It is known that famous bottles of whiskey sell for more than 100 million rubles. But if you're happy
New research led by scientists fromThe schools of physics and astronomy led to the development of a method using lasers that can see through a bottle to analyze the contents. The challenge was to record the content signal without recording the glass signals.
The team used the laserspectroscopy, a process in which laser light is directed at a substance of interest and a sample scatters the light into different colors. The exact colors of scattered light depend on the chemical composition of the substance and can therefore be used to identify a variety of materials, from bacteria, food and drink, to paint on sculptures and explosive powders.
Postdoctoral Fellowship, Holly Fleming, MingzhouChen and Graham Bruce, led by Professor Kishan Dholakia, developed a new method for accurately measuring the contents of a bottle. Instead of illuminating the bottle with a standard laser beam, the team used a glass element. So they created a ring of laser light on the surface of the bottle and a tightly focused spot inside the liquid contents. Since the signal from the bottle and the signal from the liquid are in different positions, the detector can be placed to register only the signal from the liquid, which means that the contents of the bottle can be evaluated without even opening the bottle.
This approach does not require complex opticalinstallations and therefore promises to be easily manufactured for widespread use. If whiskey isn't to your liking, the researchers also demonstrated a method using vodka and gin. This means that in the future it will be possible to authenticate expensive alcohol without losing a drop.
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