Laser Beam Profile Feedback Control for Optical Path Deviation
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Solution Overview
Problem
Existing laser devices experience fluctuations in the beam profile of laser light due to deviations in the optical path, which affects the accuracy and consistency of laser processing.
Innovation Solution
A laser device equipped with a control unit that continuously monitors the beam profile and adjusts the optical system, specifically the position and angle of the second reflecting mirror and the condensing lens, to maintain a desired beam profile.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the optical system is used to guide laser light to the object, then the laser processing can be performed, but the beam profile fluctuates due to optical path deviation
Solution Approach 1:
The patent implements a feedback control mechanism where the beam profile is detected by a profile detection unit and fed back to a control unit. The control unit then adjusts the optical system (specifically the second reflecting mirror and condensing lens) to correct deviations and maintain the desired beam profile, thereby resolving the contradiction between reliability and manufacturing precision.
Solution Approach 2:
The patent makes the optical system dynamic by enabling continuous adjustment of the second reflecting mirror and condensing lens positions. This dynamic adjustment allows the system to adapt to optical path deviations in real-time, maintaining beam profile accuracy despite environmental changes or mechanical instabilities.
2Manufacturing precision
If the optical system components are fixed, then the device structure is simple, but the beam profile cannot be corrected when optical path deviation occurs
Solution Approach 1:
The patent introduces dynamic adjustment capabilities for the second reflecting mirror and condensing lens, allowing them to move to correct beam profile deviations. This dynamic element adds complexity but enables precise beam profile control when optical path deviations occur.
Solution Approach 2:
The feedback control system continuously monitors the beam profile and automatically adjusts the optical components to maintain desired specifications. This closed-loop control adds structural complexity but ensures high manufacturing precision by correcting deviations in real-time.
3Reliability
If continuous monitoring and adjustment is implemented, then the beam profile stability is improved, but the control complexity increases
Solution Approach 1:
The patent implements continuous feedback control where the profile detection unit monitors the beam profile and the control unit adjusts the optical system accordingly. This feedback mechanism improves beam profile stability by continuously correcting deviations, though it increases control system complexity.
Solution Approach 2:
The system performs self-correction by automatically detecting beam profile deviations and adjusting its own optical components without external intervention. This self-service capability improves reliability while minimizing the need for external control complexity.
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 solution effectively reduces fluctuations in the beam profile, enhancing the accuracy and consistency of laser processing by continuously adjusting the optical system to match the desired beam profile.
Implementation Method 1
a laser source configured to emit laser light LB
Implementation Method 2
an optical system configured to irradiate the object with the laser light emitted from the laser source, and capable of changing a beam profile of the laser light projected on the object
Implementation Method 3
the optical system, specifically the position and angle of the second reflecting mirror and the condensing lens
Data Source
Figure 1
Figure 2
Figure 3(A)~3(C)
AI summary
A laser source (101) emits laser light (LB). An optical system (102) is configured to irradiate an object (20) with the laser light (LB) emitted from the laser source (101), and capable of changing a beam profile of the laser light (LB) projected onto the object (20). A profile detection unit (103) detects the beam profile of the laser light (LB) emitted from the optical system (102) to the object (20). A control unit (14) controls the optical system (102) in each predetermined control cycle so that the beam profile detected by the profile detection unit (103) is a desired beam profile.