Scanning Microscope Multi-Spot Illumination Dynamic Range
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Solution Overview
Problem
Current scanning microscopy techniques face limitations in dynamic range, leading to inadequate resolution of both dark and bright image regions, temporal resolution issues, and photodamage due to intensive illumination, particularly in HDR and DI microscopy.
Innovation Solution
The method involves scanning a specimen with multiple illumination spots in a single line, allowing independent adjustment of each spot's intensity, using optical separating devices and scanning devices to guide these spots sequentially, and employing detectors for independent light emission detection from adjacent specimen locations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If multiple images are recorded successively with different excitation intensities for HDR microscopy, then the dynamic range is improved, but the temporal resolution deteriorates and measurement time increases
Solution Approach 1:
The invention divides a single image recording into multiple parallel scan lines, each illuminated by a different illumination spot with distinct intensity settings. This segmentation allows simultaneous acquisition of multiple intensity levels within a single temporal frame, resolving the trade-off between dynamic range and temporal resolution
Solution Approach 2:
The invention transitions from temporal multiplexing (recording multiple images sequentially in time) to spatial multiplexing (recording multiple intensity levels simultaneously across different spatial locations). By assigning different illumination intensities to different scan lines, the system captures high dynamic range information without temporal overhead
2Measurement precision
If intensive illumination is used to improve signal detection, then the signal-to-noise ratio is improved, but photodamage and bleaching effects increase
Solution Approach 1:
The invention applies different illumination intensities to different spatial regions (scan lines) based on local requirements. Bright structures receive lower illumination intensity to minimize photodamage, while dark structures receive higher intensity to maintain detectability. This local adaptation of illumination quality optimizes the signal-to-noise ratio while reducing overall photodamage
Solution Approach 2:
The system dynamically adjusts the illumination intensity parameter for each scan line based on the brightness characteristics of the structures being imaged. By changing the illumination parameter locally rather than using uniform intensive illumination, the system maintains adequate signal-to-noise ratio while minimizing photodamage and bleaching effects
3Device complexity
If a single excitation beam is used for sequential image recording, then the device complexity is reduced, but the productivity and recording speed are limited
Solution Approach 1:
The invention segments the single excitation beam into multiple parallel illumination beams using optical separating devices. Each illumination beam independently illuminates a different scan line, enabling simultaneous acquisition of multiple image lines. This segmentation increases recording speed without significantly increasing overall system complexity
Solution Approach 2:
The optical separating device serves multiple functions: it divides the single excitation beam into multiple beams, maintains wavelength separation, and enables parallel scanning. This multi-functionality achieves increased productivity while keeping the illumination system relatively simple
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 enhances temporal dynamic range, reduces bleaching, and maintains a high signal-to-noise ratio, enabling the observation of rapid biological processes with improved image recording efficiency and reduced control speed requirements.
Implementation Method 1
an optical separating device for spatially separating the excitation light into a plurality of illumination beams
Implementation Method 2
the light emitted by one specimen location irradiated with one illumination spot is detected independently
Data Source
AI summary
The disclosure relates to a method for scanning microscopy wherein a specimen is scanned simultaneously with a plurality of illumination spots of an excitation light. The light emitted by one specimen location irradiated with one illumination spot is detected independently of the light emitted by another specimen location illuminated with another illumination spot. A microscopic image of the specimen can be compiled from the emitted light detected for the different specimen locations. The method provides that the intensities of the different illumination spots are set independently of one another, and in that the illumination spots are guided over the specimen one after another in a scan line. The disclosure additionally relates to a scanning microscope.