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将两块漫射板分别置于输入面的两侧,使物光和参考光同光轴,可以使体全息存储傅里叶变换光学系统更为紧凑。然而,在这种全息存储光学系统中,物光和参考光的总数值孔径较物光数值孔径大很多。分析这种体全息存储光学系统物光和参考光光路的设计要求和光学参量的确定;采用多重结构方法对物光正向光路、逆向光路和参考光光路同时优化设计,实现对物光光路二对物像共扼位置控制像差,并满足参考光光路的要求;给出前后组焦距分别为33 mm和30 mm的物光和参考光同光轴,前工作距为30 mm,物光和参考光总数值孔径为0.53的全息存储光学系统的设计结果。系统的波像差小于0.071λ,达到衍射极限。
Placing two diffuser plates on each side of the input face, with the object light and the reference light at the optical axis, makes the volumetric holographic storage Fourier transform optical system more compact. However, in such a holographic storage optical system, the total numerical aperture of the object light and the reference light is much larger than the object numerical aperture. The design requirements and optical parameters of the object light and reference light path of the holographic storage optical system are analyzed. The multi-structure method is used to optimize the design of the forward light path, the reverse light path and the reference light path simultaneously, Object-like conjugate position control aberration and meet the requirements of the reference light path; given the front and rear group focal lengths were 33 mm and 30 mm of the object light and reference light with the optical axis, the former working distance of 30 mm, the object light and reference Design results of a holographic storage optical system with a total light numerical aperture of 0.53. The systematic wave aberration is less than 0.071λ, reaching the diffraction limit.