Topic
Ring laser gyroscope
About: Ring laser gyroscope is a research topic. Over the lifetime, 2070 publications have been published within this topic receiving 18609 citations. The topic is also known as: Sagnac interferometer.
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Patent•
28 Feb 2003TL;DR: In this article, a path length control apparatus (PLC) for a ring laser gyroscope (RLG) provides a flattened surface for reflecting a laser beam, which is achieved by providing a void behind the mirror in the laser beam area.
Abstract: A path length control apparatus (PLC) for a ring laser gyroscope (RLG) provides a flattened surface for reflecting a laser beam. The flattened surface is achieved by providing a void behind the mirror in the laser beam area thus separating this area from stresses induced by temperature, voltage and/or displacement.
3 citations
TL;DR: In this paper, the dynamics and control of oscillations in a micromechanical ring resonator gyro that uses inertia properties of elastic waves are considered, and a functional diagram of the gyroscope with a ring resonance is presented.
3 citations
Patent•
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21 Dec 1988
TL;DR: In this article, a ring laser gyro is mounted at a rotational motion system, and the extent of its rotation speed, its direction and the like can be determined by deflections of both output beams.
Abstract: PURPOSE:To obtain a gyro which is able to detect an angle of rotation through a beam by transmitting a light introduced from a light emitting part to an annular interference part in the annular interference part clockwise as well as counterclockwise, thereby detecting its output beam at photodetector parts. CONSTITUTION:A light emitting part 7 is in the stand-by condition at a beam splitter part 4 in the transmission light introduction part of an interference part 2 and at the beam splitter part 5 as the transmission takeoff part of the above-mentioned interference part 2, two sets of photodetectors 8 and 9 which detect beams transmitted clockwise as well as counterclockwise in the interference part 2 are in the stand-by condition. Optical waveguides 3, 3, and 3 consisting of a single crystal fiber of the annular interference part 2 oscillate at 10 mW of threshold and oscillations are taken out of the photodetectors 8 and 9 through the beam splitter part 5 of the takeoff part. Once this ring laser gyro is mounted at a rotational motion system, the extent of its rotation speed, its direction and the like can be determined by deflections of both output beams.
3 citations
Patent•
26 Nov 1997TL;DR: In this article, a ring laser gyro is used to test a set of mirrors at different distances to plasma (12) in the gyros, and the test results are graphed to also allow prediction of ring laser life.
Abstract: Mirrors (8) are tested separately at different distances to plasma (12) in separate ring laser gyros. Testing mirrors a predetermined distance away from plasma (12) in the gyros allows accelerated testing of the environment of the mirros (8) in gyros. The test results are graphed to also allow prediction of ring laser gyro life.
3 citations
Patent•
10 Aug 1990
TL;DR: In this article, the polarity of the signals of the pick-offs (52, 54) and the output of the torque generator (48, 46) is switched over to obtain a measurement value.
Abstract: To eliminate gyroscope errors in electrically stabilised two-axis gyroscopes in which one pick-off (52, 54) and one torque generator (46, 48) are arranged on each input axis (X, Y) and the output from each pick-off (52, 54) arranged on one input axis is applied to the torque generator (48, 46) arranged on the other input axis, a first measurement is taken at a first direction of rotation of the gyroscope rotor (42). During a second measurement, the direction of rotation of the gyroscope rotor (42) is then reversed and, at the same time, the polarity of the signals of the pick-offs (52, 54) is switched over. From the gyroscope signals obtained during the two measurements, a measurement value is formed. … …
3 citations