21. Additional laser microscopy techniques include harmonic microscopy, four-wave mixing microscopy and interferometric microscopy. 22. Binary stars which can be interferometric methods are known as " visual binaries ". 23. In 1999, S�derhjelm published an orbit using speckle-interferometric data together with Hipparcos observations. 24. In the infrared, the array has an interferometric imaging resolution of 0.0005 arcseconds. 25. The gauge's nominal length is also known as the " interferometric length ". 26. A gas disk was discovered by interferometric observation of carbon monoxide ( CO ) emissions in 1986. 27. In 1998 he was the chair of the Australian Consortium for Interferometric Gravitational Astronomy ( ACIGA ). 28. Other interferometric studies with multiple telescopes, operating in the infrared, have imaged and confirmed this phenomenon. 29. Construction began in 1996 for six 1-meter telescopes by the optical interferometric array at the time. 30. For instance, in experiments using ring lasers together with rotating disks, or in neutron interferometric experiments.
