Why is alignment critical in a CGH test?

In contrast to spherical optics, misalignment of aspheres and freeforms cannot be perfectly compensated with other alignment degrees of freedom.

The wavefront error associated with non-spherical test optic misalignment directly impacts measurement accuracy and can lead to erroneous manufacturing feedback.

Learn more about the misalignment of non-spherical optics.

To reduce test optic misalignment, CGHs can be designed with specialized alignment patterns that target the UUT and co-located reference targets on a metrology platform.

Additionally, Morpheus™ data reduction software from AOM can fit and optionally subtract freeform misalignment modes from test data.