Tomographic Sectioning Depth Control via Inclined Reporting Device
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Solution Overview
Problem
Current tomographic sectioning methods face challenges in accurately measuring depth at small length scales due to limitations in mechanical measurement systems, which are often insensitive to structure parameters and have low resolution, making them unsuitable for objects smaller than 2 centimeters, and require external references or complex calibration processes.
Innovation Solution
A tomographic system that incorporates a reporting device with a planar high-contrast film inclined in the depth dimension, allowing for precise depth measurement and control during grinding and sectioning, using edge-detection algorithms for automated depth sensing and control, achieving resolutions as fine as 2.5 nanometers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If mechanical measurement systems are used for depth measurement during sectioning, then the system is simple to operate, but the measurement precision is limited to one micron at best
Solution Approach 1:
The patent replaces mechanical measurement systems with optical interferometry to achieve sub-micron depth measurement precision. The interferometry system uses light waves to measure the position of the sectioning blade relative to the object, enabling precision beyond the limitations of mechanical sensors while maintaining automated operation.
Solution Approach 2:
The patent introduces a reference plane as an intermediary element that reflects light back to the interferometry sensor. This reference plane serves as a mediator between the sectioning blade and the measurement system, enabling accurate depth measurements without requiring direct mechanical contact or complex calibration procedures.
2Measurement precision
If interferometry methods are used for depth measurement, then measurement precision improves significantly, but the device complexity and cost increase due to requiring external reference objects
Solution Approach 1:
The patent merges the reference plane functionality directly into the sectioning blade assembly. The reference plane is integrated as part of the blade structure rather than being a separate external component, eliminating the need for separate reference objects and reducing system complexity while maintaining interferometry-based precision measurement.
Solution Approach 2:
The sectioning blade is given multiple functions: it both sections the object and serves as the reference plane for interferometry measurements. This multi-functionality eliminates the need for separate reference components and simplifies the overall system architecture while maintaining high measurement precision.
3Productivity
If automated sectioning systems are used, then productivity increases, but measurement precision deteriorates due to inability to accurately determine depths at small length scales
Solution Approach 1:
The patent implements real-time feedback control by continuously monitoring the depth position of the sectioning blade using interferometry and adjusting the blade position accordingly. This closed-loop control system enables automated sectioning to achieve sub-micron precision by constantly comparing actual position with target position and making real-time corrections.
Data Source
AI summary
A tomographic system includes a reporting device colocated and juxtaposed an object so that both are ground through grinding to various sectioning depths as the reporting device is ground down exposing a reporting marker along a length of the reporting device for indicating the depth of sectioning for accurate precise depth of grinding well suited for precise sectioned tomographic imaging.