The first function of the telescope is to enlarge the opening angle of distant objects, so that the human eye can see the details with smaller angular distance. The second function of the telescope is to send the light beam collected by the objective lens, which is much thicker than the pupil diameter (up to 8 mm), to the human eye, so that the observer can see dim objects that he could not see before. 1608, Hans Justus Hans Liebig, a Dutch optician, accidentally discovered that two lenses could be used to see the distant scenery. Inspired by this, he made the first telescope in human history. 1609 Italian Florentine Galileo Galili Lei Faming made a 40x telescope, which is the first practical telescope put into scientific application.
After more than 400 years of development, the function of the telescope is becoming more and more powerful, and the observation distance is getting farther and farther.
Chinese name
telescope
Foreign name
telescope
principle
Lens or mirror
Another name
Li Qian Mirror.
inventor
Dutch Hans Lieber
quick
navigate by water/air
fundamental principle
Hubble space
classify
General parameters
English abbreviation
Purchase and maintenance
relevant information
Development history
1608, Hans Lippershey, an optician in middelburg, the Netherlands, built the world's first telescope. Once, two children played some scenes in front of Lipper's shop. They looked at the weather vane on the distant church through the front and rear lenses and were in high spirits. Liporsay picked up two lenses and saw that the weather vane in the distance was greatly enlarged. Lippert ran back to the store and put the two lenses on a spool. After many experiments, Hans Lippert invented the telescope. 1608, he applied for a patent for his telescope, and made a binoculars according to the requirements of the authorities. It is said that dozens of telescope opticians in the town all claimed to have invented the telescope.
Hans lipscher
At the same time, the German astronomer Kepler began to study telescopes. He proposed another kind of astronomical telescope in Bending Optics, which consists of two convex lenses. Unlike Galileo's telescope, it has a wider field of vision than galileo telescope. But Kepler didn't make the telescope he introduced. Sagana first made this telescope between1613-1617. He also made a telescope with a third convex lens according to Kepler's suggestion, and turned the inverted image of the telescope composed of two convex lenses into a positive image. Sagana made eight telescopes, one for observing the sun, and no matter which one can see sunspots with the same shape. Therefore, he dispelled many people's illusion that sunspots may be caused by dust on the lens, and proved that sunspots are really observed. When observing the sun, Sagina installed special shading glass, but Galileo did not add this protective device. As a result, he hurt his eyes and finally became almost blind. Huygens of the Netherlands made a telescope with a tube length of nearly 6 meters to explore Saturn's rings in 1665, and later made a telescope with a tube length of nearly 4 1 meter.
1793, William Herschel of England made a reflective telescope. The reflector has a diameter of 1 30cm, is made of copper-tin alloy and weighs1ton.
William Herschel
Reflecting telescope made in william parsons, England in 1845, the diameter of the reflector is1.82m. ..
19 17, the Hook telescope was built at Mount Wilson Observatory in California, USA. Its primary mirror aperture is 100 inch. It was with this telescope that Edwin Hubble discovered the amazing fact that the universe is expanding.
1930, German Bernhard Schmidt integrated the advantages of refractive telescope and reflecting telescope (refractive telescope has small aberration but chromatic aberration, the larger the size, the more expensive it is; Reflective telescope has no chromatic aberration, and its cost is low. The reflector can be made large, but there is chromatic aberration), and the first folding reflective telescope is made.
Hooke telescope
After the war, reflective telescopes developed rapidly in astronomical observation. 1950, Haier reflective telescope with a diameter of 5.08m was installed on the Paloma Mountain.