enow.com Web Search

Search results

1. Results from the WOW.Com Content Network

2. Wayfair Presidents’ Day deals are here: Save up to 70% on ...

   www.aol.com/lifestyle/wayfair-presidents-day...

   This oval-shaped mirror would work well in a bathroom, living space, or even over a vanity. ... It has a sturdy metal frame and manufactured wood tabletop, and there’s a secondary lower shelf ...

3. Secondary mirror - Wikipedia

   en.wikipedia.org/wiki/Secondary_mirror

   A secondary mirror (or secondary) is the second deflecting or focusing mirror element in a reflecting telescope. Light gathered by the primary mirror is directed towards a focal point typically past the location of the secondary. [1] [2] Secondary mirrors in the form of an optically flat diagonal mirror are used to re-direct the light path in ...

4. List of telescope parts and construction - Wikipedia

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

   Objective: The first lens or curved mirror that collects and focuses the incoming light. 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.

5. Three-mirror anastigmat - Wikipedia

   en.wikipedia.org/wiki/Three-mirror_anastigmat

   A Paul design has a parabolic primary with spherical secondary and tertiary mirrors; a Paul–Baker design modifies the secondary slightly to flatten the focal plane. A three-mirror anastigmat is an anastigmat telescope built with three curved mirrors, enabling it to minimize all three main optical aberrations – spherical aberration , coma ...

6. Chopping (astronomy) - Wikipedia

   en.wikipedia.org/wiki/Chopping_(astronomy)

   This telescope utilized its Second Mirror Assembly (SMA) primarily for chopping and also partially for small corrections. The signals that the SOFIA Telescope would be searching for could be tens of thousands of times less significant than the background emission , so the telescope has an average chopping frequency of 2-5 Hz , but can reach ...

7. Gregorian telescope - Wikipedia

   en.wikipedia.org/wiki/Gregorian_telescope

   The Gregorian telescope consists of two concave mirrors: the primary mirror (a concave paraboloid) collects the light and brings it to a focus before the secondary mirror (a concave ellipsoid), where it is reflected back through a hole in the centre of the primary, and thence out the bottom end of the instrument, where it can be viewed with the aid of the eyepiece.