2023年6月15日 · MacGovern 和J. C. Wyang提出在干涉测量中使用计算全息 (Computer Generated Holograms, CGH)对非球面进行检测，随后该技术在高精度光学元件检测（非球面 …

2020年12月11日 · 该检测方法与零位补偿器检测法相同，通过计算全息图的光学波前被全息条纹衍射成为一束相位被“整形”的光学波前，变成与待测光学表面形状一致的光学波前，实现零位补 …

2017年12月21日 · In this paper, we present the design, fabrication and optical characterization of computer-generated holograms (CGH) encoding information for light beams carrying orbital …

2008年9月1日 · Computer-generated hologram (CGH) is a diffractive optical element that has been commonly used as wavefront corrector in the interferometer and can be accurately...

2009年6月15日 · Computer-generated holograms (CGH) have been widely used to evaluate symmetrical aspherical surfaces in combination with Fizeau interferometers. Because the …

Computer-generated holograms (CGH) have been widely used for years in optical testing of aspheric surfaces in combination with Fizeau interferometers. With the

A CGH for testing a cubic phase plate with duty cycle 0.5 is fabricated by using e-beam lithographic techniques. In this situation, the contrast of the interference fringe pattern can …

CGH TEST PLATES Convex spherical surfaces are commonly measured with matching concave test plates. When the test plate is sup-ported near the convex optic and illuminated with suf. …

As one of the most promising methods in all the interferometric null tests, computer-generated holograms (CGH) can also be used in unsymmetrical aspherical surfaces testing. Taking the …

Typical CGH plates are consist of a main CGH to compensate the aspheric wavefront from the test optics and a few alignment CGHs to align the interferometer, CGH, and the test optics. …