Output optics detection system
Номер патента: CA2022330C
Опубликовано: 27-12-1994
Автор(ы): David Barnett Hall, Kenneth W. Shafer, Robert Anthony Mitchell
Принадлежит: Litton Systems Inc
Опубликовано: 27-12-1994
Автор(ы): David Barnett Hall, Kenneth W. Shafer, Robert Anthony Mitchell
Принадлежит: Litton Systems Inc
Реферат: A ring laser gyroscope output optics detection system, including a rotational sensing system and cavity length control system for a multioscillator ring laser gyroscope, is disclosed herein that can operate with a simple upright symmetric optics mechanism, where the reguired signal separation is performed fully electronically. In a preferred embodiment, signal separation circuitry is provided which performs a 90° or .pi./2 radians phase shift to one of a set of heterodyned signals in order to extract the Sagnac effect modulated Faraday frequency signals WA and WB. In order to deal with the inherent problems of crosstalk present in a Faraday biased system, alternative signal separation schemes suggest the use of a 45° or .pi./4 radians phase shift, as well as a 60° or .pi./3 radians phase shift. Complementary cavity length control schemes are presented in both fixed component and digitally controlled formats.
Laser gyroscope output optics structure
Номер патента: CA1088657A. Автор: James B. Matthews. Владелец: Raytheon Co. Дата публикации: 1980-10-28.