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When observing biological samples under a microscope, if the medium in which the objective lens is located is different from the sample, the light beam will be interfered with. For example, when observing a water sample with a lens surrounded by air, the light bends more strongly in the air around the lens than in water.This interference can cause the measured sample depth to be smaller than the a...
The development of additive manufacturing (AM) has profoundly changed the manufacturing industry, and this technology has been applied in fields such as food, medicine, automotive, and electronic components. Especially in the aerospace field, where extremely lightweight and high-strength (~500mpa) components are required, aluminum alloy additive manufacturing is considered a very promising solutio...
An interdisciplinary research group, including the German synchrotron radiation accelerator DESY and the Helmholtz Institute in Jena, Germany, reported that invisible gratings made of air not only are not damaged by lasers, but also maintain the original quality of the beam.The relevant research has been published in Nature Photonics under the title of "Acousto opt modulation of gigawatt scale las...
According to reports, a research team at the University of Chicago in the United States recently demonstrated a new method for obtaining mid infrared emission using colloidal quantum dots (QDs), which may open up new applications for mid infrared light sources.Colloidal quantum dots are a type of semiconductor nanocrystal material that provides a promising approach for the synthesis of light sourc...
The gravitational wave background was first detected in 2016. This was announced after the release of the first dataset by the European pulsar timing array. The second set of data has just been released, combined with the timed array of Indian pulsars, and both studies have confirmed the existence of the background. The latest theory seems to suggest that we are seeing a comprehensive signal of th...