Folding Mirror Calibration for Precise Laser Beam Control
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Solution Overview
Problem
Existing laser processing devices lack the capability to appropriately update correspondence relationship information between the state of laser light incident on an object and the inclination angle of the mirror's reflecting surface, which is crucial for precise control of laser light irradiation.
Innovation Solution
A laser device equipped with a folding mirror that adjusts its inclination angles in conjunction with a reference light system, a reference light receiver, and a controller for calibration processing, allowing for the updating of correspondence relationship information by observing the state of laser light and reference light outputs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If correspondence relationship information is prepared to control laser light state, then laser light control precision is improved, but the information becomes outdated when the relationship changes
Solution Approach 1:
The patent implements a feedback mechanism where the detection means detects the actual state of laser light incident on the object, and the control means updates the correspondence relationship information based on this detection. This closed-loop feedback ensures the information remains accurate and reliable even when conditions change, resolving the contradiction between initial precision and ongoing validity.
Solution Approach 2:
The patent performs preliminary calibration by detecting the laser light state at multiple inclination angles beforehand to establish the correspondence relationship information. This preliminary action prepares accurate reference data that enables precise control during actual operation, addressing both the need for initial precision and providing a basis for future updates.
2Manufacturing precision
If mirror inclination angle is adjusted to control laser light state, then processing precision is improved, but the correspondence relationship information becomes invalid
Solution Approach 1:
After adjusting the mirror inclination angle for precise processing, the detection means detects the new laser light state, and the control means updates the correspondence relationship information to reflect this change. This feedback loop prevents information loss by continuously synchronizing the stored information with the actual system state.
Solution Approach 2:
The system performs self-updating of the correspondence relationship information through its own detection and control means, without requiring external intervention. The laser device automatically detects changes in laser light state and updates its internal calibration data, making the system self-maintaining and preventing information obsolescence.
3Measurement precision
If detection means is added to detect laser light state, then control accuracy is improved, but device complexity increases
Solution Approach 1:
The detection means serves multiple functions: it detects laser light state for updating correspondence relationship information, monitors processing conditions, and provides feedback for control adjustments. This multi-functionality justifies the added complexity by providing comprehensive control capabilities from a single integrated system.
Solution Approach 2:
The patent combines the detection means, control means, and correspondence relationship information storage into an integrated control system. By merging these components into a unified architecture rather than separate systems, the patent reduces overall device complexity while maintaining high control accuracy through coordinated operation of the integrated components.
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 precise adjustment and updating of the correspondence relationship information, ensuring accurate control of the laser light's state and inclination angle, thereby improving the device's ability to maintain optimal processing conditions.
Implementation Method 1
a folding mirror 200 that includes a first reflecting surface 200a that reflects the laser light LB emitted from the laser light source 101 in a direction different from a traveling direction
Implementation Method 2
a condensing lens 400 that is disposed in an optical path of the laser light LB from the first reflecting surface 200a of the folding mirror 200 toward the end portion of the optical fiber 20 and condenses the laser light
Data Source
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AI summary
In the calibration processing, controller (14) makes an observation of a state of laser light (LB) incident on an object to be irradiated and an output of reference light receiver (300) while sequentially changing an inclination angle of first reflecting surface (200a) of folding mirror (200) with respect to an optical path of laser light (LB) incident on first reflecting surface (200a) of folding mirror (200). Based on a result of the observation, controller (14) updates correspondence relationship information indicating a correspondence relationship between a target state of laser light (LB) incident on the object to be irradiated and a target output of reference light receiver (300).