【作者】 郑文佳； 王春鸿； 姜文汉； 李梅； 唐端午；

【Author】 ZHENG Wen-jia,WANG Chun-hong,JIANG Wen-han,LI Mei,TANG Duan-wu 1.The Institute of Optics and Electronics,the Chinese Academy of Sciences,Chengdu 610209,China 2.Graduate School of the Chinese Academy of Sciences,Beijing 100039,China

【机构】 中国科学院光电技术研究所； 中国科学院研究生院；

【摘要】 提出了一种基于FPGA的单斜率计算单元的高速实时波前斜率处理方法,并采用移位寄存器保存中间结果以避免地址生成和从储存区中存取数延时。针对48个子孔径、61单元自适应光学系统,在FPGA上进行了波前斜率计算的实现。实验证明,该方法能满足自适应光学高速实时波前斜率处理,并具有实时性强、节省硬件资源、控制流数据流简单易于硬件实现的优点,在子孔径数目排布不同时只需改变移位寄存器深度和修改控制表中的内容即可,具有很好的通用性和扩展性。更多还原

【Abstract】 A fast-speed real-time wavefront slope processing method bases on single gradient calculation unit is proposed.Meanwhile middle results are saved using shift register in order to avoid address generation and reduce the delay of accessing memory.As an example,the wavefront slope calculation of 61-element 48 Subaperture adaptive optical system is implemented on FPGA.Experimental results indicate that the method has the following advantages:real-time calculation,economical hardware resources usage,simple data flow and control flow.By changing control table and the depth of shift register,this method can also be used on the adaptive optical system with different sub -aperture layouts and different sub -aperture numbers.Therefore,this method has strong expansibility and general-purpose character.更多还原