Microscope Specimen Holder Alignment via Reflected Illumination Feedback
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Solution Overview
Problem
In light sheet microscopy, specimen holders with inclined cover slips cause aberrations due to oblique passage of illumination and detection light, leading to reduced imaging quality and the need for precise alignment to maintain acceptable signal-to-noise ratios and minimize background fluorescence.
Innovation Solution
A method for adjusting the specimen holder using reflected components of illumination radiation to correct its relative angle and distance within the beam path, employing detectors to measure and compare actual and intended positions, and generating control commands to align the holder optimally, utilizing various beam types such as Gaussian or Mathieu beams to minimize image quality impairment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the specimen holder is adjusted to achieve high imaging quality, then aberrations are reduced, but the alignment process becomes complex and time-consuming
Solution Approach 1:
The patent employs feedback by using a detector to capture the position of a reference structure in the specimen holder and comparing it with a target position. Based on this feedback, the system automatically adjusts the specimen holder's position and orientation to achieve optimal alignment, eliminating complex manual alignment procedures while maintaining high imaging quality.
Solution Approach 2:
The system performs self-alignment by automatically detecting the reference structure's position and adjusting the specimen holder without requiring manual intervention. The automated feedback loop enables the system to self-correct alignment deviations, simplifying the overall process while ensuring precise positioning for high-quality imaging.
2Device complexity
If manual alignment methods are used to position the specimen holder, then device complexity is reduced, but measurement precision and alignment accuracy deteriorate
Solution Approach 1:
The patent implements an automated feedback-based alignment system that uses a detector to precisely measure the position of a reference structure and compares it with the target position. This feedback mechanism enables high measurement precision and alignment accuracy while keeping the device complexity manageable through software-controlled automation rather than complex mechanical systems.
Solution Approach 2:
The patent replaces manual mechanical alignment operations with an automated optical-mechanical system. A detector optically detects the reference structure's position, and a control system automatically adjusts the specimen holder's position, substituting imprecise manual mechanical alignment with precise automated detection and adjustment, thereby improving measurement precision without excessive complexity.
3Measurement precision
If automated feedback-based alignment is implemented, then alignment accuracy is improved, but device complexity and cost increase
Solution Approach 1:
The patent implements a feedback-based alignment system where a detector captures the position of a reference structure, compares it with a target position, and automatically adjusts the specimen holder. This automated feedback loop significantly improves alignment accuracy while maintaining manageable device complexity through software-controlled processes rather than complex hardware mechanisms.
Solution Approach 2:
The alignment system integrates multiple functions into a single automated process: the detector serves both as a positioning sensor and a feedback source, the control system manages both detection and adjustment operations, and the reference structure provides both alignment reference and detection target. This multi-functionality reduces overall device complexity while achieving high alignment accuracy.
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 method effectively corrects aberrations and improves imaging quality by ensuring precise alignment of the specimen holder, maintaining high signal-to-noise ratios and reducing bleaching effects, while being adaptable for both inverted and upright microscopes.
Implementation Method 1
A component of the illumination radiation reflected by the specimen holder is captured by means of a detector
Data Source
AI summary
A method for adjusting a specimen holder in the beam path of a microscope, in which at least one beam of an illumination radiation is directed onto the specimen holder; a component of the illumination radiation reflected by the specimen holder is captured by means of a detector and measurement values of the captured illumination radiation are ascertained. A current actual manner of positioning of the specimen holder in relation to the beam path is established depending on the measurement values; the established actual manner of positioning is compared to an intended manner of positioning, and control commands for modifying the actual manner of positioning are produced, the execution of which causes the specimen holder to be moved into the intended manner of positioning.