Laser Micro-Dissection Dynamic Aperture Control
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current laser microdissection methods are time-consuming and produce inconsistent results due to difficulties in stopping the cutting line and adjusting laser parameters, leading to dissectates adhering to the collection vessel walls instead of falling freely, and requiring repeated cuts.
Innovation Solution
A method where laser microdissection parameters such as aperture, attenuation, and focal position are continuously varied along the closed cutting line using image processing and a central processor to optimize cutting speed and precision, allowing for precise and quick dissectate removal independent of specimen preparation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the cutting line is stopped before the last laser pulse and the laser aperture is enlarged, then the cutting width is increased and the dissectate can be severed, but the equipment operation becomes complicated and time-consuming
Solution Approach 1:
The patent applies dynamics by continuously varying the aperture of the laser beam during the cutting process instead of using fixed settings. The aperture is dynamically adjusted based on the position along the cutting line, automatically enlarging near the end to increase cutting width and enable severing of the dissectate, while eliminating the need for manual intervention or complex equipment operations.
Solution Approach 2:
The patent implements parameter changes by modifying the aperture parameter of the laser beam as a function of position along the cutting line. The aperture is varied continuously, being smaller during most of the cut and automatically enlarged near the endpoint to increase cutting width, allowing precise control of the cutting process without complicating equipment operation.
2Productivity
If the aperture and attenuation are varied simultaneously, then the cutting speed is increased, but the control of laser parameters becomes more complex
Solution Approach 1:
The patent merges the control of aperture and attenuation into a single integrated control system that automatically adjusts both parameters simultaneously based on position along the cutting line. This coordinated variation of both parameters increases cutting speed by optimizing energy delivery, while the automated integration eliminates the need for separate manual controls, actually reducing operational complexity.
Solution Approach 2:
The system employs feedback control by continuously monitoring position along the cutting line and automatically adjusting both aperture and attenuation parameters in response. This closed-loop control enables simultaneous variation of both parameters to optimize cutting speed, with the control system managing the complexity automatically rather than requiring manual coordination.
3Productivity
If the dissectate is cut out using conventional methods, then the cutting can be completed, but the dissectate adheres to the collection vessel walls instead of falling freely
Solution Approach 1:
The patent applies dynamics by continuously adjusting the aperture along the cutting line, with automatic enlargement near the endpoint. This dynamic adjustment ensures complete severing of the dissectate from the specimen, allowing it to fall freely into the collection vessel without adhering to the walls, thereby improving collection efficiency while maintaining cutting completion.
4Ease of operation
If the laser parameters are kept constant, then the equipment operation is simple, but the cutting results are inconsistent and repeated cuts are required
Solution Approach 1:
The patent resolves this contradiction by implementing automatic dynamic adjustment of laser parameters including aperture and attenuation based on position along the cutting line. The system maintains operational simplicity through automation, while the continuous parameter variation ensures consistent cutting results by adapting to local specimen conditions and cutting progress, eliminating the need for repeated cuts.
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 faster, more precise, and reliable cutting of dissectates, reducing the need for repeated cuts and improving the collection efficiency by synchronizing laser pulses with parameter adjustments, ensuring dissectates fall freely into the collection vessel.
Implementation Method 1
The cutting is based in this case on the known principle of laser ablation, that is to say the individual laser pulses produce on the cutting line a plasma that 'vaporizes' the specimen material.
Implementation Method 2
the individual laser pulses produce on the cutting line a plasma that 'vaporizes' the specimen material
Implementation Method 3
The dissectate then falls down under the action of gravity, and is captured in a collecting vessel
Data Source
AI summary
A laser-micro-dissection method and a device for laser micro-dissection involves cutting a dissectate from a biological sample, which is applied to a planar carrier, by means of laser pulses along a closed cutting line. The parameters, which determine the laser pulses and the cut lines, are synchronous in relation to the laser pulses and are continually modified along the closed cut line. All elements which are arranged in the optical axis and which determine the parameters of the laser pulse and the cut lines, are controlled by a central calculation unit.