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根据圆形计算全息图的衍射特性,将曲面圆形计算全息图与补偿镜相结合,应用于凹非球面折射式零检测光学系统中。与传统的折射式零检测光学系统相比,该系统不仅可以简化光学系统的装调过程,还可以降低计算全息图与补偿镜的制作精度,减少制作成本。阐述了利用曲面计算全息图衍射特性的折射式零检测光学系统检测凹非球面的基本原理,给出了具体的设计实例。对于口径为950mm的抛物面,检测结果P!V值为0.024λ。
According to the diffraction characteristic of circular computed hologram, the circular circular hologram is combined with the compensating mirror and applied to the concave aspheric refractive zero detection optical system. Compared with the traditional refractive zero detection optical system, this system can not only simplify the setup process of the optical system, but also reduce the manufacturing precision of the calculation hologram and the compensation mirror and reduce the manufacturing cost. The basic principle of detecting the concave aspheric surface by using refractive zero detection optical system based on the diffraction characteristic of the hologram is described. The design example is given. For a paraboloid with a diameter of 950 mm, the P! V value of the test result is 0.024 [lambda].