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Researchers patent high-res system that makes normal cameras hyperspectral
Researchers from the Universidad Carlos III de Madrid’s (UC3M’s) Sensors and Instrumentation Techniques group have patented a new hyperspectral imaging system that they say provides a higher resolution than any other technology. It is made up of a light source that
transforms a normal camera into a hyperspectral camera – capable of inspecting the chemical composition of a sample being analysed by measuring the optical absorptions/molecular resonances of each compound. It relies on an advanced analytical
technique known as dual-comb spectroscopy. Here, light is interfered from two optical sources, called optical frequency combs, to generate a signal called an interferogram. Tis is done at a speed that, until very recently, was too fast to be captured even by very high-speed cameras, according to the UC3M researchers.
VDMA and VDI create a basis for project success
To overcome this challenge, they have
used a dual-comb electro-optical source made with fibre optic components. Te main part is a dual-comb illuminator capable of generating two frequency combs that interfere at much lower frequencies than can be obtained with other systems. Tis makes it possible to detect the signal with any camera that has sensitivity in the emission range of the dual-comb system used. In addition, it is capable of working in different frequency ranges (near-infrared, mid-infrared and terahertz). Prior technologies based on frequency
combs have been able to analyse a single point of a sample, towards which the light source was sent. Te newly patented hyperspectral system is instead able to spectrally analyse an entire sample. Te system can also analyse parameters
such as a sample’s temperature, pressure and concentration. “Te high optical
projects is a common understanding between users and providers of the requirements, framework conditions and the performance to be provided by the image processing system – right from the start of the project. Misunderstandings due to unclear terms and ambiguities increase the implementation effort or even endanger the success of a project. Dr Heiko Frohn, Managing Director of
By Patrick Schwarzkopf, Managing Director, VDMA Robotics + Automation
Industrial image processing can now look back on a success story that has lasted for four decades. It is now indispensable for measuring, testing and positioning tasks in the production cycle in many branches of industry. The aim of the VDI/VDE/VDMA 2632
series of industrial image processing guidelines (found at
www.vdi.de/2632) is to support users and solution providers in the successful implementation of projects. Now a new edition of Sheet 1 has been published. A key factor for the success of vision
Technology at Vitronic and a member of the VDMA Machine Vision board, said: “With the revision of the draft published in 2021, on the one hand the current state of the art was taken into account, on the other hand we have succeeded in making basic terms more specific and selective. This is how the new edition of VDI/VDE/ VDMA 2632 Sheet 1, published in January 2023, prevents costly misunderstandings.” Professor Michael Heizmann of KIT, chairman of the responsible technical committee, added: “With this guideline, we have a new fundamental basic document on which we will build when revising the other guidelines in the series of guidelines. An exciting task, because of the use of AI in
4 IMAGING AND MACHINE VISION EUROPE APRIL/MAY 2023
industrial image processing it is important.” The VDI/VDE/VDMA 2632 series of guidelines provides suppliers and users of image processing systems with important assistance in successful joint project management. VDI/VDE/VDMA 2632 Sheet 2 has proven itself many times over in the creation of specifications. Sheet 3 gives important tips for the acceptance of image processing systems and Sheet 3.1 presents methods for testing the classification performance of corresponding systems. These guidelines are based on the terminology that is defined and explained in a generally understandable manner in Sheet 1, which has recently been revised.
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resolution with which we can characterise the entire sample with our technology is essential when we work, for example, with gases”, said Pedro Martín Mateos, one of the UC3M researchers. “We have already demonstrated its
usefulness for the study of gaseous samples,” he said. “Tis would be useful for the development of more efficient burners or for safety issues. We have also used it for the analysis of certain foods.”
Vitronic
UC3M
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