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2. Equatorial platform - Wikipedia

   en.wikipedia.org/wiki/Equatorial_platform

   A large portable Newtonian telescope on an altazimuth mount with a third equatorial axis platform mount consisting of a pivot and radius bearing surfaces.. An equatorial platform or equatorial table is an equatorial telescope mount in the form of a specially designed platform that allows any device sitting on it to track astronomical objects in the sky on an equatorial axis. [1]

3. Strain wave gearing - Wikipedia

   en.wikipedia.org/wiki/Strain_Wave_Gearing

   Harmonic Drive SE strain wave gear set consisting of wave generator bearing (top left), flexspline cup (top right) and circular spline ring (bottom). Strain wave gearing (also known as harmonic gearing ) is a type of mechanical gear system that uses a flexible spline with external teeth, which is deformed by a rotating elliptical plug to engage ...

4. List of telescope parts and construction - Wikipedia

   en.wikipedia.org/wiki/List_of_telescope_parts...

   Primary lens: The objective of a refracting telescope. Primary mirror: The objective of a reflecting telescope. Corrector plate: A full aperture negative lens placed before a primary mirror designed to correct the optical aberrations of the mirror. Schmidt corrector plate: An aspheric-shaped corrector plate used in the Schmidt telescope.

5. Telescope mount - Wikipedia

   en.wikipedia.org/wiki/Telescope_mount

   Slewing or mechanically driving the mount's polar axis in a counter direction to the Earth's rotation allows the telescope to accurately follow the motion of the night sky. Equatorial mounts come in different shapes, include German equatorial mounts (GEM in short), equatorial fork mounts , mixed variations on yoke or cross-axis mounts, and ...

6. GoTo (telescopes) - Wikipedia

   en.wikipedia.org/wiki/GoTo_(telescopes)

   After alignment the telescope mount will then know its orientation with respect to the night sky, and can point to any right-ascension and declination coordinates. When the user selects an object to view, the mount's software looks up the object's right ascension and declination and slews (moves) to those coordinates. To track the object so ...

7. List of the United States Army fire control and sighting ...

   en.wikipedia.org/wiki/List_of_the_United_States...

   This is a list of United States Army fire control, and sighting material by supply catalog designation, or Standard Nomenclature List (SNL) group "F".The United States Army Ordnance Corps Supply Catalog used an alpha-numeric nomenclature system from about the mid-1920s to about 1958.