The first lightweight holographic lens appeared. She will improve telescopes

Researchers have begun work on a project for a giant space telescope with holographic lenses.

They can convert visible and infraredstarlight either into a focused image or into a spectrum. The experimental method, detailed in an article published in the journal Nature Scientific Reports, can be used to create a lightweight flexible lens several meters in diameter. It can be collapsed during launch and deployed in space.

“We use two spherical waves of light forcreating a hologram, which gives us control over the diffraction grating recorded on the film and its effect on light, ”said Mei-Li Hsieh, a researcher at the Rensselaer Polytechnic Institute. "We believe this model could be useful in applications requiring extremely high resolution spectroscopy, such as exoplanet analysis."

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Telescopes to be launched into spaceyet too heavy due to the large number of mirrors for focusing light - they can reach several meters in diameter. In contrast, a lightweight flexible holographic lens is much lighter and more flexible. Such an instrument can be used to directly observe exoplanets, which is a breakthrough compared to existing methods of detecting exoplanets based on the light emanating from the star around which they revolve.

“To find Earth 2.0, we want to see exoplanets using direct visualization and should be able to look at the star and see the planet separately from the star. And for this we need high resolution and a very large telescope, ”the researchers noted.

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