21 December 1981 Ring Laser Gyroscopes�Charge-Coupled Device (CCD) Readout And Signal Processing For High Resolution Applications
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Abstract
Recent advances in Charge-Coupled Device (CCD) imaging detectors and high speed digital signal processors have prompted the investigation of a new class of Ring Laser Gyroscopes (RLG) at The Aerospace Corporation. Because of the demands, such as survivability, reliability, long life, high accuracy and resolution, and wide dynamic range, that will be made by future space systems on inertial reference technology, the RLG will be increasing in importance in future missions. However, thus far, little consideration has been given to sophisticated techniques for the readout and analysis of the RLG's output interference fringe pattern. This paper presents a system concept of a new technique for sensing and analyzing the fringe pattern produced by a RLG. The system hardware utilizes CCD imaging detectors for multiple channel sensing and digital memory for recording the fringe patterns. The system software employs digital filtering algorithm for converting the fringe movement to incremental angles. This signal processing technique greatly enhances the resolution of RLG's output.
© (1981) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
T. A. Fuhrman, R. W. Svorec, A. Y. Lee, R. M. Shima, "Ring Laser Gyroscopes�Charge-Coupled Device (CCD) Readout And Signal Processing For High Resolution Applications", Proc. SPIE 0295, Control and Communication Technology in Laser Systems, (21 December 1981); doi: 10.1117/12.932415; https://doi.org/10.1117/12.932415
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