Stellary Starry Universe

There are generally two types of optical Telescopes. The refracting telescope and the reflecting telescope. In addition there is a type of telescope that combines both or these types of telescopes called a catadioptric telescope which uses mirrors combined with lenses.

Telescope Characteristics

• Refracting telescopes which uses lenses to form an image.
• Reflecting telescopes which uses one or more mirrors to form an image.
• Catadioptric telescopes which uses mirrors combined with lenses. The lenses can be either in front of the mirror or somewhere within the optical path to form an image.

Atmospheric electromagnetic transmittance or opacity

Optical telescopes gather and focus light mainly from the visible part of the electromagnetic spectrum. The telescopes magnify the apparent size of distant objects as well as their apparent brightness. To observe or photograph the image it is usually sent to a computer nowadays.

Optical telescopes work by employing one or more curved optical elements carefully manufactured from special glasses and precision ground, sometimes coated, then spaced appropriately according to precise formulas. The lenses or mirrors gather light and other electromagnetic radiation. They focus that light or radiation to a focal point where the image is captured.

Optical telescopes are used for astronomy and in many non-astronomical instruments. Some of the applications are spotting scopes, monoculars, binoculars, camera lenses, spyglasses and scientific instruments depending on images.