Laser Focal Adjustment With Incident Position Correction
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Solution Overview
Problem
In optical processing devices, accurately aligning the focal position of laser light with a surface of an object having a concave and convex or curved shape is challenging, leading to reduced accuracy in laser processing.
Innovation Solution
An optical device with a focal position adjustment mechanism, an incident position adjustment mechanism, and a control unit that corrects shifts in the incident position based on changes in the focal position, ensuring precise alignment and processing accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the focal position is adjusted to match curved or concave-convex surfaces, then the laser processing accuracy is improved, but the incident position shifts causing reduced precision
Solution Approach 1:
The control unit receives detection signals from the incident position detection unit and automatically adjusts the incident position adjustment mechanism to correct any shift in incident position caused by focal position changes, forming a closed-loop feedback system that maintains both focus accuracy and incident position precision
Solution Approach 2:
The incident position adjustment mechanism acts as an intermediary between the focal position adjustment mechanism and the laser processing target, compensating for the side effects of focal adjustment by independently adjusting the incident position to maintain processing accuracy
2Adaptability or versatility
If a translation optical system with rotatable reflecting members is used, then light translation capability is improved, but the system complexity increases
Solution Approach 1:
The translation optical system with rotatable reflecting members performs multiple functions: it translates light in multiple directions and enables focal position adjustment, reducing the need for separate optical components and simplifying the overall system architecture despite the complexity of individual components
3Manufacturing precision
If the incident position is adjusted independently, then the alignment precision is improved, but the device complexity increases
Solution Approach 1:
The control unit merges the control of focal position adjustment and incident position adjustment into a single integrated control system, where the incident position adjustment is automatically controlled based on focal position detection, reducing the need for independent manual adjustment mechanisms
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 improves the accuracy of laser processing by maintaining precise alignment between the laser light and the object's surface, even when the object has complex shapes, thereby enhancing processing precision and reducing errors.
Implementation Method 1
laser light from a laser light source
Implementation Method 2
light reflected by the second reflecting surface
Implementation Method 3
condensing optical system which changes a focal position (z) of light to condense the light above a subject
Data Source
AI summary
In an optical device capable of adjusting a focal position of laser light, the accuracy of laser processing is improved. An optical device which processes a subject by irradiating the subject with laser light, includes: a focal position adjustment mechanism configured to adjust a focal position of the laser light; an incident position adjustment mechanism configured to adjust an incident position of the laser light incident on the subject in a direction perpendicular to a focal direction of the laser light; and a control unit configured to control driving of the focal position adjustment mechanism and the incident position adjustment mechanism, wherein the control unit controls the driving of the incident position adjustment mechanism based on an amount of driving of the focal position adjustment mechanism to correct a shift of the incident position due to change of the focal position.