1. Panda PANDA telescope (one of the earliest telescope brands in my country. Started in 1936).

The Panda Telescope is developed and produced by Yunnan North Optical Electronics Group Co., Ltd. (formerly Yunnan Optical Instrument Factory). It is the earliest and largest comprehensive enterprise in China that integrates scientific research, development, manufacturing and domestic and foreign trade sales. Precision optical instrument factory.

2. Xiguang Telescope (Xiguang Group was founded in 1953 as a high-tech national defense optoelectronic enterprise).

3. Phenix telescope (China’s well-known trademark, Chinese famous brand).

The function of a telescope:

The first function of a telescope is to enlarge the angle of distant objects so that the human eye can see details with smaller angular distances. The second function of the telescope is to send the light beam collected by the objective lens that is much thicker than the pupil diameter (maximum 8 mm) into the human eye, allowing the observer to see faint objects that were previously invisible.

In 1608, Hans Liebersch, a Dutch optician, accidentally discovered that he could see distant objects clearly with two lenses. Inspired by this, he built the first telescope in human history. . In 1609, Galileo Galilei, a native of Florence, Italy, invented the 40-power double-mirror telescope, which was the first practical telescope put into scientific application.

After more than 400 years of development, telescopes have become more and more powerful, and their observation distances have become farther and farther.