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  2. Ultra low expansion glass - Wikipedia

    en.wikipedia.org/wiki/Ultra_low_expansion_glass

    Hubble Space Telescope mirror made out of ULE glass. There are many applications for ULE, but by far the most common is for mirrors and lenses for telescopes in both space and terrestrial settings. One of the most well known examples of the use of ULE is in the Hubble Space Telescope's mirror.

  3. Honeycomb mirror - Wikipedia

    en.wikipedia.org/wiki/Honeycomb_mirror

    A honeycomb mirror is a large mirror usually used as the primary mirror in astronomical reflecting telescopes whose face is supported by a ribbed structure that resembles a honeycomb. [2] The design provides sufficient rigidity for ultra-high-precision optics while reducing the weight of the mirror. The reduced weight, in turn, allows smaller ...

  4. First-surface mirror - Wikipedia

    en.wikipedia.org/wiki/First-surface_mirror

    Technicians assemble 6 of the 18 first-surface mirrors used in the James Webb Space Telescope. A first-surface mirror or front-surface mirror (also commonly abbreviated FS mirror or FSM) is a mirror with the reflective surface being above a backing, as opposed to the conventional, second-surface mirror with the reflective surface behind a ...

  5. Zerodur - Wikipedia

    en.wikipedia.org/wiki/Zerodur

    The Keck II Telescope showing the segmented primary mirror made of Zerodur. The main applications for Zerodur include telescope optics in astronomy [2] and space applications, [3] lithography machines for microchips and displays, [4] and inertial measurements systems for navigation.

  6. Segmented mirror - Wikipedia

    en.wikipedia.org/wiki/Segmented_mirror

    Images from telescopes with segmented mirrors also exhibit diffraction spikes due to diffraction from the mirrors' edges. As before, two spikes are perpendicular to each edge orientation, resulting in six spikes (plus two fainter ones due to the spider supporting the secondary mirror) in photographs taken by the James Webb Space Telescope .

  7. So Many of Our Readers' Favorite Walmart Finds Are on Sale ...

    www.aol.com/lifestyle/many-readers-favorite...

    $59.95 at walmart.com. Arched Full Length Mirror. ... bed frame for its simple assembly and ample under-bed space — so it's worth snagging on sale for under ... incredibly comfortable and well-made.

  8. Primary mirror - Wikipedia

    en.wikipedia.org/wiki/Primary_mirror

    The largest optical telescope in the world as of 2009 to use a non-segmented single-mirror as its primary mirror is the 8.2 m (27 ft) Subaru telescope of the National Astronomical Observatory of Japan, located in Mauna Kea Observatory on Hawaii since 1997; [3] [better source needed] however, this is not the largest diameter single mirror in a telescope, the U.S./German/Italian Large Binocular ...

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