Optical System Aperture Calibration for Barcode Verification
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Solution Overview
Problem
Conventional printers face challenges in achieving high visual clarity and print quality, particularly in verifying barcode quality, due to variations in effective aperture sizes of optical sensors, which can lead to inaccurate grading and faulty verification of printed images.
Innovation Solution
A system and method for calculating and calibrating the effective aperture size of an optical sensor by scanning a test pattern, using a reference graph to interpolate the aperture size based on element-reflectance values, and adjusting thermal management settings to ensure accurate print quality validation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional optical sensors are used for barcode verification, then printing can be performed, but accurate verification of barcode quality cannot be achieved due to variations in effective aperture sizes
Solution Approach 1:
The patent changes the parameter of effective aperture size by providing a plurality of optical sensors with different aperture sizes (first, second, and third aperture sizes) to scan different regions of the printed image, thereby achieving accurate verification across varying barcode densities and sizes
Solution Approach 2:
The patent segments the printed image into different regions (first region, second region, third region) that are scanned by different optical sensors with appropriately matched aperture sizes, allowing each sensor to optimize its measurement for its specific region's characteristics
2Measurement precision
If a single aperture size is used for scanning, then device complexity is reduced, but measurement precision across different image regions deteriorates
Solution Approach 1:
The patent implements a dynamic selection mechanism where the controller automatically selects which optical sensor to use based on the characteristics of the barcode region being scanned, allowing the system to adapt its aperture size dynamically rather than using a fixed single aperture
Solution Approach 2:
The controller acts as an intermediary that manages the plurality of optical sensors with different aperture sizes, selecting and coordinating the appropriate sensor for each scanning task based on image region characteristics, thereby simplifying the user interface while maintaining measurement 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
Ensures accurate verification of barcode quality by determining the effective aperture size, allowing for precise calibration and compliance with verification standards, thereby improving the visual clarity and readability of printed documents.
Implementation Method 1
scanning a test pattern to obtain a scan reflectance profile
Data Source
AI summary
Techniques for characterizing an optical system (for example, a printer verifier) are provided. In this regard, the optical system may be characterized for scanning a printer image. The characterization of the optical system includes determining an effective aperture size of the optical system, and correspondingly an effective resolution at which the optical system can be configured to scan a portion of the printer image according to verification requirements.