Combined computer-generated hologram for testing steep aspheric surfaces.
Combined computer-generated hologram for testing steep aspheric surfaces.
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DOI：
10.1364/oe.17.005420
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发表时间：
2009-03
期刊：
影响因子：
3.8
通讯作者：
A. Poleshchuk;R. K. Nasyrov;J. Asfour
中科院分区：
文献类型：
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作者：
A. Poleshchuk;R. K. Nasyrov;J. Asfour
提出了一种新型的组合(或多路)计算全息图(CGH)和一种陡峭的轴对称非球面的干涉检测方法。该方法基于包含两种不同衍射结构的混合计算全息图。提出的新型衍射菲佐零透镜(DFNL)设计消除了计算全息基片的透射波前失真，提高了表面测试的精度。通过对f数为f/0.65的球面参照镜的测试，验证了该方法的有效性。
A novel type of a combined (or multiplex) computer-generated hologram (CGH) and a method for interferometric testing of steep axially symmetric aspheres is presented. The method is based on a hybrid CGH containing two different diffractive structures. The presented new type of Diffractive Fizeau Null Lens (DFNL) design eliminates the transmitted wavefront distortion (TWD) of the CGH substrate and increases the accuracy of the surface test. The method was approved by testing a spherical reference mirror with an f-number of f/0.65.