Electronic Display Calibration for Imaging Optical Units
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Solution Overview
Problem
Existing calibration methods for imaging optical units in metrological applications are inflexible and costly, requiring complex calibration bodies tailored to specific measurement tasks, and struggle to accurately calibrate for various aberrations and measurement objects of different sizes and types.
Innovation Solution
A method and device utilizing an electronic display with a matrix of pixels to generate multiple calibration patterns, including a calibration body with a defined line, allowing for flexible and cost-effective calibration by recording images of these patterns to quantify individual properties of the imaging optical unit and determine correction values for aberrations, with a transparent plate providing an absolute linear measure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If special calibration bodies with known properties are used for calibrating imaging optical units, then measurement precision is improved, but device complexity and manufacturing cost increase
Solution Approach 1:
The patent applies universality by using a single electronic display device that can generate multiple different calibration patterns (grid patterns, circular patterns, linear patterns) for various calibration purposes. This replaces the need for multiple specialized calibration bodies, reducing device complexity while maintaining calibration accuracy across different measurement tasks.
Solution Approach 2:
The patent uses an electronic display to create digital copies of calibration patterns instead of requiring physical calibration bodies with precisely manufactured features. The display generates images of grid lines, circles, and other geometric patterns that can be captured by the imaging optical unit, eliminating the need for physically manufacturing complex calibration artifacts with tight tolerances.
2Adaptability or versatility
If multiple specialized calibration bodies are provided for different measurement tasks, then adaptability is improved, but device complexity and cost increase
Solution Approach 1:
The electronic display serves multiple calibration functions by generating different patterns programmatically. The same display device can produce grid patterns for distortion calibration, circular patterns for radial distortion correction, and linear patterns for magnification calibration, making the system adaptable to various measurement tasks without requiring multiple physical calibration bodies.
Solution Approach 2:
The calibration system becomes dynamic through the electronic display, which can change calibration patterns on demand based on the measurement task. The display can switch between different geometric patterns, adjust pattern parameters, and adapt to different calibration requirements without physical reconfiguration, enabling flexible calibration for various workpiece sizes and types.
3Manufacturing precision
If high precision calibration bodies are manufactured, then manufacturing precision is improved, but manufacturing cost and time increase
Solution Approach 1:
The patent replaces physical manufacturing of precision calibration bodies with digital generation of calibration patterns on an electronic display. Instead of manufacturing glass plates or metal artifacts with precisely drilled holes or etched lines, the system uses software to generate images of these patterns, which are then displayed and captured by the imaging optical unit for calibration.
Solution Approach 2:
The patent substitutes mechanical manufacturing processes with electronic/digital processes. The calibration patterns are generated through software algorithms rather than physical machining, drilling, or etching. This replaces the mechanical system of calibration body fabrication with an electronic system that computes and displays calibration images, dramatically reducing manufacturing complexity and cost.
Data Source
AI summary
A calibration pattern having a plurality of pattern regions for calibrating an imaging optical unit for metrological applications. At least one image of the calibration pattern is recorded using the imaging optical unit. The image is evaluated to quantify individual properties of the imaging optical unit. Depending on the quantified individual properties, correction values for a calculated correction of aberrations of the imaging optical unit are determined. The calibration pattern is provided on an electronic display having a plurality of display pixels arranged in the form of a matrix. In addition, a calibration body with at least one line having a defined dimension, is recorded using the imaging optical unit. A magnification factor of the imaging optical unit is determined on the basis of the at least one line. At least one further individual property of the imaging optical unit is quantified on the basis of the calibration pattern.