In conventional interferometry with long coherence length (laser interferometry), interference of light occurs over a distance of meters.
LISA will observe gravitational waves by measuring differential changes in the length of its arms, as sensed by laser interferometry.
By contrast, LISA is a dedicated mission that will use laser interferometry to achieve a much higher sensitivity.
Caltech is joined in the new observatory project by the Massachusetts Institute of Technology, which has also worked long and hard at developing the art of laser interferometry.
A more sensitive detector uses laser interferometry to measure gravitational-wave induced motion between separated 'free' masses.
By the 1970s, scientists including Rainer Weiss realized the applicability of laser interferometry to gravitational wave measurements.
His interests included precision measurement for time and length standards, particularly using hyperfine lines in the spectrum of cadmium and interference spectroscopy, laser interferometry and masers.
Tolerances were measured by laser interferometry, and the rotating tool heads were computer-controlled in three dimensions through five axes of movement.
This composite material proved to provide controlled rigidity and internal damping, minimizing distortion, as Dr. Peter Fryer determined by using laser interferometry on speaker cones.
Housing anechoic chambers and extensive Bruel & Kjaer measurement equipment, the research team investigated phase linearity and speaker cone construction using laser interferometry.