White light interferometry (WLI) is a contact-free optical method for measuring surface height. It uses the phase difference between the light reflected off a reference mirror and the target ...

DURING a course of experiments with interferometers it was found that ... The D lines from a sodium burner are easily separable. If the interference pattern, using a copper or iron arc, is ...

One path of the HBT interferometer was 30 cm longer ... experiments and 72 mm for the studies on slow light. Both cells contained more sodium than necessary for a saturated vapour.