Standing Wave Interferometric Microscope with Two-Way Beam Splitter
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Interferometric Photo-Activated Localization Microscopy (iPALM) techniques face challenges due to the complexity and fragility of three-phase beam splitters, which are sensitive to temperature fluctuations and mechanical vibrations, difficult to manufacture and scale, and require multiple detectors, increasing cost and bulk.
Innovation Solution
A wide-field interferometric microscope using a standing wave illumination configuration with a two-way beam splitter and movable mirror to generate a sinusoidal modulation of input radiation, allowing for alternative depth-resolved localization microscopy without the need for a three-phase beam splitter and multiple detectors, utilizing a dual or single-insertion architecture.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a three-phase beam splitter is used in iPALM, then axial resolution is achieved, but device complexity and fragility increase significantly
Solution Approach 1:
The patent extracts and removes the complex three-phase beam splitter component from the optical system. Instead of using a three-phase beam splitter, the invention employs a standard two-way beam splitter combined with a standing wave illumination pattern, thereby eliminating the problematic component while preserving axial resolution capability through interference of light beams from opposite directions
Solution Approach 2:
The patent inverts the conventional approach by using standing wave illumination to create the interference pattern needed for axial resolution, rather than relying on a complex beam splitter to create the interference. The illumination is applied from opposite directions through the specimen, and the standing wave pattern itself provides the phase information needed for depth localization
2Measurement precision
If a three-phase beam splitter is used, then interferometric detection is enabled, but sensitivity to temperature fluctuations and mechanical vibrations increases
Solution Approach 1:
The patent replaces the expensive, fragile, and environmentally sensitive three-phase beam splitter with a robust, commercially available two-way beam splitter. This substitution maintains the interferometric detection capability while dramatically improving system reliability and reducing sensitivity to temperature and vibration disturbances
3Measurement precision
If multiple detectors are used for phase-separated outputs, then axial position detection is improved, but cost and bulk increase
Solution Approach 1:
The patent makes the two-way beam splitter serve multiple functions: it performs both the beam splitting function and provides the reference beam for interference, while the standing wave illumination pattern provides the phase modulation. This multi-functionality eliminates the need for additional specialized components and detectors, reducing system complexity while maintaining axial position detection capability
4Measurement precision
If a three-phase beam splitter is used, then iPALM functionality is achieved, but ease of manufacture and scaling deteriorates
Solution Approach 1:
The patent uses a standard, commercially available two-way beam splitter design that can be easily manufactured and replicated, replacing the custom, difficult-to-manufacture three-phase beam splitter. This substitution enables easier manufacturing, scaling, and integration into different microscope systems while maintaining the super-resolution imaging capability through the standing wave interference approach
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 configuration simplifies the optical and detection architecture, reduces costs, and enhances scalability while maintaining high resolution by using a regular two-way beam splitter and two cameras, providing effective axial resolution without the limitations of dud zones and mechanical sensitivity.
Implementation Method 1
The employed illuminator comprises an optical cavity that is configured to produce a standing wave of input radiation at the analysis location
Implementation Method 2
A pair of projection systems, arranged at opposite sides of said analysis location, to collect at least a portion of said fluorescence light and direct a corresponding pair of light beams into a respective pair of inputs of an optical combining element, where they optically interfere
Data Source
Figure 1
Figure 2
Figure 3
AI summary
A wide-field interferometric microscope comprising: - A specimen holder, for holding a specimen at an analysis location; - An illuminator, for illuminating the specimen with input radiation, so as to cause it to emit fluorescence light; - A pair of projection systems, arranged at opposite sides of said analysis location, to collect at least a portion of said fluorescence light and direct a corresponding pair of light beams into a respective pair of inputs of an optical combining element, where they optically interfere; - A detector arrangement, for examining output light from said combining element, wherein: - The illuminator is configured to produce a standing wave of input radiation at the analysis location - The detector arrangement comprises exactly two interferometric detection branches.