Optical Registration Carrier for Precise Sampling Point Positioning
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Solution Overview
Problem
Existing optical sampling methods face challenges in accurately determining the positions of sampling points on a sample due to the absence of regular feature points, leading to position errors and image offsets when using open-loop motion and optical scanning devices, especially when samples need to be periodically observed over time.
Innovation Solution
A carrier with optical registration function that includes a body with inspected sites and address coding sites, where the address coding sites have micro-structures smaller than 100 microns, allowing for precise registration of sampling points with corresponding address codes, enabling accurate image capture and signal detection by synchronizing two beams focused on the sample and its address coding site.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If open-loop motion method is used for sampling, then device complexity is reduced, but measurement precision of sampling point positions deteriorates due to absence of regular feature points
Solution Approach 1:
The patent introduces an optical encoder as an intermediary component that provides regular feature points (encoding patterns) on the carrier. These patterns serve as reference markers that enable precise position measurement without complicating the motion control system, thus resolving the contradiction between device simplicity and measurement precision.
Solution Approach 2:
The patent implements feedback by using the optical encoder to continuously provide position information about the carrier's location. This feedback mechanism allows the system to accurately determine sampling point positions by referencing the encoded patterns, eliminating the need for complex open-loop control while maintaining simplicity.
2Adaptability or versatility
If coordinate transformation formulas are used to calculate sampling point addresses, then adaptability to different sampling methods is improved, but manufacturing precision of address determination deteriorates due to position errors amplification
Solution Approach 1:
The patent creates a direct optical copy of the carrier's position information through the optical encoder patterns. Instead of calculating addresses through complex coordinate transformations that amplify errors, the system directly reads the encoded position from the patterns, preserving manufacturing precision while maintaining adaptability.
3Adaptability or versatility
If sample is removed and repositioned for periodic observation, then adaptability to long-term observation needs is improved, but measurement precision of sampling point positions deteriorates due to position change and image offset
Solution Approach 1:
The patent applies preliminary action by pre-encoding the carrier with optical patterns that serve as permanent position references. These patterns are created in advance and remain fixed on the carrier, enabling the system to quickly and accurately re-establish position information after the carrier is removed and repositioned, thus maintaining measurement precision across multiple observation sessions.
Data Source
AI summary
A carrier with the optical registration function is disclosed. The carrier allows the registration of inspected results of the sampling images of the sample to the corresponding address codes of the address coding site of the carrier.