Microscope Stage Flexural Axis Reduces Cross-Coupling
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Solution Overview
Problem
Conventional microscope stages face challenges with high repeatability errors and cross-coupling translations due to over-constrained linear slide configurations, leading to increased costs and complexity.
Innovation Solution
A microscope stage utilizing a flexural design for Z axis motion, where a single Z plate is pivotally mounted on flexural components, reducing the need for multiple linear slides and simplifying assembly, thereby minimizing cross-coupling translations and enhancing repeatability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple linear slides in a ramp configuration are used to guide Z translation, then Z axis motion is achieved, but the system becomes over-constrained causing binding and high repeatability errors
Solution Approach 1:
The patent removes multiple linear slides from the system and replaces them with a single flexural component. This extraction of the over-constraining elements eliminates the binding and repeatability errors while maintaining the essential Z translation function through the flexible deformation of the single flexural component.
Solution Approach 2:
The patent changes the mechanical parameter from rigid linear slides to a flexible flexural component. This parameter change allows the system to accommodate Z translation through controlled flexing rather than rigid constraints, eliminating the over-constraint binding and improving repeatability.
2Ease of manufacture
If multiple linear slides and custom machined plates are used, then Z axis translation is enabled, but manufacturing cost and assembly complexity increase
Solution Approach 1:
The patent merges the functions of multiple linear slides and custom machined plates into a single flexural component. This consolidation reduces the quantity of parts, simplifies assembly procedures, and lowers manufacturing costs while maintaining the Z translation capability.
Solution Approach 2:
The single flexural component performs multiple functions that previously required separate components: it provides Z translation guidance, acts as a mechanical linkage, and eliminates the need for custom machined plates. This multi-functionality reduces both component quantity and assembly complexity.
3Measurement precision
If conventional linear slide configurations are used, then Z translation is achieved, but cross-coupling between Z and X/Y axes occurs distorting imaging data
Solution Approach 1:
The patent employs a dynamic flexural component that flexes in a controlled manner during Z translation. This dynamic deformation allows the system to achieve accurate Z translation while the flexible nature of the component naturally accommodates and minimizes cross-coupling effects compared to rigid linear slide configurations.
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
The flexural design achieves predictable Z translation characteristics, limited cross-coupling, and high repeatability, while reducing assembly time and component costs, with test results comparable to traditional stages in microscopy applications.
Implementation Method 1
a first flexural component (160) configured and operative to allow rotation of the Z plate (120) about a hinge axis (170)
Data Source
AI summary
A microscope stage with a flexural axis may exhibit predictable flexure characteristics and limited cross-coupling translations. Z motion of a Z plate proximate to a Z actuator may be substantially linear, while a distal side of the Z plate may be allowed to rotate about a hinge axis associated with a flexural component.