Wedge Prism and Dove Prism Rotation for Precise Laser Beam Trajectories
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing laser processing devices face challenges in controlling the diameter of a circular trajectory of a laser beam with high reproducibility due to large variations in the trajectory diameter with respect to changes in the incident angle of the laser beam, making precise control difficult.
Innovation Solution
A laser processing device that includes a first wedge prism, a Dove prism, and mechanisms to rotate these prisms around an optical axis, allowing for precise control of the incident angle and trajectory diameter through a combination of wedge prism rotating mechanisms and Dove prism rotations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the wedge prism is tilted to control the incident angle of the laser beam to the Dove prism, then the incident angle can be adjusted, but the diameter of the circular trajectory varies significantly with small changes in tilt angle, making precise control difficult
Solution Approach 1:
The invention changes the control parameter from tilt angle to rotation angle of the wedge prism. By rotating the wedge prism around the optical axis, the incident angle can be controlled with much finer resolution. The relationship between rotation angle and incident angle provides better control characteristics, allowing precise adjustment of the incident angle to the Dove prism while maintaining stable and reproducible trajectory diameter.
2Ease of operation
If the wedge prism is tilted to adjust the incident angle, then angle control is possible, but the trajectory diameter changes significantly, requiring minute control of one degree or less which is difficult to achieve
Solution Approach 1:
The invention transforms the control mechanism from tilting the wedge prism to rotating it around the optical axis. This parameter change provides several advantages: the rotation angle can be controlled with high precision using standard rotary actuators, the relationship between rotation angle and incident angle is more favorable for control, and the trajectory diameter remains stable. This makes the system easier to operate while achieving the required control precision.
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 control of the laser beam's incident angle and trajectory diameter with high reproducibility, facilitating accurate laser processing.
Implementation Method 1
a first wedge prism (41) that refracts incident laser beam (LB) with respect to an optical axis (OA)
Implementation Method 2
a Dove prism (46) that rotates the laser beam (LB) transmitted through the first wedge prism (41) around an optical axis (OA)
Data Source
AI summary
Provided is a laser machining device that can facilitate minute control on an incident angle of a laser beam on a dove prism. This laser turning device for turning an incident laser beam comprises: a first wedge prism that deflects the incident laser beam with respect to the optical axis thereof; a dove prism that causes the laser beam having transmitted through the first wedge prism to rotate about the optical axis thereof; a first wedge prism rotating mechanism that causes the first wedge prism to rotate about the optical axis; and a dove prism rotating mechanism that causes the dove prism to rotate about the optical axis.