The 24 pieces of costly hexagonal reflection mirrors are the core components of the most powerful spectrum survey telescope, and each of them has a 1.1 meter diagonal conjugate and 25 mm thickness. It adopts the mirror face automatically splitting joint and transforming technology which is created by Chinese and unique in the world.

The goal of the automatically splitting joint and transforming of the gigantic reflection mirror with a total area of 20 square meters is to point at celestial bodies at different height or location accurately, coordinating with the gigantic cement tube of 50 meters long and the 30 square meters primary mirror made by the same way at the other end. The super telescope which is built on a hill 170 kilometers from northeast of Beijing city is about to start a “census” for the boundless universe.

The Large Sky Area Multi-Object Fiber Spectroscopic Telescope (LAMOST) of Chinese Academy of Science nation Astronomical Observatory Xinglong Observing station which costs 2.35 RMB is as high as 15 floors, and the optical system is made up of 3.6 meter caliber Schmidt corrector plate and 4.9 caliber spherical surface primary mirror and focal surface. The imaging focal surface is equipped with 4000 optical fibers which can do automatically positioning and is connected with 16 spectrometers to do real time recording. The telescope observes for 1.5hour every night time, and can get 4000 astronomical spectrums maximally.

The Chief Engineer Cui Xiangqun said: "in 3 - 5 years, scientists will get the spectrum data of 2.5 million stars, 2.5 million galaxies, 1.5 million Ultra Luminous ir Galaxies and 1 million quasars."

The international active optical technology authority Ray Wilson commented: "China’s new equipment is the most advanced and ambitious application of the active optical technology."

It is expected that at least 10 million celestial body spectroscopic data will be acquired after 6 years` formal running of the telescope. All the data will be shared within the international scientific community.

The American famous astronomer Richard Ellis said: "a large caliber astronomical telescope is the best case of human civilization. Until saw the new guy, did we know what the Chinese have accomplished."

The Chinese plan to set up a new super telescope at the Antarctic, where the observation is wider, and the condition is better.

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