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NUDT achieves China's sub-nanometer accuracy

By Wang Wowen and Wang Xiaogong (China Military Online)

08:50, January 17, 2013

The magneto-rheology ultra-precision polishing equipment and the ion beam ultra-precision polishing equipment independently developed by the Precision Engineering Innovation Team under the National University of Defense Technology (NUDT) of the Chinese People's Liberation Army (PLA) achieved the sub-nanometer accuracy in the field of optical element processing and passed the check and the acceptance by national authoritative department in mid-January 2013.

According to experts, the achievement has made China the third country worldwide to master the high-precision optical element manufacturing and processing technology following the United States and Germany, and also the one and the only country in the world to have the capability to develop magneto-rheology polishing equipment and ion beam polishing equipment at the same time.

Nanometer accuracy is hailed as a "crown jewel" of ultra-precision processing technology. In the past 20-odd years, under the leadership of Professor Li Shengyi, the Precision Engineering Innovation Team under the NUDT of the PLA has broken through technical bottlenecks and developed independently magneto-rheology ultra-precision polishing equipment and ion beam ultra-precision polishing equipment, achieving China's sub-nanometer accuracy in the field of optical element processing.

In the past three years, in cooperation with such organizations as the Chinese Academy of Sciences (CAS) and the China Aerospace Science and Technology Corporation (CASTC), the team has promoted the development of China's space optics and high-end equipment manufacturing and developed independently seven types of magneto-rheology polishing machine tools and ion beam polishing machine tools, obtaining significant economic and social benefits.

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