CGH for Off-Axis Parabola

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 keeping the many desirable aspects that interferometry provides.

Fast, non-contact, high precision, high resolution, full aperture measurement – a unique and valuable combination in optical metrology.

Flexible – measure nearly any optical surfaces.

Custom Design- MG-Optics provide custom design for your requirement for nearly any test wavelength to suit the test system requirements or interferometer wavelength.

Easy to alignment – MG-Optics will deliver you  CGH mount and operation manual with CGH product together.