Electron Microscope Aberration Direction Control
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Solution Overview
Problem
Conventional electron microscopes have poor operability for designating the direction of aberration, making it difficult to accurately introduce and correct aberrations, especially when they are small, and limiting the ability to intentionally introduce arbitrary aberrations.
Innovation Solution
An electron microscope with an optical system including an aberration correction device and a control unit that displays an indicator for designating the direction of aberration on an aberration pattern, allowing users to rotate the indicator to specify the aberration direction and control the aberration correction device to introduce the aberration of the specified type and magnitude.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If conventional electron microscope operation interface is used for designating aberration direction, then the system structure remains simple, but the ease of operation deteriorates
Solution Approach 1:
The patent uses a visual copy of the aberration pattern (such as a diffraction pattern or image) as the operational interface. The user designates aberration direction by interacting with this visual representation, which naturally reflects the physical aberration state. This copying approach makes the operation intuitive without requiring complex coordinate systems or numerical inputs.
Solution Approach 2:
The patent introduces an intermediary visual interface (the displayed aberration pattern with overlay indicators) that mediates between the user's intent and the actual aberration correction parameters. This intermediary layer translates simple user actions (like clicking or dragging on the displayed pattern) into precise aberration direction specifications, avoiding direct complex parameter manipulation.
2Productivity
If automation of aberration correction is implemented, then productivity improves, but the ability to handle arbitrary aberrations deteriorates
Solution Approach 1:
The patent creates a universal aberration correction system that can handle both standard automated correction cases and arbitrary user-specified aberrations through the same interface. The visual aberration pattern interface serves multiple functions: it displays the current aberration state, allows automated measurement, enables user designation of arbitrary directions, and provides feedback on correction results, all within a single unified system.
Solution Approach 2:
The system dynamically adapts its operation mode based on user needs. It can operate in fully automated mode for routine corrections, switch to semi-automated mode where users adjust specific parameters, or allow complete manual control for arbitrary aberration cases. The interface dynamically responds to different input types, maintaining versatility while preserving automation benefits.
Data Source
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AI summary
An electron microscope (100) includes: an optical system including an aberration correction device (30); and a control unit (40) that controls the aberration correction device (30), wherein the control unit (40) performs: processing for displaying, on a display unit (52), an indicator (4) for designating a direction of aberration in superposition on an aberration pattern representing a state of aberration, processing for specifying the direction of aberration from the indicator that has been subjected to a rotation operation, and processing for controlling the aberration correction device to cause the aberration correction device (30) to introduce an aberration in the specified direction.