of operations
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 allows for quick and accurate alignment of the laser-scanning fluorescence microscope, improving spatial resolution by ensuring the intensity maximum of excitation light and intensity minimum of fluorescence inhibition light, as well as the pinhole aperture, coincide in the focal area, thereby enhancing image quality and reducing misalignment offsets.
Implementation Method 1
scanning a structure in a sample, the structure being marked with a fluorescent dye
Implementation Method 2
an objective lens focusing the excitation light and the fluorescence inhibition light into a focal area
Data Source
AI summary
For setting a laser-scanning fluorescence microscope to a correct alignment in which an intensity maximum of excitation light and an intensity minimum of fluorescence inhibition light coincide in a focal area of an objective lens, a structure in a sample marked with a fluorescent dye is scanned with the intensity maximum of the excitation light to generate first and second pictures of the sample, the first picture corresponding to a higher and the second picture corresponding to a lower intensity of the fluorescence inhibition light. A spatial offset of a first image of the structure in the first picture with regard to a second image of the structure in the second picture is calculated; and the intensity maximum of the excitation light is shifted with regard to the intensity minimum of the fluorescence inhibition light in the direction of the offset calculated to set the microscope to the correct alignment.