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The Cassegrain reflector is a folded optics design, using two mirrors to fold the light path back on itself. This increases the focal length of the telescope, without increasing it's length. By doing so you can compact a more powerful telescope into a smaller frame, which has advantages for small amateur scopes (portability) and large professional ones (reduced cost).
First developed in 1672 by Laurent Cassegrain, this reflector is a combination of a primary concave mirror and a secondary convex mirror, both aligned symmetrically about the optical axis. The primary mirror usually contains a hole in the centre thus permitting the light to reach an eyepiece, a camera, or a light detector. The primary mirror is parabolic while the secondary mirror is hyperbolic.
Of the three basic types of telescopes: refractors, reflectors and catadioptrics, the Cassegrain reflector falls under the categories of reflecting and Catadioptric designs.
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Are the Casseragrain and the relfecting telescopes the same type of telescope?
The Cassegrain has a hole in the mirror, at the bottom of the scope, where the reflector mirror reflects the light onto the viewing piece. So, the Cassegrain is a reflection telescope but it's primary and secondary mirrors work a bit differently than most reflecting telescopes.
What type of telescope concave mirrors to gather light and view the image?
Reflecting telescope. Most useful reflectors are compound types, combining a system of mirrors and lenses, such as the Newtonian and Cassegrain.
What telescope design has a hole in the center of the main mirror?
That's the "Cassegrain". The prime focus and eyepiece are out the back, even though it's a reflector.
What are examples of optical telescopes?
The Hubble Space Telescope (HST) is an example of an optical telescope, as are the Keck Observatory on Mauna Kea, Hawaii. the Hale Telescope at the Palomar Observatory in California and the Hooker 100 inch Telescope at the Mt Wilson Observatory, also California.
Which is bigger a reflecting or refracting telescope?
There is no single answer to this question. The Cassegrain has a paraboloidal shaped main mirror. The Ritchey-Chrétian has a hyperboloidal main mirror. I have a Schmidt-Cassegrain which has a spherical main mirror. Dall-Kirkham telescopes have an ellipsoidal main mirror. The secondary mirror can have different shapes as well but I won;t get into hose. That's a separate issue.
What type of telescope is the Webb telescope?
A Cassegrain reflector
What category is the Hubble Space Telescope?
The HST is a Cassegrain reflector telescope.
What is a design of astronomical reflecting telescope?
Cassegrain
What type is the the hubble space telescope?
HST's primary mirror is a Cassegrain Reflector.
What kind of telescope is the hubble telescope?
HST is a Cassegrain reflecting telescope using the Ritchey–Chrétien design, with an aperture of 7.9' (2.4m). It has observational ability in the Ultraviolet, Infrared, and Visible light spectrums.
Are the Casseragrain and the relfecting telescopes the same type of telescope?
The Cassegrain has a hole in the mirror, at the bottom of the scope, where the reflector mirror reflects the light onto the viewing piece. So, the Cassegrain is a reflection telescope but it's primary and secondary mirrors work a bit differently than most reflecting telescopes.
What is the Hubble space telescope's magnification?
It does not have a magnification properly speaking since it works as a camera, not a visual telescope. The aperture of the Cassegrain-Schmidt mirror is 2.4 m. The main camera has 16 MB.
What type of telescope concave mirrors to gather light and view the image?
Reflecting telescope. Most useful reflectors are compound types, combining a system of mirrors and lenses, such as the Newtonian and Cassegrain.
What telescope design has a hole in the center of the main mirror?
That's the "Cassegrain". The prime focus and eyepiece are out the back, even though it's a reflector.
What is a telescope that uses a mirror to collect light emitted by distant or faint objects?
This type of telescope is often referred to as a Schmidt-Cassegrain telescope, and can be short and wide. They have an eyepiece that extends at a right angle from the body, and have a disk in the middle of the lens, behind which is the mirror.
Type of telescope?
Different telescopes utilize different parts of the electromagnetic spectrum. Two types of optical telescope are refracting and reflecting. There are also different kinds of radio telescope investigating different bandwidths from the infra red to the untra violet
Is hubble space telescope a convex?
No - HSTs' primary mirror is a Cassegrain Reflector of Ritchey-Chrétien design, which contains a hyperbolic primary/secondary mirror.
