Interferometer Beam Alignment via 3D Spatial Modeling
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Solution Overview
Problem
Interferometric measurement apparatuses struggle to accurately align laser beams for vibration analysis, particularly in determining the direction and angle of vibration, as existing methods are cumbersome and prone to errors, requiring manual intervention and precise spatial coordinates for each measurement point.
Innovation Solution
A method involving the recording of spatially resolved images from multiple perspectives to create a three-dimensional model of the measurement object, allowing for the determination of spatial coordinates of alignment points and subsequent assignment of control parameters to direct the laser beam accurately at specified measurement points, reducing user error and increasing precision.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If manual alignment methods are used with precise spatial coordinates for each measurement point, then measurement precision is improved, but device complexity and ease of operation deteriorate
Solution Approach 1:
The patent replaces manual mechanical alignment procedures with an automated optical alignment system. The laser beam itself is used to visually indicate alignment status on the measurement object, eliminating the need for complex manual coordinate input and mechanical adjustment mechanisms. This substitution maintains high precision while dramatically simplifying the alignment process.
Solution Approach 2:
The alignment system uses the laser beam to automatically indicate its own position and alignment status on the measurement object. The beam's interaction with the object surface provides visual feedback that guides the alignment process without requiring external measurement tools or complex coordinate calculations, enabling the system to self-align.
2Productivity
If manual alignment procedures are used, then ease of operation deteriorates, but productivity is maintained through operator judgment
Solution Approach 1:
The patent replaces operator judgment and manual procedures with an automated optical system that provides real-time visual feedback. The laser beam's interaction with the measurement object creates visible indicators that automatically guide alignment, eliminating the need for operator interpretation and significantly improving both ease of operation and alignment speed.
Solution Approach 2:
The system provides real-time visual feedback through the laser beam's interaction with the measurement object. This feedback mechanism allows operators to immediately see alignment status and make rapid adjustments, dramatically improving ease of operation while increasing productivity through faster iterative alignment cycles.
3Measurement precision
If the laser beam path is not precisely aligned with the measurement object surface, then measurement precision deteriorates, but ease of operation improves by allowing greater alignment tolerance
Solution Approach 1:
The laser beam automatically indicates its own alignment status by interacting with the measurement object surface. The visual feedback from the beam's interaction provides real-time information about alignment quality, enabling operators to achieve precise alignment intuitively without requiring complex alignment procedures or being overly sensitive to minor misalignments.
Solution Approach 2:
The patent utilizes changes in the appearance of the laser beam interaction with the measurement object surface to indicate alignment quality. By observing visual characteristics of the beam's interaction, operators can determine when precise alignment is achieved without requiring strict mechanical tolerances or complex alignment procedures.
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
This approach simplifies the alignment process, enhances precision, and reduces the risk of incorrect alignment by using spatially resolved images to create a three-dimensional model, enabling accurate direction and angle determination of laser beams for vibration analysis.
Implementation Method 1
a beam source, preferably a laser beam source
Implementation Method 2
the measurement beam, which has been at least partially reflected or scattered by the measurement object
Implementation Method 3
the measurement beam, which has been at least partially reflected or scattered by the measurement object
Implementation Method 4
the measurement beam, which has been at least partially reflected or scattered by the measurement object, is superimposed with the reference beam on a detection surface of the detector such that a superimposition or interference signal between measurement beam and reference beam is measurable
Implementation Method 5
The frequency of the measurement beam is influenced by the movement or vibration of the object surface, and so conclusions can be drawn about the movement of the object, in particular the vibration frequency of the object surface
Data Source
AI summary
An alignment method for a beam-directing unit of an interferometric measuring device for directing a laser beam of a laser beam source towards a plurality of measurement points of an object under measurement, wherein a three-dimensional model of a measurement surface of an object under measurement is created by a plurality of spatially resolved images. A measuring device for carrying out an interferometric measurement by laser radiation is also provided, having a controller which is designed to align a beam-directing unit of the measurement device.