Polarized Optical Analysis of Tobacco Articles for Component Measurement
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Solution Overview
Problem
Existing optical analysis methods for tobacco industry articles suffer from undesired reflections and weak contrast due to metallic and lighter-colored components, making precise and reliable component identification and measurement difficult, especially when components are non-planar or not perpendicular to the light source.
Innovation Solution
Employing a polarized radiation source with a polarizing filter to selectively filter electromagnetic radiation based on oscillation direction, combined with a polarized detector to enhance image contrast and enable clear detection of components with defined edges and orientations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If conventional electromagnetic radiation is used for lighting the article, then the article can be illuminated, but undesired reflections and weak contrast occur making component identification difficult
Solution Approach 1:
The patent applies parameter changes by transitioning from conventional unpolarized electromagnetic radiation to polarized electromagnetic radiation. This changes the physical state of the lighting, allowing selective filtering of reflected radiation based on polarization orientation. The polarized lighting combined with polarized detection enables differentiation between components with different reflective properties, thereby improving image contrast and component identification without increasing illumination intensity.
Solution Approach 2:
The patent introduces a polarizing filter as an intermediary element between the electromagnetic radiation source and the article, and another polarizing filter between the article and the detector. These intermediary polarizing filters act as mediators that selectively transmit or block radiation based on polarization orientation, enabling the system to differentiate between different component materials and orientations while improving overall detection capability.
2Strength
If the article comprises metallic and/or metallized components, then the article has desired structural properties, but the image obtained has undesired reflections and weak contrast
Solution Approach 1:
The patent converts the harmful reflective property of metallic components into a beneficial detection feature. By using polarized radiation and polarized detection, the system exploits the different polarization responses of metallic versus non-metallic components. Metallic components maintain their structural integrity while their reflective behavior under polarized light creates distinct image signatures that enable reliable identification and measurement, transforming the previously harmful reflections into useful detection signals.
3Stability of the object's composition
If a component is placed substantially parallel to the light source and camera, then the article structure is maintained, but it is difficult to detect risking offset image
Solution Approach 1:
The patent adds the dimension of polarization analysis to the traditional optical detection approach. Instead of relying solely on spatial orientation and intensity variations, the system utilizes polarization orientation as an additional dimension of information. This allows the system to distinguish between components at different orientations, including those parallel to the light source and camera, by detecting the specific polarization patterns they produce, thereby achieving accurate dimensional measurements without compromising component orientation stability.
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
The method achieves precise and reliable dimensional, positional, and qualitative analysis of tobacco industry articles by enhancing image contrast and enabling clear identification of components, even those with three-dimensional development.
Implementation Method 1
a polarizing filter configured for selectively filtering the electromagnetic radiation emitted by the emitter based on the respective oscillation direction
Implementation Method 2
detecting, by means of a detector, the electromagnetic radiation reflected by the article
Data Source
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Figure 3A~4B
Figure 5A~5B
AI summary
A method for performing an optical analysis of an article (100) of the tobacco industry comprising a step of providing an article (100) of the tobacco industry and a step of providing an electromagnetic radiation emitter (200) comprising a polarizing filter (300) configured for selectively filtering the electromagnetic radiation emitted by the emitter (200) based on the respective oscillation direction. A method further comprises a step of lighting the article (100) by means of the emitter (200) so that the article (100) is lit with polarized radiation and a step of detecting, by means of a camera (400), the electromagnetic radiation reflected by the article (100). The method further comprises a step of generating an image of the article (100), based on the detected electromagnetic radiation.