What is the diagonal of the telescope?
The diagonal telescope is a mirror or prism that allows easier viewing thanks to carefully angular reflector. Material size, material quality and telescope diagonal angle can help improve the reflected image that the user sees by the eyepiece. The diagonal telescope dates back to the earliest days of the telescope invention and is expected that Isaac Newton was first used in the mid -17th century. Without diagonal, the only undisturbed observation position would be directly behind the main lenses of the optical telescope. Looking at views, such as stars, the user would basically have to be under the binoculars or even lie below it. To facilitate tracking, the image from the main lens or mirror is reflected in the diagonal of the eyepiece, which is often placed on the upper part of the telescope and turned off to one side.
Newtonian Telerozsah is often quoted as the first to use the diagonal of the telescope. This reflecting model uses a concave lens as a primary mirror and a flat diagonal mirror to reflect lightat an angle of 90 degrees, allowing the user to look down to the range instead of getting behind it. The Newtonian telescopes, first used to view the months of Jupiter and count the rings on Saturn, are still used in modern astronomy.
Today, the diagonal of the telescope is often an essential part of the optical range and has been standardized to several basic sizes. Standardization allows the optimum relationship between the diagonal mirror and the eyepiece to create a clear and easily visible reflected image. In amateur uses, three diagonal sizes are common: 965, 1.25 and 2 inches (2.45, 3,175 and 5.08 cm, respectively).
In addition to differentiation in the size of the mirror, the angle of the Telerozsah diagonal can change between models. Two -edges designed for stars or astronomical observations usually have a diagonal angle of 90 degrees. In other telescopes intended for birds watching, Wel WatchYB or other earthly monitoring is a common diagonal of 45 degrees. The degree of reflection affects the location of the eyepiece.
Because the diagonal reflects the initial light that takes place with the front lens, some light will almost always be lost during the process. The material used in the production of the lens can help increase image quality, even if it cannot replicate it precisely. Special lens coatings increase the amount of light that is reflected; According to some experts, properly coated diagonals can reflect about 90% of the light received.