Scanning Microscope with Scan Filter Array for Hyperspectral Imaging
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Solution Overview
Problem
Current scanning microscope technologies face challenges in efficiently producing hyperspectral and multispectral images of large specimens, particularly in achieving high signal-to-noise ratio and dynamic range, while also accommodating RGB and greyscale imaging.
Innovation Solution
A scanning microscope system with a movable specimen stage and an area detector equipped with a scan filter featuring a repeat pattern of bandpass filters, allowing for sequential overlapping frame images to be captured and averaged, resulting in hyperspectral and multispectral images with enhanced signal-to-noise ratio and dynamic range, along with simultaneous RGB and greyscale imaging capabilities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If sequential overlapping frame images are captured and averaged using MSIA scanning, then signal-to-noise ratio and dynamic range are improved, but imaging time and complexity increase
Solution Approach 1:
The scan filter array divides the detector into multiple rows, each with different bandpass filters for specific wavelength ranges. This segmentation allows simultaneous capture of multiple spectral channels in parallel, reducing the total imaging time while maintaining the signal-to-noise ratio benefits of averaging through the MSIA scanning process.
Solution Approach 2:
The system continuously captures sequential overlapping frame images during the scanning process, with the specimen stage moving continuously through the field of view. This continuous action allows efficient use of detection time and maintains high signal-to-noise ratio through cumulative averaging while minimizing idle time.
2Measurement precision
If a scan filter with repeat pattern of bandpass filters is used, then spectral resolution and dynamic range are improved, but device complexity increases
Solution Approach 1:
The scan filter array is divided into multiple rows, each with different bandpass filters for specific wavelength ranges. This segmentation allows simultaneous capture of multiple spectral channels in parallel, reducing the total imaging time while maintaining the signal-to-noise ratio benefits of averaging through the MSIA scanning process.
Solution Approach 2:
The scan filter array serves multiple functions: it enables hyperspectral imaging, multispectral imaging, RGB imaging, and greyscale imaging all through a single device configuration. The repeat pattern of bandpass filters can be selectively activated or combined to achieve different imaging modes, reducing the need for multiple separate devices.
3Area of stationary object
If MSIA scanning is used for large specimens, then field of view and imaging coverage are improved, but scanning time and processing complexity increase
Solution Approach 1:
The large specimen field of view is divided into multiple overlapping frame images captured during the scanning process. Each frame captures a portion of the specimen, and these segments are subsequently stitched together to form the complete image. This segmentation allows the system to manage large fields of view through manageable image segments while maintaining spectral information.
Solution Approach 2:
The scanning process moves continuously across the specimen, capturing overlapping frames without interruption. This continuous scanning of large specimens maintains high signal-to-noise ratio through cumulative averaging while efficiently covering the entire field of view, minimizing total scanning time compared to sequential single-frame acquisition.
4Adaptability or versatility
If multiple imaging modes (RGB, greyscale, hyperspectral, multispectral) are integrated, then versatility and adaptability are improved, but system complexity and difficulty of operation increase
Solution Approach 1:
The scan filter array serves multiple functions: it enables hyperspectral imaging, multispectral imaging, RGB imaging, and greyscale imaging all through a single device configuration. The repeat pattern of bandpass filters can be selectively activated or combined to achieve different imaging modes, reducing the need for multiple separate devices.
Solution Approach 2:
The system achieves different imaging modes by changing the spectral response parameters of the scan filter array. By adjusting which rows of the filter array are active and their corresponding bandpass characteristics, the system can switch between RGB, greyscale, hyperspectral, and multispectral imaging modes, providing versatility through parameter modification rather than physical reconfiguration.
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
The system effectively produces high-quality hyperspectral and multispectral images with improved signal-to-noise ratio and dynamic range, enabling detailed analysis of large specimens while integrating RGB and greyscale imaging, thus overcoming previous limitations.
Implementation Method 1
an area detector to capture sequential substantially overlapping frame images of the specimen
Implementation Method 2
each row of the repeat pattern being covered by a bandpass filter, there being a plurality of repeat patterns and a plurality of bandpass filters having the same bandwidth, each bandpass filter transmitting a narrow spectral range
Implementation Method 3
at least one lens that focuses light from the specimen onto an area detector
Data Source
AI summary
A scanning microscope and method of operation has a scan filter with a repeat pattern of a plurality of rows that is repeated at least across an active area of an entire surface of an area detector. Each row is covered by a bandpass filter or an emission filter for a specific fluorophore or filters of a particular colour for each row. The scanning microscope can be used to obtain one or more of hyperspectral images, multispectral images, RGB images, RGBW images, W images and Single Field Of View images of a specimen using Moving Specimen Image Averaging. A method of obtaining one or more of the images is also described.