Multi-probe FD-OCT Gauge for Slab Thickness and Topography
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing frequency domain optical coherence tomography (FD-OCT) probes face limitations in throughput due to slow data-acquisition speed and fail to account for vibrations during slab characterization, leading to inaccurate measurements.
Innovation Solution
A system utilizing multiple synchronized FD-OCT probes with a centralized actuation mechanism for simultaneous irradiation and detection, coupled with a spectral-analysis module to analyze interference patterns for precise determination of slab thickness and topography, while minimizing the impact of vibrations through synchronized operation and fast handling mechanisms.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If multiple FD-OCT probes are used for characterization, then measurement precision is improved, but data-acquisition speed deteriorates due to independent operation of probes
Solution Approach 1:
The patent combines multiple FD-OCT probes into a single integrated multi-probe gauge system with a shared actuation mechanism and synchronized detection system. This merging allows multiple probes to operate simultaneously and independently while maintaining coordinated measurement, thereby improving throughput without sacrificing measurement precision.
2Ease of operation
If conventional slab handling mechanisms are used, then ease of operation is maintained, but measurement reliability deteriorates due to vibration influence during characterization
Solution Approach 1:
The system performs preliminary synchronization of probe actuation before measurement begins. The centralized actuation mechanism pre-coordinates all probes to fire simultaneously, and the system captures data during a brief stable period before vibration significantly affects the slab position, thereby maintaining reliability while preserving ease of operation.
3Productivity
If fast handling mechanisms are implemented, then productivity is improved, but measurement precision deteriorates due to increased vibration
Solution Approach 1:
The system employs periodic pulsed illumination from the FD-OCT probes synchronized with the slab handling cycle. By activating probes at specific periodic intervals during the handling process, the system captures measurement data during brief stable windows, thereby maintaining precision while enabling fast throughput through continuous periodic measurement cycles.
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 system achieves increased throughput and reduces measurement errors caused by vibrations, enabling precise characterization of slab properties with improved data-acquisition speed and reduced noise.
Implementation Method 1
detecting radiation reflected from the slab of material or transmitted there-through... analyze an interference pattern of the radiation detected by each of the OCT probes
Implementation Method 2
frequency-domain optical-coherence tomography (OCT) probes configured to irradiating the slab of material... detecting radiation
Data Source
AI summary
The present subject matter at-least provides an apparatus for characterization of a slab of a material. The apparatus comprises a plurality of frequency-domain optical-coherence tomography (FD-OCT) probes configured for irradiating the slab of material at at-least one location, and detecting radiation reflected from the slab of material or transmitted there-through. Further, a centralized actuation-mechanism is connected to the plurality of OCT probes for simultaneously actuating one or more elements in each of said OCT probes to at-least cause a synchronized detection of the radiation from the slab of material. A spectral-analysis module is provided for analyzing at least an interference pattern with respect to each of said OCT probes to thereby determine at least one of thickness and topography of the slab of the material.