Laser gyro cavity length control reflecting mirror assembly
A laser gyroscope and cavity length control technology, applied in the field of laser gyroscope, can solve the problems of large temperature difference and low reliability, and achieve the effects of improving accuracy, enhancing anti-vibration ability, and simple and easy installation.
Inactive Publication Date: 2011-11-09
FLIGHT AUTOMATIC CONTROL RES INST
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Problems solved by technology
[0006] The purpose of the present invention is: in order to solve the problem that the prior art laser gyroscope cavity length control reflector assembly is greatly affected by temperature difference, the stress caused by thermal expansion mismatch, and the problem of low reliability in vibration environment, the present invention provides a Anti-skew ability and micro-displacement efficiency, laser gyroscope cavity length control mirror assembly with better reliability
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[0013] The present invention will be described in further detail below by means of specific embodiments:
[0014] see figure 2 , which is a structural schematic diagram of a preferred embodiment of the laser gyro cavity length control mirror assembly of the present invention. In this embodiment, the laser gyro cavity length control mirror assembly includes a driving bracket 8 , an air outlet 9 , an axially deformable rib 10 , and a mirror base 11 . Wherein, the reflector base 11 is made of a glass-ceramic material with zero expansion coefficient (such as Zerodur), and is an axisymmetric cylindrical structure with grooves at the upper and lower ends, and the central column and the upper and lower end surfaces of the circular cylinder are all in the In the same plane, several layers of dielectric films 12 are plated on the lower end surface of the central column for reflecting the light beam in the resonant cavity of the laser gyro. The axially deformed rib 10 is also made of...
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The invention relates to a laser gyro cavity length control reflecting mirror assembly, comprising a driving arm, an axial deformation fin and a reflecting mirror base body. The reflecting mirror base body, the driving arm and the axial deformation fin are made by zero expansion coefficient microcrystal glass material, the reflecting mirror base body and the driving arm are all in axial symmetry cylinder structure with the upper and lower ends slotted, the shapes and dimensions of the two are the same, the driving arm and the reflecting mirror base body are connected and fixed by virtue of the axial deformation fin, and the three are coaxial, the lower end face of the central cylinder of the reflecting mirror base body is provided with a plurality of dielectric films, so as to reflecting light beams in a laser gyro resonant cavity, a thin fin is arranged on the driving arm close to the upper end face thereof, and the upper and lower faces of the thin fin are all connected and fixed with an annular piezoelectric ceramic plate. The invention improves anti-deflection twisting capability and micro displacement efficiency of cavity length control reflecting mirror, has strong environmental adaptability and also gives condition to production cost control, thus having great practical application value.
Description
technical field [0001] The invention belongs to laser gyroscope technology, and relates to a laser gyroscope cavity length control reflector assembly. Background technique [0002] The laser gyro is based on the Sagnac effect, and relies on measuring the frequency difference between the positive and negative laser beams in the resonator to measure the rotation angle of the carrier relative to the inertial space. Laser gyroscope is the preferred inertial sensor for strapdown inertial navigation system because of its advantages of instant start, shock resistance and vibration, and has been widely used in military and civilian fields. [0003] High and low temperature is one of the main factors affecting the performance of laser gyroscopes, which restricts the application of laser gyroscopes. The cavity length control mirror is configured in the laser gyroscope, which can compensate the change of the cavity length of the laser gyroscope cavity caused by temperature changes, mak...
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IPC IPC(8): G01C19/64
Inventor 刘元正张明辉
Owner FLIGHT AUTOMATIC CONTROL RES INST