Microscope Laser Alignment via Imaging Reflection Unit
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Solution Overview
Problem
Existing methods for adjusting laser radiation in TIRF microscopy are complex and do not comply with safety guidelines, making it difficult to monitor and adjust the parallelism and position of the laser beam effectively.
Innovation Solution
An imaging optical reflection unit is coupled to the microscope to image the laser light source on a detector, allowing for the monitoring and adjustment of the focus position and position of the laser source, ensuring parallelism and safe operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the laser beam is observed in the far field for adjustment, then the parallelism of the laser beam can be monitored, but safety guidelines for laser use are violated due to high-intensity radiation
Solution Approach 1:
An imaging optical reflection unit is introduced as an intermediary between the laser beam and the observation system. This unit reflects and images the laser beam onto a detector, allowing parallelism monitoring without direct far-field observation of the high-intensity beam, thus resolving the safety contradiction
Solution Approach 2:
Instead of directly observing the original laser beam in the far field, an optical image (copy) of the beam is created using the imaging optical reflection unit. This copy can be safely detected while preserving all necessary information about beam parallelism and position
2Measurement precision
If complex adjustment methods are used to monitor laser characteristics, then measurement precision improves, but device complexity increases
Solution Approach 1:
The imaging optical reflection unit serves multiple functions simultaneously: it monitors beam parallelism, determines focus position in the exit pupil, calculates penetration depth, and ensures safety compliance. This multi-functionality achieves comprehensive laser characterization without requiring multiple separate complex systems
Solution Approach 2:
The system uses the microscope's own optical elements (objective lens, beam path) to perform the measurement and adjustment functions. The existing optical train is leveraged to image the laser characteristics, eliminating the need for external complex measurement equipment
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 provides a simple, safe, and reproducible way to adjust the laser source for TIRF microscopy, maintaining laser safety guidelines and facilitating precise adjustments while protecting personnel from high-intensity laser radiation.
Implementation Method 1
an imaging optical reflection unit is coupled to the microscope to image the light of the light source on a detector
Implementation Method 2
an imaging optical reflection unit is coupled to the microscope to image the light of the light source on a detector
Implementation Method 3
a high axial resolution is achieved by emitting illumination radiation into a high-aperture objective in such a way that total internal reflection occurs at the surface of the specimen
Data Source
AI summary
A method by which the illumination radiation to be coupled into the illumination beam path of a microscope can be exactly monitored and/or adjusted. In the method for adjusting a light source for a microscope, an imaging optical reflection unit, instead of the objective, is coupled to the microscope in order to image the light of the light source on a detector in such a way that a monitoring of the focus position and/or the position and/or an adjustment of the laser light source with respect to the focus position and/or the position can be carried out. Provided is an approach for monitoring and adjusting a laser beam to be coupled into the illumination beam path of a microscope particularly for using TIRF effects. It can also be used in principle for other solutions in which the parallelism of illumination beams must be monitored and/or adjusted.