Optics: measuring and testing – By dispersed light spectroscopy – Utilizing a spectrometer
Patent
1994-04-21
1996-01-02
McGraw, Vincent P.
Optics: measuring and testing
By dispersed light spectroscopy
Utilizing a spectrometer
G01C 1964
Patent
active
054813581
ABSTRACT:
The sensing coil of a fiber optic gyroscope is wholly or partially surrounded by a gel. The components attached to the coil, such as the directional coupler(s) and polarizer, may also be wholly or partially submerged in the gel. The gel is contained by a rigid housing, in which the inner walls of the housing form a cavity for the coil and the gel. The cavity is filled with the gel, and the gel may be bonded to the inner walls of the housing. The gel remains stiff enough to maintain the coil in a fixed position relative to the housing, and soft enough to avoid any significant effect on the h of the coil over the operating temperature range. Furthermore, the gel can be loaded with particles to adjust the specific gravity of the gel, to modify the thermal properties of the gel and to increase the viscosity of the gel for improved vibration damping. In a modified form, the optical-fiber sensing coil is positioned on a mounting surface and otherwise surrounded by the gel. Alternatively, the optical fiber sensing coil is wound around a form that has a layer of gel on the coil-supporting surface.
REFERENCES:
patent: 4669814 (1987-06-01), Dyott
patent: 4699451 (1987-10-01), Mohr
patent: 4702599 (1987-10-01), Mohr
Kaminow "Polarization in Optical Fibers", IEEE Journal of Quantum Electronics, vol. QE-17, No. 1, Jan. 1981.
Craig et al. "Interlaboratory Comparison of Polarization-Holding Parameter Measurements on High Birefringence Optical Fiber", Nat. Inst. of Standards and Technology (undated).
The Handbook of Epoxy Resins, McGraw Hill, "Setting Properties of Fillers," pp. 14-2-14-11.
Dow Corning.RTM., Q3-6575 Silicone Dielectric Gel "New Product Information" flyer (1984).
Bennett Sidney M.
Brooker Eric L.
Dyott Richard B.
Myhre John D.
Andrew Corporation
McGraw Vincent P.
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