Almost all of the major telesc. A reflecting telescope is a telescope that uses a single or a combination of curved mirrors that reflect light and form an image.
Optical Reflectors
In astronomy it is used to examine the visible region of the electromagnetic spectrum as well as the shorter ultraviolet and longer infrared wavelength regions adjacent to it.
What are reflecting telescopes used for. Reflecting telescopes reflectors are used not only to examine the visible region of the electromagnetic spectrum but also to explore both the shorter and longer wavelength regions adjacent to it i e the ultraviolet and the infrared. In the coudé arrangement the beam is reflected by a third plane mirror down the polar axis about which the telescope rotates so that it can be made to feed a fixed spectrograph. Reflecting telescope also called a reflector is a telescope that uses a combination of curved mirrors that reflect light and form an image of a distant object.
The reflecting telescope was invented in the 17th century by isaac newton as an alternative to the refracting telescope which at that time was a design that suffered from severe chromatic aberration. Although reflecting telescopes produce other types of optical aberrations it is a design that allows for very large diameter objectives. In the largest reflecting telescopes very great focal lengths greater than that of the largest refractor may be obtained by the use of a secondary mirror.