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Olomouc scientist has come up with an innovation in optical measurements using laser Added:27.8. 2013
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Olomouc scientist has come up with an innovation in optical measurements using laser

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The new result in optical metrology – a method to increase the resolution of optical measurements – presented in the prestigious scientific journal Physical Review Letters scientist from the Department of Optics, Faculty of Science UP Miroslav Jezek. Research conducted together with colleagues from the Technical University of Denmark in Lyngby. The result is a new standard for the evaluation of super-resolution and opens the way to new methods of metrological.

The distinction is an important parameter measurements in all fields of science and technology. In many applications, and basic research is a measurement value is transferred to record number of oscillations of light. An example may be an optical length measurement – the laser beam is divided, one part flowing through the measured portion and the second reference path; after the re-composition, interference of light in the form of repeated alternation of larger and smaller light intensity. The change causes displacement measured length of a number of maxima which can be expressed in units of length.

  • "The natural question is how little change tracks can be recorded this way. Usually, the basic differentiation is the transition from maximum to minimum or vice versa, that is half the wavelength of the light used. For visible radiation is of the order of hundreds of nanometers, ie ten-thousandth of a millimeter. Some applications of this limitation won using signals with a shorter wavelength, such as X-rays or accelerated electrons, "* said dr. Miroslav Hedgehog.

Other solutions offered quantum optics: the use of entangled states of elementary particles of light – photons – can achieve more bars in one period, and therefore multiple resolution improvement. Quantum coherent states but they are very sensitive and extremely easy to lose its advantages.

** ** A surprising result Dr. Jezek cooperation with a team from Technical University of Denmark brought a surprising result: * "Multiple resolution enhancement does not require a quantum coherent states, but it can be achieved only with the use of laser radiation and virtually no impact on the measurement uncertainty. The result is a new standard for the evaluation of super-resolution and opens the way to new methods of metrological, "* said the Hedgehog.

The paper in the prestigious scientific journal is to achieve higher resolution, so-called. Super-resolution optical phase measurement interferometer. The reason? The phase measurement in the optical interferometer can be converted to a variety of other measurements, e.g. measuring length, vibration, strength and optical properties of materials such as density, refractive index, the concentration of the substance, etc.

Advantages of „our“ methods: Higher resolution can be achieved using the „classical“ light, eg. Laser light (laser pointer) without using entangled, and therefore „non-classical“ states of light. While these allow you to achieve super-resolution as well, but only under ideal conditions (zero losses and noise).

At the birth of long-term cooperation of Olomouc and Copenhagen physicists stood doc. Radim Filip Department of Optics of Palacky University. * „With the team of Professor Ulrika L. Andersen already led to many interesting experimental test our theories. But now work directly with experimental teams from Olomouc and Lyngby with complementary technologies, which is a step towards a new experimental level,“ said Filip *.

While fostering cooperation stands International Centre for information and uncertainty (MCIN) coordinated doc. Jaromir Fiuráškem. The center brings together the Department of Optics and Department of Computer Science Faculty of Science. It also provides practical training researchers abroad.

  • The report was prepared Miroslav Jezek, Faculty of Science, and Lenka Skácelíková, Communications Department UP *

*** More information: ***

  • Mgr. Miroslav Jezek, Ph.D.

researcher at the Department of Optics Science UP E-mail: miroslav.jezek@upol.cz Tel .: 585 634 248 *




Author: tiskove, zpravy

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