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  2. Catadioptric system - Wikipedia

    en.wikipedia.org/wiki/Catadioptric_system

    The first of these was the Hamiltonian telescope patented by W. F. Hamilton in 1814. The Schupmann medial telescope designed by German optician Ludwig Schupmann near the end of the 19th century placed the catadioptric mirror beyond the focus of the refractor primary and added a third correcting/focusing lens to the system.

  3. Catoptrics - Wikipedia

    en.wikipedia.org/wiki/Catoptrics

    Light path of a Newtonian (catoptric) telescope. Catoptrics (from Ancient Greek: κατοπτρικός katoptrikós, "specular", [1] from Ancient Greek: κάτοπτρον katoptron "mirror") [2] deals with the phenomena of reflected light and image-forming optical systems using mirrors. A catoptric system is also called a catopter (catoptre).

  4. Reflecting telescope - Wikipedia

    en.wikipedia.org/wiki/Reflecting_telescope

    A reflecting telescope (also called a reflector) is a telescope that uses a single or a combination of curved mirrors that reflect light and form an image. The reflecting telescope was invented in the 17th century by Isaac Newton as an alternative to the refracting telescope which, at that time, was a design that suffered from severe chromatic ...

  5. List of largest optical reflecting telescopes - Wikipedia

    en.wikipedia.org/wiki/List_of_largest_optical...

    This list of the largest optical reflecting telescopes with objective diameters of 3.0 metres (120 in) or greater is sorted by aperture, which is a measure of the light-gathering power and resolution of a reflecting telescope. The mirrors themselves can be larger than the aperture, and some telescopes may use aperture synthesis through ...

  6. Schmidt–Cassegrain telescope - Wikipedia

    en.wikipedia.org/wiki/Schmidt–Cassegrain_telescope

    People demonstrating a Schmidt–Cassegrain telescope at a sidewalk gathering. The Schmidt–Cassegrain design is very popular with consumer telescope manufacturers because it combines easy-to-manufacture spherical optical surfaces to create an instrument with the long focal length of a refracting telescope with the lower cost per aperture of a reflecting telescope.

  7. The 4-foot-diameter (1.2-meter-diameter) telescope’s primary goal is to observe dark matter and dark energy and to create the largest and most accurate three-dimensional map of the universe. And ...

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