title: Quasimonochromatic white light fringe interferometer.
abstract: Quasimonochromatic light sources, such as laser diodes and high power LEDs, are investigated to determine their suitability for zero path difference determination using white light fringes in a Michelson interferometer. Fringe visibility curves are theoretically determined for various combinations of light sources and compared with experimental results when used in a Michelson interferometer with a 25-m path length. A resolution of 2-3 microm was obtained for a pair of multimode laser diodes and also for a single multimode laser diode operated as an LED. This is more than adequate for the calibration of survey baselines.
authors.forename: B K
authors.initials: BK
authors.lastname: Ward
authors.forename: K
authors.initials: K
authors.lastname: Seta