Table 1.

BioCD quadrature classes.

	Microdiffraction	Adaptive Optical	Phase-contrast	In-line	Land contrast
Near-field	Ridges or pits microfabricated on the disk	Printed protein on antinode surface	Printed protein on antinode surface	Printed protein on eighth-wave layer	Microetched mesas
Far-field	Apertured detector	Detector	Split detector	Detector	Detector