Beta-Tilt Sample Holder for Precision Microscopy
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Summary
Problems
Current double tilt holders in charged particle microscopes exhibit hysteresis up to 1.5 μm, leading to unpredictable sample position changes and image drift, limiting automation and precision in sample navigation.
Innovation solutions
A beta-tilt TEM sample holder with flexure-based kinematic guidance, including S-flexures and V-flexures, reduces hysteresis by minimizing friction and incorporating a tuned-mass damper to stabilize sample motion, while maintaining components at ambient pressure to avoid vacuum-related instabilities.
TRIZ Analysis
Specific contradictions:
General conflict description:
Principle concept:
If traditional double tilt holders are used, then the structure is simple and easy to manufacture, but hysteresis reaches up to 1.5 μm causing unpredictable sample position changes
Why choose this principle:
The holder is divided into multiple independent components: front lever arm, rear lever arm, sample cradle, and flexure elements. Each component performs a specific function and can be manufactured separately with high precision, then assembled to achieve low hysteresis overall while maintaining manufacturing feasibility through modular production
Principle concept:
If traditional double tilt holders are used, then the structure is simple and easy to manufacture, but hysteresis reaches up to 1.5 μm causing unpredictable sample position changes
Why choose this principle:
Traditional friction-based mechanical joints are replaced with flexure-based kinematic guidance that uses elastic deformation instead of sliding contact. The S-flexure and V-flexure elements eliminate friction-induced hysteresis by providing frictionless pivot points through controlled bending, achieving sub-micron precision without complex mechanical interfaces
Application Domain
Data Source
AI summary:
A beta-tilt TEM sample holder with flexure-based kinematic guidance, including S-flexures and V-flexures, reduces hysteresis by minimizing friction and incorporating a tuned-mass damper to stabilize sample motion, while maintaining components at ambient pressure to avoid vacuum-related instabilities.
Abstract
Aspects of a sample holder configured for an analytical instrument system, as well as components and methods for reproducible sample motion are described. An apparatus for coupling a specimen with an instrument can include a rear lever arm, a front lever arm, coupled with the rear lever arm, and a sample cradle, coupled with the front lever arm via an S-flexure.