1. A fiber optic acoustic sensor array is based upon a Sagnac interferometer rather than being based upon Mach-Zehnder interferometers as in known acoustic sensor arrays.

2. Interferometer

3. Photometers, nephelometers, turbidimeters, interferometers, retractometers, detectors

4. Passive interferometer equipment;

5. Compact linnik interferometer

6. Far-IR Interferometer.

7. "Michelson Interferometer Operation".

8. Short-coherence interferometer

9. Passive interferometer equipment.

10. c. Passive interferometer equipment.

11. c. passive interferometer equipment.

12. Polarimeter employing a fizeau interferometer

13. Interferometer and fourier-transform spectroscopic analyzer

14. Direction finding interferometer internal calibration system

15. An adjustable interferometer includes an optical input head to couple the interferometer to a light source.

16. Today, images with very high resolution are obtained using interferometers.

17. They are also used in optical parametric oscillators and some interferometers.

18. Most interferometers use light or some other form of electromagnetic wave.

19. Sagnac interferometer and reflective modulator comprising same

20. Interferometric measurement process and laser interferometer therefor

21. Shape measuring device using frequency scanning interferometer

22. Polarization diversity optical interferometer and microscope using same

23. The present invention relates to interferometers (200-900) with adjustable path length differences (lags).

24. Occasional calibration phase-difference modulation for sagnac interferometer

25. Fiber optic acoustic sensor array based on sagnac interferometer

26. a detector: a differential refractometer or an interferometer refractometer

27. Dense wavelength division multiplexer utilizing an asymmetric pass band interferometer

28. Interferometer for tsv measurement and measurement method using same

29. Large radio interferometers have been used to map the active jets emitted from active nuclei.

30. Modulation interferometer and fiberoptically divided measuring p robe with light guided

31. These subheadings do not include interferometers for checking plane surfaces, used in laboratories (subheading 9027 50 00).

32. The CSO and JCMT were combined to form the first submillimeter interferometer.

33. These subheadings do not include interferometers for checking plane surfaces, used in laboratories (subheading 9027 50 00 ).

34. Velocity interferometers for measuring velocities exceeding 1 km/s during time intervals of less than 10 microseconds.

35. An Arrayed waveguide grating (AWG) is a generalization of the Mach-Zehnder interferometer

36. The twin Keck Telescopes on Mauna Kea regularly team up as an interferometer.

37. An antenna and system for determining azimuth of input signals includes ambiguous and non-ambiguous circular array interferometers.

38. The interferometer (12) has a semiconductor optical amplifier (38) coupled in each arm.

39. 6A225 Velocity interferometers for measuring velocities exceeding 1 km/s during time intervals of less than 10 microseconds.

40. The combination of the polarization control and the active phase stabilization of the interferometer at Bob's end allows for the stable operation of the interferometer when used as part of a one-way QKD system.

41. Interestingly, an advanced laser interferometer gravitational-wave detector may provide the answer to this fundamental question.

42. A large number of acoustic sensors can be multiplexed into the architecture of the Sagnac interferometer.

43. An interferometer (150) which processes the phase modulated light and generates at least one output signal.

44. The interferometer has an optical path difference not equal to zero at each optically detected object element.

45. An optical gain module (OGM) in the form of an active Mach-Zehnder interferometer (MZI) is provided.

46. ALMA produces high-quality interferometer images at wavelengths in the range between infrared light and radio waves.

47. In the experiment, we anda six - photon interferometer to teleport an arbitrary polarization state of two photons.

48. The present invention provides means for correcting interferometer alignment errors through the use of corrective elements (412).

49. An interferometer optical element (30) is provided with a birefringent material (44) in the light path.

50. The success of this experiment was important in pushing ahead the construction of the Submillimeter Array and the Atacama Large Millimeter Array interferometers.

51. A magnetic interferometer (10) for performing nondestructive magnetic induction testing and inspection of wire rope and cable (12).

52. A piezo actuated Fabry-Perot interferometer operating in Mid IR was chosen to be used in future prototypes.

53. In an interferometer for measuring displacements of a movable structural component, comprising a measurement interferometer arrangement (1), a partial beam traverses a measurement branch of variable optical length and is guided by an adjustable reflector system (11) connected to the movable structural component.

54. Height scanning interferometer for determining the absolute position and surface profile of an object with respect to a datum

55. 4) shows an exemplary measurement using the Zygo Verifire Asphere ™, a laser interferometer performing multi zonal measurements

56. Fibre-optic multiwavelength interferometer (mwli) for the absolute measurement of distances and topologies for surfaces at a large operating distance

57. Images of hotspots on the surface of Betelgeuse taken at visible and infra-red wavelengths using high resolution ground-based interferometers Perrin, Guy; Malbet, Fabien (2003).

58. Interferometer serve for measuring of length, refractive indices, angles and spectroscopy to check interferences (overlapping light waves) for precison measurements.

59. Fizeau used a special interferometer arrangement to measure the effect of movement of a medium upon the speed of light.

60. The low sensitivity inherent in the double-exposure grating interferometer makes it useful for measuring the absolute phase variations of highly aberrant samples.

61. Such devices should be modified for an amplitude modulation or complex modulation of coherent light according to the principle of the Fabry-Perot interferometer.

62. In 1921 Albert A. Michelson made the first measurements of a stellar diameter using an interferometer on the Hooker telescope at Mount Wilson Observatory.

63. The feedback system may include an interferometer system, a corneal polarimetry system, or other configurations for monitoring cross-linking activity within the cornea.

64. An analyzer (9), fitted to the output of the interferometer, transmits an adjustable polarization state P¿det?, whereby an additional wavelength-dependent phase difference $g(g)($g(l)) occurs between the partial waves of the spectral components. $g(g)($g(l)) can be adjusted to obtain compensation of dispersion or an increase in the spectral resolution of the interferometer.

65. If required, the frequency modulated light (FM) may be converted into intensity modulated (IM) light by using an additional narrow band optical filter, e.g. Mach-Zehnder interferometer.

66. So after decades of development, construction and imagination and a breathtaking amount of hard work, they built their detector, called LIGO: The Laser Interferometer Gravitational-Wave Observatory.

67. There is a second Keck telescope under construction adjacent to the original, now called Keck I, and the two telescopes may be able to function as an optical interferometer.

68. The sensor systems measure a magnetic field using inorganic and/or organic magneto-optically active materials, e. g. polymer material and have an interferometer based on Faraday rotation.

69. The aim of invention is to enable the amplitudes of selected spectral lines in the output signal from a ring interferometer to be determined simply and with the greatest possible accuracy.

70. A polarimeter based on a modified Fizeau interferometer and a method for measuring the optical rotation of a polarized light beam by an optically active substance using the polarimeter, are provided.

71. That laser is actively stabilised in amplitude, frequency and position, in order to not inject additional noise in the interferometer, and hence to improve the sensitivity to the gravitational wave signal.

72. Preferably the photoacoustic cell comprises at least one cantilever microphone (13) and a compact Michelson interferometer (16) for measuring an acoustic signal produced by the at least one cantilever microphone (13).

73. The Biod MOX is a versatile screening workstation based on Increase Relative Optical Power (IROP) techonology, which relies on the interferometric optical signals of two interferometers as a biosensing method of quantifying the biomolecule accumulation or recognition in the sensing area.

74. A Birefringent interferometer system is described which uses nematic liquid crystal cells to produce variable optical path differences (OPD) between light of different polarization states that are interfered at a polarizing analyzer

75. Static measurement of optical output power versus the pressure on membrane reveals more than one period of Fabry-Perot interference, thereby generating a Fabry-Perot diaphragm-fiber interferometer device accurately reproducing audible acoustic wave.

76. The beamsplitter directs light reflected from the wafer surface (24) back into an interferometer camera to provide depth of focus and aberration information to a computer (16) which activates and selectively deforms the deformable mirror (6).

77. SWIFT ON GCOM-A1 Phase A activities are in progress at NASDA, ESA and CSA for the potential flight of the Stratospheric Wind Interferometer For Transport studies (SWIFT) instrument on board the NASDA GCOM-A1 satellite.

78. It is a matter of immense pride for all of us that 37 Indian scientists from nine Indian institutions participated in the international Laser Interferometer Gravitational Wave Observatory (LIGO) Collaboration and proved this theory correct three years ago.

79. The OCT device includes: a light source unit emitting a coherent light; an interferometer unit generating an interference pattern from a sample measured by receiving incident light emitted from the light source unit; the receiving unit receiving the interference pattern emitted from the interferometer unit and converting the interference pattern into an electrical signal; and a processing unit creating an image from data obtained by the receiving unit, wherein the processing unit can group the obtained data into a plurality of data sets and process the plurality of data sets in parallel.

80. * They noted with satisfaction that the charter for the Joint Oversight Group (JOG) for the Laser Interferometer Gravitational-Wave Observatory (LIGO) project in India has been signed and the final site for establishing the LIGO project in India identified.