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The reporter learned from the Changchun Institute of Optics and Mechanics of the Chinese Academy of Sciences that the development of the national large-scale high-precision diffraction grating scoring system undertaken by the institute has passed the acceptance test and produced the world's largest area echelle. This indicates that the related technology in the manufacture of large-area high-precision gratings in China has reached the international leading level, ending the situation of being subject to people in the field of high-precision large-size grating manufacturing.
Diffraction grating is a kind of precision optical component with nanometer precision periodic microstructure. It has important applications in the fields of spectroscopy, astronomy, laser, optical communication, information storage and so on. A large grating area can achieve high etendue and resolution power, and high precision can obtain a better signal-to-noise ratio, but the manufacture of a large and precise grating is a worldwide problem.
The grating scriber is the mother machine for making gratings. Because of the difficulty in processing and adjusting the components, the operation guarantees the environment and the environment is high. It is known as the “king of precision machineryâ€. The grating scriber developed by this project has almost all the key components. Shock the world's limit level. During the development, the researchers broke through a series of key technologies such as precision machining, precision optical processing, precision inspection, high-precision micro-displacement control, and developed a grating with an area of ​​400 mm × 500 mm and an accuracy of 10 nm. The largest echelle grating in the world.
Previously, only the United States was able to produce intermediate-step gratings of more than 300 mm. China's echelle gratings have a manufacturing capacity of less than 300 mm and accuracy of less than 10 nanometers. The high-precision large-size gratings required in strategic high-tech fields are severely restricted by foreign countries. . The project leader and researcher of the Changchun Institute of Optics and Mechanics of the Chinese Academy of Sciences Tang Yuguo said that the successful development of large-scale high-precision grating scribing system and large-area echelle grating can help China's spectroscopic instrument industry to get rid of the situation of “unintentional and unintentional†and change the spectrum instrument industry in China. The low-end status of the industry.