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Knowledge Center/ Technical Frequently Asked Questions/ General Frequently Asked Questions/ Optics/ Is there a limit to the range of angles in which a CGH can be used?

Is there a limit to the range of angles in which a CGH can be used?

A CGH has a minimum feature size in its interference pattern that limits the maximum possible diffraction angle. This is why an aspheric CGH is often used along with a reference sphere in the interferometer to reduce the required diffraction angles.

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