The telescope is a visual optical instrument used to observe distant objects, which can magnify the small opening angle of distant objects according to a certain magnification, so that it has a large opening angle in the image space, so that the objects that could not be seen or distinguished with the naked eye become clear and distinguishable. Therefore, telescopes are indispensable tools in astronomy and ground-based observation. It is an optical system that uses an objective lens and eyepieces to keep the incident parallel beam still emitted in parallel. According to the principle of telescopes, it is generally divided into three types. An instrument that collects electromagnetic waves to observe the electromagnetic radiation of distant objects, called a radio telescope, in daily life, telescopes mainly refer to optical telescopes, but in modern astronomy, astronomical telescopes include radio telescopes, infrared telescopes, X-ray and gamma ray telescopes. The concept of astronomical telescopes extends further to gravitational waves, cosmic rays, and dark matter.
Optik teleskoplar in günlük yaşam vardır ayrıca bilinen as "clairvoyant aynalar". O esas olarak amatör astronomik teleskoplar, tiyatro teleskoplar ve askeri dürbünler.
Yaygın kullanılan dürbün ayrıca ihtiyaç eklemek a prizma sistem için amaç of azaltmak cilt ve çevirme tersi görüntü, ve prizma sistem olabilir bölünmüş içine çatı prizma sistem (bu is, the Smit-Beehan Roof Ridge Prizma Sistem) ve the Paul Prizma Sistem (Porro Prizma) (ayrıca bilinen as the Pro-Prizma Sistem) uygun the shape of the formula, and the principles and applications of the two systems are are benzer.
Küçük elde taşınır teleskoplar için kişisel kullanım olmamalı kullanmalı çok büyük büyütme, genel 3~12 kez uygun 2c ne zaman büyütme çok büyük, görüntüleme netlik olacak olacak fakir, ve titreme ciddi, daha fazla 12 kez teleskop genel kullanım tripodlar ve diğer yollar düzeltmek.