Measurement Light Calibration Using a Rotatable Reflector
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Solution Overview
Problem
Existing measurement systems face challenges in improving measurement accuracy, particularly in measuring the position of a measurement target object, as they struggle with precise control of measurement light irradiation and calibration.
Innovation Solution
A measurement system that includes an irradiation apparatus, a control apparatus, and a detector, where the control apparatus calibrates the irradiation direction of measurement light based on detected reflected light to enhance position measurement accuracy, utilizing a reflective member that can rotate around two axes to adjust the light path.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If calibration is performed using a fixed reflector position, then the calibration process is simple, but measurement accuracy deteriorates due to inability to compensate for irradiation direction errors
Solution Approach 1:
The reflector is made rotatable around a rotational axis to dynamically adjust its orientation. This allows the reflector to change its reflective direction based on calibration requirements, enabling compensation for irradiation direction errors without requiring multiple fixed reflectors or complex repositioning mechanisms.
Solution Approach 2:
The system uses detected reflected light from the reflector to provide feedback for calibration. The control apparatus adjusts the reflector's rotational position and the irradiation apparatus's emission direction based on this feedback, iteratively improving measurement accuracy by compensating for directional errors.
2Measurement precision
If the irradiation direction of measurement light is not calibrated, then the system operation is simple, but measurement accuracy deteriorates due to control errors
Solution Approach 1:
The control apparatus automatically performs calibration by detecting reflected light from the reflector and using this feedback to adjust control information for the irradiation apparatus. This automated feedback-based calibration improves measurement accuracy while minimizing manual intervention requirements.
Solution Approach 2:
The system performs self-calibration using its own components (irradiation apparatus, reflector, detector). The control apparatus automatically adjusts the irradiation direction based on detected reflected light, enabling the system to calibrate itself without requiring external calibration equipment or complex manual procedures.
3Measurement precision
If a single-axis rotational reflector is used, then the device structure is simple, but measurement accuracy deteriorates due to limited adjustment range
Solution Approach 1:
The reflector is configured to rotate around a rotational axis, providing dynamic adjustment capability. This single-axis rotation is sufficient to compensate for irradiation direction errors in the measurement system while maintaining relatively simple mechanical structure compared to multi-axis systems.
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 improved measurement accuracy by precisely controlling the irradiation direction of measurement light, enhancing the calibration process and enabling more accurate position measurement of the target object.
Implementation Method 1
at least one reflector that reflects the calibration light from the irradiation apparatus
Implementation Method 2
a detector that detects reflected light of the calibration light from the at least one reflector
Implementation Method 3
an irradiation apparatus that emits measurement light
Data Source
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AI summary
A measurement system SYS irradiates measurement light ML onto an object MT to measures a position of the object. The measurement system includes: an irradiation apparatus 13 that emits calibration light CL; a control apparatus 2 that controls the irradiation apparatus; a reflector 17 that reflects the calibration light; and a detector 14 that detects reflected light CRL from the at least one reflector, the irradiation apparatus is configured to emit the measurement light, the control apparatus is configured to control an irradiation direction of the measurement light, and the control apparatus calibrates, based on a detected result of the reflected light by the detector, control information for controlling the irradiation direction of the measurement light.