Optical Measuring Apparatus Dynamic Position Correction
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Solution Overview
Problem
Existing optical measuring apparatuses face challenges in obtaining accurate spectra when the positional relationship between the object and the detector changes, due to factors like movement of the object or detector vibrations, leading to complications in hyper-spectral imaging and interferometry.
Innovation Solution
An optical measuring apparatus and method that utilize a Michelson interferometer configuration with a phase changing part and a phase fixing part, along with a controller to correct luminance values and construct interferograms, enabling accurate spectrum acquisition even with dynamic positional changes between the object and detector.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the object or detector moves during measurement, then the measurement speed and adaptability improve, but the spectral measurement accuracy deteriorates due to positional changes
Solution Approach 1:
The system uses an imaging device to capture the position of the object in each interferogram, then feeds this positional information back to the controller. The controller uses this feedback to identify and correct positional shifts by selecting appropriate reference points from reference images, thereby maintaining spectral measurement accuracy even when the object moves during measurement.
Solution Approach 2:
The system captures reference images of the object at known positions before spectral measurement begins. These reference images are stored in advance and used later for comparing and correcting positional shifts in the interferograms, allowing the system to compensate for movement without requiring real-time stabilization.
2Adaptability or versatility
If the positional relationship between object and detector changes, then the adaptability to dynamic environments improves, but the interferogram quality and spectrum accuracy worsen
Solution Approach 1:
The imaging device continuously monitors the object's position and provides feedback to the controller. This feedback mechanism allows the system to adapt to dynamic environmental changes by detecting positional shifts and correcting them through reference point selection, thereby maintaining interferogram quality and spectral accuracy in dynamic environments.
Solution Approach 2:
The system creates reference copies of the object's appearance at known positions through reference images. These copies serve as templates for comparing against interferogram images, allowing the system to identify and correct positional shifts by finding the best match between the current interferogram and the stored reference copies.
3Ease of operation
If vibration or movement occurs during measurement, then the ease of operation in dynamic conditions improves, but the measurement precision and spectral accuracy deteriorate
Solution Approach 1:
The system performs self-correction by automatically detecting positional shifts through image comparison and adjusting the reference points accordingly. The controller autonomously identifies the appropriate reference points from stored reference images based on the detected positional changes, eliminating the need for manual intervention and maintaining spectral accuracy despite vibrations or movements during measurement.
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
Enables accurate spectrum measurement and interferogram construction, even when the object or detector is moving, by correcting for positional changes and maintaining phase consistency, thus improving the reliability of spectral information obtained.
Implementation Method 1
a splitting part that splits the light from the light source to the transmitted light transmitted through the object to be measured or the light from the light source to the reflected light reflected by the object to be measured
Implementation Method 2
a phase changing part that changes a phase of a first light which is one of the lights split by the splitting part
Implementation Method 3
a multiplexer that multiplexes and causes interference between the first light output from the phase changing part and the second light output from the phase fixing part
Implementation Method 4
a detector that detects the light output from the multiplexer
Data Source
AI summary
Optical measuring apparatus includes: a light source irradiating an object to be measured; a splitter splitting transmitted light or reflected light from the object to be measured; a phase changer changing a phase of a first light which is one of the lights split; a phase fixer maintaining a phase of a second light which is the other light split; a multiplexer multiplexing lights output from the phase changer and the phase fixer; a detector detecting the light (interference image) output from the multiplexer; and a controller that extracts a reference point from the interference image, when a displacement of the reference point is detected, corrects a luminance value for each pixel of the interference images in accordance with a displacement of the object to be measured indicated by a displacement of the reference point, constructs an interferogram based on the luminance value for each pixel of the interference images after the correction.