Laser Microscope Detection Optics With Tunable Filters and Focus Compensation
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Solution Overview
Problem
Existing laser scanning microscopes face challenges in achieving simultaneous spectral filtering and spatially resolving detection, as conventional filter arrangements disrupt the spatial resolution and focal position on spatially resolving detectors, particularly when using color gradient filters or prism arrangements.
Innovation Solution
A detection device with a continuous filter module featuring two independently tunable filter elements and a compensator element downstream, which adjusts the focal position on the spatially resolving detector, compensating for mechanical displacements caused by filter element movements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If color gradient filters or prism arrangements are used for spectral filtering, then spectral detection capability is improved, but spatial resolution and focal position on the detector deteriorate
Solution Approach 1:
The detection device divides the spectral filtering function into multiple independent filter elements (first filter element and second filter element) that can be independently adjusted. This segmentation allows each filter element to be optimized for spectral filtering without compromising the overall spatial resolution, as they are positioned and configured to minimize disruption to the focal point on the spatially resolving detector.
Solution Approach 2:
The filter elements are designed to be continuously adjustable in terms of their spectral filtering characteristics. This dynamic adjustment capability allows the system to adapt to different spectral detection requirements while maintaining spatial resolution through coordinated adjustment of the filter elements' positions and orientations.
2Adaptability or versatility
If filter elements are moved to adjust spectral filtering, then spectral detection flexibility is improved, but mechanical displacements disrupt focal position on the detector
Solution Approach 1:
The system incorporates a control unit that monitors the positions of the filter elements and automatically adjusts them to maintain the focal point at the correct position on the spatially resolving detector. This feedback mechanism ensures that spectral filtering adjustments do not compromise focal position accuracy, as any deviations are detected and corrected in real-time.
Solution Approach 2:
The control unit acts as an intermediary between the filter element adjustment mechanism and the detector, coordinating their operations to ensure that spectral filtering changes do not disrupt the focal position. The control unit processes information about filter element positions and makes compensating adjustments to maintain optimal imaging conditions.
3Adaptability or versatility
If multiple filter arrangements are used to detect different fluorophores, then spectral detection versatility is improved, but device complexity increases
Solution Approach 1:
The detection device employs a universal filter system where the first and second filter elements can be independently adjusted to detect multiple different fluorophores. This multi-functional design eliminates the need for separate filter arrangements for each fluorophore, as the same filter elements can be reconfigured to detect various spectral signatures through continuous adjustment of their filtering characteristics.
Solution Approach 2:
The system merges the functions of multiple filter arrangements into a single integrated detection pathway. By combining the first and second filter elements in a unified configuration with independent adjustment capabilities, the device achieves multi-fluorophore detection without requiring separate physical filter modules for each spectral channel, thereby reducing overall device complexity.
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
Enables continuous spectral filtering while maintaining high spatial resolution and focal accuracy on spatially resolving detectors, allowing for efficient detection of multiple spectral channels without disrupting the spatial resolution of the overall image.
Implementation Method 1
a first fraction of the light beam passing through a first filter element and a second fraction of the light beam passing through a second filter element
Implementation Method 2
at least one compensator element is arranged optically downstream of the continuous filter module by means of which a focal point of light on the spatially resolving detector can be adjusted
Data Source
AI summary
The invention relates to a detection device (2) for a laser scanning microscope, the detection device (2) havinga light inlet (4), at least one filter module (14) and at least one spatially resolving detector (22) and being configured to guide light from the light inlet (4) to the filter module (14) and from there to the spatially resolving detector (22), at least one filter module (14) being designed as a continuous filter module with two continuously tunable filter elements (16), and at least one compensator element (26) being arranged optically downstream of the continuous filter module (14), by means of which a focal position of light on the spatially resolving detector (22) can be adjusted.