With a telescope – reflector telescopes an introduction

Telescopes are two types – reflectors and refractors. The fundamental difference between the two is a kind of glass to collect light. Reflectors Refractors use lenses while using the mirror. Going back to school physics, it is obvious that light from distant bodies, like celestial bodies, comes to us as a parallel beam. Given this kind of parallel light rays, reflector telescopes use parabolic mirrors.

Such a parabolic mirror focuses each ray of light that it receives from the original parallel beam at one point. Because this kind of mirror is a reflector telescope is more advantageous compared to a refractor? A particularly important point to note is that reflectors do not chromatic aberrations, suffer a common problem for refractors. This is because, in contrast to refraction, which do not affect the way broken into the various wavelengths changes mirror at all wavelengths.

The main drawback to both refractors and reflectors is that the final image is an inverse image. A simple solution for this error is the placement of a relay or a prism in the passage of light so that an already inverted image of the eye that produces irreversible reached an upright image. This is because the relay or light, as the case may be, acts as an inverter, a light beam results in a final vertical position.

A second advantage is that they are relatively cheaper for the same quality magnification. In addition, because the light reflects only the reflecting surface needs a perfect finish. In the case of refractors, the light must go as part of the lens to another, must be as a result, both surfaces polished perfect fire.

Astronomers generally prefer, reflecting telescopes, but they also have some disadvantages. The most obvious of these is the difficulty for the correct alignment of the mirrors. Reflectors are equipped with an open tube, thus requiring optical elements within a regular maintenance and cleaning. Without this care, the images produced by the telescope top end of unclear and confusing. There are also cases, the secondary light really focus on certain points. The mirrors can also negatively impact the image quality.

The preceding paragraphs describe the use of side view mirror will change reflectors focus light. The door mirrors are smaller than the primary mirror. According to historical data used inclined Sir Isaac Newton, a flat mirror at 45 degrees a second mirror was. The aim was to mirror the light reflected from an eye at the top of the tube. This arrangement is now known as Newton’s design factors and still found.

There is another special design in reflector type telescopes, CASs grain design is known. This gives the light from the object of a specific way to better reflect the primary mirror. With this construction, it is possible, the ocular comfort of your own position. Even modern telescopes such as Hubble Space Telescope makes great use of this design and the benefits discussed above, astronomers do not tend reflector and refractor.

By Taha Mateen


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