Spectrometer Aperture Geometry Optimization for Image Defect Reduction
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Solution Overview
Problem
Conventional aperture geometries in spectrometers are not optimally suited to the beam path, limiting the utilization of aperture diaphragms' advantages in reducing image defects and optimizing spectrometer characteristics.
Innovation Solution
A method for adapting the aperture geometry of an aperture diaphragm to the beam path by using an optical model with free parameters, a quality function, and optimization algorithms to determine the optimal aperture shape based on quality criteria, followed by producing the aperture diaphragm with the adapted geometry.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If conventional aperture geometries (circular, elliptical, or rectangular) are used, then the aperture diaphragm can be easily manufactured and installed, but the aperture geometry is not optimally suited to the beam path, limiting the utilization of aperture diaphragms' advantages in reducing image defects and optimizing spectrometer characteristics
Solution Approach 1:
The patent applies parameter changes by transitioning from fixed conventional aperture geometries to optimized geometries with specific mathematical parameters. The aperture geometry is defined by parameters such as radius, eccentricity, and orientation angles that are optimized to match the beam path characteristics. This allows the aperture to be precisely adapted to the spectrometer's optical system while maintaining manufacturability through defined geometric parameters.
Solution Approach 2:
The patent implements local quality by creating an aperture geometry that is specifically tailored to the local beam path characteristics at different positions. The optimized aperture shape accounts for the specific angular distribution and spatial characteristics of the beam at the aperture location, ensuring that each region of the aperture contributes optimally to reducing image defects and improving spectrometer performance.
2Device complexity
If conventional aperture geometries are used, then the aperture diaphragm structure remains simple, but image defects and suboptimal spectrometer characteristics result
Solution Approach 1:
The patent changes the geometric parameters of the aperture from standard shapes to optimized shapes defined by mathematical expressions involving parameters like radius, eccentricity, and orientation. This parameter optimization improves spectrometer performance and reduces image defects while maintaining a relatively simple aperture diaphragm structure that can still be manufactured and installed without excessive complexity.
3Reliability
If the aperture geometry is optimized to the beam path, then image defects are reduced and spectrometer characteristics are optimized, but the aperture diaphragm requires customized geometry that complicates manufacturing
Solution Approach 1:
The patent defines the optimized aperture geometry using a limited set of mathematical parameters that can be calculated and specified in advance. This approach allows for customized aperture shapes that are precisely adapted to the beam path while maintaining ease of manufacture through well-defined geometric parameters that can be directly used in manufacturing processes.
Solution Approach 2:
The patent applies preliminary action by calculating and determining the optimal aperture geometry parameters before the actual manufacturing process. The optimization is performed in advance using the optical model and beam path characteristics, so that the manufactured aperture can be produced directly from these pre-determined parameters without requiring complex adjustments or modifications during manufacturing.
Data Source
AI summary
A method for adapting an aperture geometry of an aperture of an aperture diaphragm to a beam path of light beams in a spectrometer includes providing an optical model that describes the beam path and that includes the optical components and their positions and orientations, wherein the optical model includes a first free parameter set that describes the aperture geometry and that includes a plurality of first free parameters, establishing a quality function that comprises at least one quality criterion of the beam path and is embodied to calculate a quality measure based on the optical model, inserting a plurality of sets of values for the first free parameter set and calculating the quality measure for each set of values, and determining the aperture geometry by selecting that set of values of the first free parameter set for which the lowest value of the quality measure was calculated.