Search results
Results from the WOW.Com Content Network
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.
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.
The Houghton telescope or Lurie–Houghton telescope is a design that uses a wide compound positive-negative lens over the entire front aperture to correct spherical aberration of the main mirror. If desired, the two corrector elements can be made with the same type of glass, since the Houghton corrector's chromatic aberration is minimal.
For premium support please call: 800-290-4726 more ways to reach us
very long baseline interferometry array of different radio telescopes: a range of locations on Earth and in space [8] 2002 - Very Large Telescope/PIONIER: 0.001 (1 mas) light (1-2 micrometre) [9] largest optical array of 4 reflecting telescopes: Paranal Observatory, Antofagasta Region, Chile: 2002/2010 - Hubble Space Telescope: 0.04: light ...
8–33 MHz World's largest radio telescope at decametre wavelengths (max. collective area 150,000 m²). Giant Ukrainian Radio Telescope (GURT) Volokhiv Yar, Kharkiv, Ukraine 8–80 MHz Low-frequency radio telescope of new generation. Construction is in progress, separate 25-element subarrays are used for observations of Sun, Jupiter, pulsars.
PLate OPtimizer, or PLOP is a CAD program used by amateur telescope makers to design primary mirror support cells for reflecting telescopes.It was developed by telescope maker David Lewis, first described in 1999, [1] and used to simplify calculations needed in the design of mirror support cells. [2]
Schmidt–Newtonian telescope from Meade. Schmidt–Newtonian telescopes offer images with less coma than Newtonian telescopes of the same focal ratio (usually about half). ). The corrector plate also helps to seal the tube assembly from air currents, and provides mounting point for the diagonal mirror, eliminating the diffraction effects from a "spider" secondary supp