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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TL;DR: In this paper, a dual-axis sensing gyroscope based on SAW (surface acoustic wave), in which two substrates are bonded together and completely sealed, has been proposed for detecting multi-axis Coriolis forces at a time as well as protecting the sensor surface.
14 citations
Patent•
30 Apr 1998
TL;DR: A gyroscope (36) includes a gyro body-portion (48, 50, 52 or 54) which is driven into vibratory primary oscillation P and, if turned about on axis X, Y or Z experiences a Coriolis force induced vibration as discussed by the authors.
Abstract: A gyroscope (36) includes a gyro body-portion (48, 50, 52 or 54) which is driven into vibratory primary oscillation P and, if turned about on axis X, Y or Z experiences a Coriolis force induced vibration. Matching the primary oscillation mode and the secondary modes allow one to accurately detect motion about one, two or three axis.
14 citations
TL;DR: The resonance asymmetry rate dropped from 34.2% to 2.9% after optimization of the backscattering noise and the polarization noise, which greatly improved the bias stability and the scale factor linearity of the proposed system.
Abstract: The resonant microsphere gyroscope is proposed based on a double Faraday rotator system for the resonant microsphere gyroscope (RMSG) that is characterized by low insertion losses and does not destroy the reciprocity of the gyroscope system. Use of the echo suppression structure and the orthogonal polarization method can effectively inhibit both the backscattering noise and the polarization error, and reduce them below the system sensitivity limit. The resonance asymmetry rate dropped from 34.2% to 2.9% after optimization of the backscattering noise and the polarization noise, which greatly improved the bias stability and the scale factor linearity of the proposed system. Additionally, based on the optimum parameters for the double Faraday rotator system, a bias stability of 0.04°/s has been established for an integration time of 10 s in 1000 s in a resonator microsphere gyroscope using a microsphere resonator with a diameter of 1 mm and a Q of 7.2×106.
14 citations
13 citations
Patent•
29 Jun 1981TL;DR: In this article, an optical wedge attached to the output mirror allows the center of support to include the line of symmetry of the block, thereby reducing temperature gradients, which could cause output signals in the absence of an input angular rate across the instrument.
Abstract: A ring laser gyroscope having a triangular block configuration is dithered about its center of gravity. An optical wedge attached to the output mirror allows the center of support to include the line of symmetry of the block, thereby reducing temperature gradients, which could cause output signals in the absence of an input angular rate across the instrument. The optical wedge, a mirror and a beamsplitter form an interferometer to compensate the output signal of the ring laser to produce an output free from influence of the dither motion. The mirror and beamsplitter are adjustable to allow for small corrections necessary to exactly compensate the dither-motion and to achieve 90° phase shift between the outputs from photodetectors.
13 citations