Li Duo, Li Na, Su Xing, Ji Peng, Wang Bo
Center for Precision Engineering, Harbin Institute of Technology, Harbin 150001, China.
Micromachines (Basel). 2019 Nov 28;10(12):828. doi: 10.3390/mi10120828.
Sinusoidal grid with nanometric precision is adopted as a surface encoder to measure multiple degree-of-freedom motions. This paper proposes the atmospheric pressure plasma processing (APPP) technique to fabricate an optical sinusoidal grid surface. The characteristics of removal function and surface generation mechanism are firstly presented. Both simulation and experiment validate the effectiveness of APPP to fabricate a sinusoidal grid surface with nanometric precision. Post mechanical polishing experiments show that APPP features can be well maintained while the surface roughness is greatly reduced to meet the optical requirement.
采用具有纳米精度的正弦光栅作为表面编码器来测量多自由度运动。本文提出了大气压等离子体处理(APPP)技术来制造光学正弦光栅表面。首先介绍了去除函数的特性和表面生成机理。仿真和实验均验证了APPP制造具有纳米精度的正弦光栅表面的有效性。后续的机械抛光实验表明,在大幅降低表面粗糙度以满足光学要求的同时,APPP的特性能够得到很好的保持。