According to the Science and Technology Daily, large-diameter high-precision aspheric optical mirrors are the core components of high-resolution space-to-earth observation, deep-space exploration and astronomical observing systems. Their manufacturing technology level is for national defense security, national economic construction, and basic scientific research capabilities. Words are important. As a highly stable optical mirror material, silicon carbide materials have lighter weight, higher specific stiffness and thermal stability. However, limited by the relevant technical conditions, the maximum diameter of the single-unit silicon carbide mirrors publicly reported in the world for a long time is only 1.5 meters. Zhang Xuejun, deputy director of the Changchun Institute of Optics and Mechanics, Chinese Academy of Sciences, led the team to take a different approach, experienced hundreds of experimental explorations and process validations, broke through a number of key techniques for mirror blank preparation, and established a large-diameter silicon carbide mirror blank manufacturing platform, which was successfully developed for visible light. Imaging of 2 m, 2.4 m, 3 m caliber single silicon carbide mirror blanks and 4 m diameter monolithic silicon carbide mirror blanks. The development of a mirror blank is only the first step. As the core component of large-caliber optoelectronic equipment, it has extremely high requirements on the surface accuracy and surface quality of the mirror surface. "Equivalent to flattening the size of a piece of land in Beijing, the height difference between the southeast corner and the northwest corner is within plus or minus a few millimeters. Under such an accuracy requirement, the structure must be guaranteed to be stable." Zhang Xuejun introduced, in carbonization At the same time as breakthroughs in the preparation of silicon materials, they also overcome two other technical bottlenecks - large-diameter silicon carbide aspheric processing and high-performance modification and coating. At the meeting, the "4m-order high-precision SiC aspheric mirror integrated manufacturing system" project undertaken by the Changchun Institute of Optics and Fine Mechanics of the Chinese Academy of Sciences passed the acceptance test. The acceptance expert group believes that the project has developed a large-caliber series of mirrors, which is a major technological breakthrough in the field of large-caliber optical manufacturing in China. Glass Railing Standoff,Glass Standoffs,Standoff Railing,Glass Holding Bracket DONGYING SHENGYU METAL PRODUCT CO.,LTD , https://www.shengyuaccessories.com