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Latest news of science and technology, new electronics:
Artificial leather for touch emulation
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In a modern technology world where distance is becoming increasingly commonplace, maintaining connection and a sense of closeness is important. Recent developments in artificial skin by German scientists from Saarland University represent a new era in virtual interactions. German researchers from Saarland University have developed ultra-thin films that can transmit the sensation of touch over a distance. This cutting-edge technology provides new opportunities for virtual communication, especially for those who find themselves far from their loved ones. The ultra-thin films developed by the researchers, just 50 micrometers thick, can be integrated into textiles and worn like a second skin. These films act as sensors that recognize tactile signals from mom or dad, and as actuators that transmit these movements to the baby. Parents' touch to the fabric activates sensors that react to pressure and deform the ultra-thin film. This ... >>
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| Random news from the Archive Miniature infrared spectrometer
19.10.2019
Researchers at the Swiss Federal Institute of Technology (ETH) have created a tiny infrared spectrometer that is small enough to fit on a semiconductor chip and yet "provides a lot of interesting possibilities." According to the researchers, chips with such spectrometers can be used in a variety of areas, from the space industry to everyday items. One example of this is the integration into the design of mobile phones.
With the help of an infrared spectrometer in a smartphone and a special application, this device becomes able to determine the alcohol content in a liquid, conduct a simple chemical analysis of a substance, determine the degree of maturity of fruits and vegetables, and perform a number of other functions that will be useful to people of various professions.
The main achievement in all this is the extremely small size of the spectrometer. Conventional infrared spectrometers currently used for analysis are expensive and bulky devices weighing at least a few kilograms and extremely difficult to convert into portable devices.
A conventional spectrometer splits light into two streams, which are reflected from mirrors, added again in a certain way, and the result is measured by a sensitive photosensor. By changing the position of one of the mirrors, it is possible to change the optical image resulting from the addition of two beams of light, which makes it possible to determine the proportion of the content of light with different wavelengths in the incoming optical signal.
The miniature spectrometer uses exactly the same principle. Only instead of movable mirrors, it uses special waveguides, the light refractive index of which can be changed using an external electric field. Changing the refractive index in this case has the same effect, similar to the effect of changing the position of the mirror.
In addition, by changing the refractive indices of two waveguides at once, using a miniature spectrometer, you can work with different parts of the infrared range. Another undoubted advantage of this device is that it needs a one-time calibration, which can be carried out at the manufacturer immediately after the chip is manufactured or the chip is integrated into the final device. In contrast, conventional spectrometers require calibration before each run.
The design of the new miniature infrared spectrometer has no moving parts, making it extremely reliable. But, as the researchers themselves admit, before their offspring can be used in mobile devices, they will need to carry out a number of works aimed at improving technologies and bringing these technologies into line with the requirements of modern industrial production.
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