AOTF Optics Arrangement for Flexible Multi-Color Microscopy Illumination
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current microscopy techniques face challenges in providing flexible and quickly changeable multi-color illumination for samples, often requiring mechanical components that are complex and unstable, and fail to effectively utilize both diffracted and undiffracted light components for simultaneous or sequential wavelength use.
Innovation Solution
An optics arrangement using an AOTF or EOM to diffract or modulate light components of different wavelengths, combined with a polarization beam splitter and a light structuring apparatus, allows for the simultaneous or sequential use of both diffracted and undiffracted light components on a common beam path, enabling flexible and stable multi-color illumination without moving mechanical parts.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If mechanical components are used for wavelength selection and beam shaping, then beam shaping capability is achieved, but device complexity and instability increase
Solution Approach 1:
The patent replaces mechanical wavelength selection components (diffraction gratings, prisms) with an AOTF that uses acoustic waves to modulate light wavelengths. This substitution eliminates mechanical moving parts while maintaining the capability to select and shape light beams of different wavelengths, thereby reducing device complexity and improving stability.
Solution Approach 2:
The AOTF changes the wavelength parameter of light through acoustic modulation, allowing flexible beam shaping without mechanical movement. The system can rapidly switch between different wavelengths and beam shapes by changing acoustic parameters, achieving adaptability without mechanical complexity.
2Adaptability or versatility
If only one light component is used for illumination, then system simplicity is maintained, but multi-color illumination flexibility is reduced
Solution Approach 1:
The AOTF serves multiple functions simultaneously: it acts as a wavelength selector, a beam shaper, and a polarization controller. By integrating these functions into a single device, the system achieves multi-color illumination flexibility without proportionally increasing device complexity. The AOTF can handle both diffracted and undiffracted light components, enabling versatile illumination options.
Solution Approach 2:
The patent combines the handling of multiple light components (diffracted and undiffracted) into a single integrated optics arrangement. The AOTF processes both light paths simultaneously, merging what would traditionally require separate optical systems into one unified device, thereby achieving multi-color flexibility without excessive complexity.
3Speed
If rapid wavelength switching is implemented, then illumination speed is improved, but mechanical stability deteriorates
Solution Approach 1:
By replacing mechanical wavelength switching mechanisms with acoustic modulation in the AOTF, the system achieves rapid wavelength switching without mechanical movement. The acoustic waves can be changed at high speeds without the inertia or friction associated with mechanical components, thereby maintaining both speed and stability.
4Adaptability or versatility
If both diffracted and undiffracted light components are utilized, then illumination flexibility is improved, but optics arrangement complexity increases
Solution Approach 1:
The AOTF is designed to process both diffracted and undiffracted light components through the same device, making it a universal handler of multiple light paths. This multi-functionality allows the system to utilize both light components for flexible illumination without requiring separate optical systems for each component, thereby limiting the increase in 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
This solution enables flexible and rapid switching between different wavelengths for illumination, allowing for simultaneous or sequential use of multiple colors, improving beam shaping and stability, and enhancing the capabilities of microscopy techniques by utilizing both polarized light components effectively.
Implementation Method 1
An AOTF (acousto-optical tunable filter) or EOM (electro-optical modulator). The AOTF is set up to diffract at least two light components from incident illumination light into different order-of-diffraction directions
Implementation Method 2
An AOTF (acousto-optical tunable filter) or EOM (electro-optical modulator). The AOTF is set up to diffract at least two light components from incident illumination light
Implementation Method 3
A polarization beam splitter with which the two light components are spatially separated in dependence on the polarization
Implementation Method 4
Many different techniques can likewise be used for beam shaping, for example stops or DMDs (digital micromirror devices), with which a spatial structure can be set over a beam cross section
Data Source
AI summary
An optics arrangement for flexible multi-color illumination for a light microscope includes an acousto-optical tunable filter (“AOTF”). The AOTF is set up to diffract two light components from incident illumination light into different order-of-diffraction directions. The two light components differ in their wavelengths and polarizations. Alternatively, an electro-optical modulator (“EOM”) can be used, with which two temporally successive light components of different wavelengths are set to different polarization directions. A polarization beam splitter separates the two light components of different wavelengths and polarizations into reflection light, which is reflected at the polarization beam splitter, and transmission light, which is transmitted at the polarization beam splitter. A light structuring apparatus imprints different structures onto the transmission light and the reflection light. The structured transmission light and the structured reflection light are then recombined by the polarization beam splitter or a further polarization beam splitter onto a common beam path.