Moiré Registration Structure for Microstructured Product Alignment
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Solution Overview
Problem
Existing methods for producing two-sided microstructured products face challenges in achieving high alignment accuracy between product features on opposite sides of a substrate, particularly in detecting translational and rotational deviations, which affects the registration and interaction of features in applications like holographic and display devices.
Innovation Solution
A method utilizing a registration structure with a moiré-type holographic representation, comprising arrays of focusing elements and reference objects on opposite sides of a substrate, which enhances registration accuracy by magnifying misalignments, allowing for both manual and automatic evaluation of deviations through intuitive visual means.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional alignment methods are used, then the manufacturing process is simple, but the registration accuracy between product features on opposite sides of the substrate is insufficient
Solution Approach 1:
The patent introduces a registration structure comprising a registration array of focusing elements and a registration array of reference objects as an intermediary system. This mediator enables precise alignment by creating optical relationships between product features on opposite sides of the substrate, allowing registration accuracy to be improved without fundamentally changing the manufacturing process complexity
Solution Approach 2:
The patent changes the optical parameters of the alignment system by utilizing focusing elements and reference objects that create specific optical paths and magnification effects. By adjusting focal lengths, distances, and optical configurations, the system achieves enhanced registration accuracy while maintaining practical device complexity
2Measurement precision
If high registration accuracy is achieved through conventional means, then alignment precision improves, but the ability to detect and evaluate translational and rotational deviations intuitively deteriorates
Solution Approach 1:
The patent employs optical effects that produce visible changes in the registration structure when misalignment occurs. The focusing elements and reference objects create optical signals that change in intensity, position, or pattern based on the degree of misalignment, enabling both precise measurement and intuitive visual evaluation of deviations
Solution Approach 2:
The patent replaces complex mechanical alignment indicators with optical-based detection methods. By using focusing elements and reference objects that create optical paths, the system achieves precise deviation detection through light interactions rather than mechanical means, improving both measurement precision and visual evaluability
3Productivity
If manual alignment methods are used, then the equipment complexity is low, but the registration accuracy and productivity deteriorate
Solution Approach 1:
The patent incorporates a registration structure that is pre-configured with focusing elements and reference objects in specific arrangements. This preliminary setup enables automated detection and alignment processes to occur efficiently during production, increasing productivity without requiring complex real-time adjustments or sophisticated equipment
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
This approach significantly improves registration accuracy, enabling precise alignment of product features on both sides of the substrate, facilitating enhanced interaction and quality control in microstructured products, with potential for registration resolutions of less than 0.1 μm and adaptable to various product types.
Implementation Method 1
A method utilizing a registration structure with a moiré-type holographic representation
Data Source
AI summary
The present invention provides a method of producing a two-sided microstructured product and a registration structure that can be used for the method. The method comprises the steps of: (800) providing primary product features (80) at a first surface of a substrate sheet (50); (810) providing secondary product features (90) at an opposed surface; (820) registering the mutual alignment of the primary and secondary product features (80, 90) to estimate alignment parameters; and (830) aligning the provision of primary and secondary product features (80, 90). The registration structure comprises a registration-array of focusing elements (20) at a first surface and a registration-array of reference objects (30) at an opposed surface aligned with primary and secondary product features (80,90) that provides a holographic representation (10) of the reference objects (30) in order to estimate the alignment of product features (80,90).