Synchronized Stage Movement for FTIR Spectrometer
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Solution Overview
Problem
Current FTIR spectrometer systems face challenges in efficiently and quickly acquiring images from multiple locations on a sample, despite previous efforts to increase speed and simplify the process.
Innovation Solution
A system and method that synchronizes the movement of a sample stage with the data collection periods of a spectrometer, using notifications to initiate stage movement between scan locations, allowing for efficient image acquisition during both forward and reverse sweeps of the interferometer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If the sample stage moves continuously during interferometer sweeps, then image acquisition speed is improved, but data collection quality deteriorates due to insufficient sampling time
Solution Approach 1:
The system uses periodic interferometer sweeps (forward and reverse directions) to collect spectral data at multiple sample positions. The sample stage moves to different locations during non-data collection periods, creating a periodic pattern of data acquisition followed by stage repositioning. This allows continuous image building without compromising data quality at each position.
Solution Approach 2:
The system performs preliminary data collection during forward sweeps, then uses the reverse sweep period to move the sample stage to the next position before the next forward sweep begins. This preliminary action of collecting data during forward sweeps allows the stage to be repositioned during the reverse sweep without interrupting the data acquisition flow.
2Productivity
If the interferometer performs operations during reverse sweeps, then productivity is improved, but device complexity increases
Solution Approach 1:
The interferometer system is designed to perform dual functions during forward and reverse sweeps: data collection during forward sweeps and stage repositioning during reverse sweeps. This multi-functionality allows the same hardware to efficiently handle both data acquisition and sample positioning without requiring separate dedicated systems, thereby improving productivity while managing complexity.
Solution Approach 2:
The system uses feedback signals from the interferometer to trigger sample stage movements. When the interferometer completes a forward sweep and begins the reverse sweep, a feedback signal initiates the stage movement to the next position. This feedback-based synchronization ensures coordinated operation between data collection and stage positioning, improving efficiency while using simple control logic.
3Measurement precision
If data is collected only during forward sweeps, then measurement precision is maintained, but loss of time increases due to idle reverse sweeps
Solution Approach 1:
The system eliminates idle time during reverse sweeps by continuously performing useful actions: while the interferometer performs the reverse sweep, the sample stage simultaneously moves to the next position. This continuity ensures that no time is wasted during reverse sweeps, as both the interferometer and stage are productively engaged in their respective tasks, maintaining measurement precision while reducing total acquisition time.
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 minimizes the time required to collect images by optimizing the sample stage movement during non-data collection periods of the spectrometer, enhancing the speed and efficiency of image acquisition from multiple sample locations.
Implementation Method 1
The interferometer system, in combination with the sample, modulates the intensity of the infrared radiation that impinges on the detector
Implementation Method 2
It is the function of the detector to convert this time variant intensity signal to a corresponding time varying current
Data Source
AI summary
An embodiment of a microscope system is described that comprises a sample stage configured to position a sample; and a spectrometer comprising an interferometer configure to provide a light beam to the sample stage and one or more detectors configured to detect light spectra in response to the light beam, wherein the spectrometer sends a notification to the sample stage after a scan comprising an acceptable measure of quality has been acquired from the detected light spectra at a first location, and the sample stage is further configured to count the notifications and initiate movement of the sample stage to a second location when a count value reaches a pre-determined number.