Microscope Slide Scanner Synchronization for Motion Blur Reduction
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Solution Overview
Problem
Existing microscopy techniques face challenges in capturing high-quality digital images of small specimens due to issues like mechanical vibrations, motion blur, and the need for heavy and cumbersome equipment, which are not easily portable or efficient for distant destinations.
Innovation Solution
A scanning apparatus with a lightweight structure that uses a combination of a halogen lamp or LED light source, a diffuser, collector lens, diaphragm, condenser lens, and a camera sensor with a motorized stage and objective system for continuous focus adjustment, synchronized with a flash unit to eliminate motion blur and achieve sharp images across different focus distances.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional microscopy equipment is used to capture high-quality digital images, then image quality can be improved, but the equipment becomes heavy and cumbersome, reducing portability
Solution Approach 1:
The microscopy system is divided into separate functional modules: a lightweight camera unit with sensor, a separate illumination system with LED or halogen lamp, and a simple motorized stage. This segmentation allows each component to be optimized independently, reducing overall equipment weight while maintaining image quality through coordinated operation of the modules
Solution Approach 2:
The patent replaces heavy mechanical focusing and illumination systems with electronically controlled alternatives. A microprocessor controls the camera sensor exposure timing to synchronize with the flash, eliminating the need for heavy mechanical shutters and complex focusing mechanisms, thereby reducing equipment weight while preserving measurement precision
2Illumination intensity
If continuous illumination is used during image capture, then adequate lighting is provided, but motion blur occurs due to mechanical vibrations and specimen movement
Solution Approach 1:
The illumination system uses periodic flashing (stroboscopic illumination) synchronized with the camera sensor's exposure timing. The microprocessor controls the flash to occur at precise moments during the scanning process, providing adequate lighting only when needed for image capture. This periodic illumination freezes motion and eliminates blur caused by continuous movement during prolonged exposure
Solution Approach 2:
The system maintains continuous scanning motion of the stage and specimen while using periodic flash illumination. The useful action of scanning continues uninterrupted, while the flash provides instantaneous illumination at the precise moment of image capture, eliminating motion blur without stopping the scanning process or requiring heavy mechanical vibration damping
3Illumination intensity
If high-intensity continuous light is used for illumination, then sufficient light reaches the specimen, but the light source generates excessive heat
Solution Approach 1:
The illumination system uses periodic flashing instead of continuous high-intensity light. The microprocessor controls the LED or halogen lamp to emit brief flashes only during the short exposure periods when the camera sensor is capturing images. This reduces the total energy input and heat generation while providing sufficient illumination intensity during the brief moments when light is actually needed for image formation
Solution Approach 2:
The system changes the temporal parameters of illumination from continuous to pulsed operation. By controlling the duty cycle (ratio of flash duration to total cycle time), the system maintains high peak intensity for adequate illumination during exposure while dramatically reducing average power consumption and heat generation. The microprocessor adjusts flash timing and duration to optimize both image quality and thermal management
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 the capture of high-quality digital images with improved focus accuracy and reduced equipment weight, allowing for efficient scanning of specimens in various environments, including distant locations, by synchronizing the flash with image capture and using continuous focus motion.
Implementation Method 1
a flash unit configured to flash at a second rate, the first rate and the second rate being synchronized
Implementation Method 2
a camera sensor configured to capture a first plurality of images from a first position at a first rate
Implementation Method 3
an objective configured to change focus in continuous motion
Data Source
Figure 1
Figure 2
Figure 3a
AI summary
An apparatus for scanning microscope slides is provided. The apparatus comprises an objective (108); a specimen stage (111); a camera sensor (110) configured to capture a first plurality of images at a first rate while focus is changed in continuous motion; and a flash unit (101) configured to flash at a second rate, wherein the first rate and the second rate are synchronized.