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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. 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.

  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. 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 ...

  6. Honeycomb mirror - Wikipedia

    en.wikipedia.org/wiki/Honeycomb_mirror

    The un-coated backup primary mirror for the Hubble Space Telescope showing its honeycomb structure. [1]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]

  7. Segmented mirror - Wikipedia

    en.wikipedia.org/wiki/Segmented_mirror

    Such non-segmented, or monolithic mirrors can not be constructed larger than about eight meters in diameter. The largest monolithic mirrors in use are currently the two primary mirrors of the Large Binocular Telescope, each with a diameter of 8.4 meters. The use of segmented mirrors is therefore a key component for large-aperture telescopes.

  8. This $35 mirror is 'like trying on clothes in a super fancy ...

    www.aol.com/lifestyle/gold-arch-mirror-walmart...

    This stunning floor-length mirror can be used in several ways: as a standing floor mirror, leaning against a wall or mounted onto the wall — the design options are endless. $35 at Walmart

  9. Astroscan - Wikipedia

    en.wikipedia.org/wiki/Astroscan

    The Astroscan had a Newtonian reflector layout with a 4⅛" clear-inch (105mm) diameter f/4.2 aluminized and overcoated borosilicate glass parabolic primary mirror with a focal length of 17½ inches (445mm). [1] The telescope's secondary mirror was mounted on a flat optical window at the front of

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