【摘要】 提出利用复用计算全息元件实现多阶模式同步的偏置模式波前传感器。对基于复用计算全息元件的多阶模式偏置波前传感器进行了理论分析。为了实现复用计算全息元件,分别编码设计了包含4阶,10阶和20阶Zernike像差模式的复用计算全息图,讨论了复用计算全息图设计中几个关键问题。数值模拟研究了复用计算全息图对单阶和多阶像差模式的探测性能。结果表明,在一定探测范围内,传感器能够响应与全息图内预先记录像差模式相同的待测像差模式,且每一个模式的灵敏度都不同。全息图内记录模式数较少时,单阶模式探测的灵敏度较大;记录模式数越多,模式之间擦除效应越严重,单阶和多阶模式灵敏度都受到一定影响。更多还原

【Abstract】 We propose to implement simultaneous multi-mode-biased modal wavefront sensor(MMBWS) by utilizing a multiplexed computer-generated holographic element(MCGHE).The theoretical treatments of MCGHE used as MMBWS is presented.To realize the MCGHE,three multiplexed computer-generated holograms(MCGHs) are designed by coding 4,10 and 20 Zernike aberration modes,respectively.Several critical problems relevant with the designing of MCGH are discussed.The performance of detecting single and multiple aberration modes by employing MCGH is numerically simulated.The results indicate that,within typical range of amplitude,the tested aberration modes can be responded by MMBWS if they are identical with those coded in the MCGH,and the sensitivities corresponding to each mode are different.Once the number of coded aberration modes is small,the sensitivity of the single mode will be large enough;the more the aberration modes are coded,the more severe erasure effect among the aberration modes will exist,thus the sensitivity of both the single and the multiple modes will be affected.更多还原