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鉴于计算全息图可以产生一个任意形状的波面,用它作为位相补偿板来制作全息凹面光栅以适应消象差的要求比普通光学全息法更具灵活性,而且消象差波长的选择也不受制作时所用的光源光波波长所限制。本文中采用了离轴滤波及改变参考波面特性等措施,大大提高了计算全息图的空间带宽积,扩大了这一方法的使用范围。对1200l/mm的Ⅲ型及Ⅳ型凹面全息光栅进行了设计,制作及实验验证。
In view of the calculation of hologram can produce a wave shape of arbitrary shape, use it as a phase compensation plate to make holographic concave grating to meet the demand of aberration aberration more flexible than the conventional optical holography, and the selection of the aberration wavelength is not The wavelength of the light used in the production of light is limited. In this paper, off-axis filtering and changing the characteristics of the reference wave surface are used to greatly increase the space-bandwidth product of the computed hologram and enlarge the application scope of this method. Design, fabrication and experimental verification of Type III and Type IV concave holographic gratings of 1200l / mm.