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  2. Hartmann mask - Wikipedia

    en.wikipedia.org/wiki/Hartmann_mask

    Hartmann screen used for the 200-inch (5.1 m) Hale Telescope Using a Hartmann mask to adjust focus Hartmann mask is a tool to help focusing telescopes , mainly used by amateur astronomers. It is named after the German astronomer Johannes Franz Hartmann (1865–1936), who developed it around 1900.

  3. Optical telescope - Wikipedia

    en.wikipedia.org/wiki/Optical_telescope

    The Large Binocular Telescope at the Mount Graham International Observatory in Arizona uses two curved mirrors to gather light. An optical telescope is a telescope that gathers and focuses light mainly from the visible part of the electromagnetic spectrum, to create a magnified image for direct visual inspection, to make a photograph, or to collect data through electronic image sensors.

  4. Carbon dioxide cleaning - Wikipedia

    en.wikipedia.org/wiki/Carbon_dioxide_cleaning

    CO 2 cleaning has found application in many industries and technical areas, including aerospace, automotive, electronics, medical, manufacturing, basic and applied research, and optics. [ 5 ] [ 6 ] The different carbon dioxide cleaning methods can remove gross contamination, paint , overlayers , grease , fingerprints , particles down to ...

  5. Astroscan - Wikipedia

    en.wikipedia.org/wiki/Astroscan

    The telescope's secondary mirror was mounted on a flat optical window at the front of the tube. ... Cleaning the Optics of the Edmund Astro-Scan Telescope;

  6. Schmidt camera - Wikipedia

    en.wikipedia.org/wiki/Schmidt_camera

    A Schmidt corrector plate is an aspheric lens which corrects the spherical aberration introduced by the spherical primary mirror of the Schmidt or Schmidt–Cassegrain telescope designs. It was invented by Bernhard Schmidt in 1931, [ 6 ] although it may have been independently invented by Finnish astronomer Yrjö Väisälä in 1924 (sometimes ...

  7. Optical instrument - Wikipedia

    en.wikipedia.org/wiki/Optical_instrument

    The first optical instruments were telescopes used for magnification of distant images, and microscopes used for magnifying very tiny images. Since the days of Galileo and Van Leeuwenhoek, these instruments have been greatly improved and extended into other portions of the electromagnetic spectrum.

  8. Corrective Optics Space Telescope Axial Replacement

    en.wikipedia.org/wiki/Corrective_Optics_Space...

    The Corrective Optics Space Telescope Axial Replacement (COSTAR) is an optical correction instrument designed and built by NASA. It was created to correct the spherical aberration of the Hubble Space Telescope ' s primary mirror , which incorrectly focused light upon the Faint Object Camera (FOC), Faint Object Spectrograph (FOS), and Goddard ...

  9. Astronomical filter - Wikipedia

    en.wikipedia.org/wiki/Astronomical_filter

    Ultraviolet filters for protecting a camera from ultraviolet radiation. An astronomical filter is a telescope accessory consisting of an optical filter used by amateur astronomers to simply improve the details and contrast of celestial objects, either for viewing or for photography.

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