Computer generated holography (CGH) for off-axis parabola (OAP) applications plays a significant role in optical metrology, particularly within optical measuring machine such as precision interferometer. This innovative approach leverages computational techniques to design holograms that can characterize and optimize the performance of off-axis parabolic mirrors. It is one of MG-Opitcs custom CGH with high test accuracy  1/100λ. This is the Ray Diagram of off-axis parabola with CGH The CGH converts a collimated wavefront to a diverging wavefront and off-axis angle varying slope to match the off-axis parabola.   CGH Benefits Interferometry provides excellent optical metrology for aspheric mirror. However, interferometers are limited in the surface or wavefront shapes that can be measured. Computer Generated Holograms (CGHs) deal with this shape limitation enabling measurement of aspheres, freeforms, Cylindrical surfaces, and off-axis Parabola while…

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surface accuracy measurement
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