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Scientists from Tomsk Polytechnic University together with colleagues proposed using special diffraction gratings with gold plates instead of microlenses used in the classic configuration to obtain images in nanoscopes. Microlenses transmit images by small pieces (pixels), whereas diffraction gratings allow you to see the whole object. Such innovation can help to accelerate the generation of images from nanoscopes without losing any magnification power. The results of the study are presented in the journal Annalen der Physik.
Optical microscopes are considered the simplest. However, for a long time it was believed that they are not powerful enough compared to, for example, electronic microscopes. Everything changed with the advent of nanoscopes in 2011. Images are obtained using small spheres or rectangular particles of quartz glass and enlarged further with a conventional microscope lens. Through nanoscopes it is possible to see objects at 50 nm, which exceeds the capabilities of a conventional optical microscope by 20 times. They can also be used to study living viruses, as compared to electronic microscopes lacking this function because the flow of electrons just kills them, and the inside of cells. This feature makes nanoscopes extremely promising for biological research. Therefore, scientists around the world are working to improve their resolution and design.
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