论文部分内容阅读
连续相位板(CPP)是大型激光装置中用于控制光束形状、能量和波前分布的一种重要衍射光学元件。为改善聚焦光束的质量,建立了基于现有工艺的大口径CPP理论设计模型,优化了传统衍射元件设计算法。采用该算法设计了用于背光照明的Ф330mm CPP,开展了数控化学抛光制作CPP试制,并在大型激光装置上开展了验证实验。结果表明,基于工艺改进算法设计的CPP具有更好的加工特性和焦斑性能,基本实现了整形和匀滑性能,能够较好满足现有工艺约束条件和物理需求。
Continuous phase plates (CPPs) are important diffractive optical elements used in large laser devices to control beam shape, energy and wavefront distribution. In order to improve the quality of the focused beam, a large-caliber CPP theoretical design model based on the existing process is established and the traditional diffraction element design algorithm is optimized. The Ф330mm CPP designed for backlighting was designed by this algorithm, and the CPP trial production by NC chemical polishing was carried out. The verification experiment was carried out on a large laser device. The results show that the CPP designed based on the improved process algorithm has better processing characteristics and focal spot performance, and basically achieves shaping and smoothing performance, and can better meet the existing process constraints and physical requirements.