Optics: measuring and testing – Velocity or velocity/height measuring – With light detector
Reexamination Certificate
2007-08-28
2007-08-28
Lee, Hwa (Andrew) (Department: 2886)
Optics: measuring and testing
Velocity or velocity/height measuring
With light detector
C356S482000, C356S478000
Reexamination Certificate
active
10745050
ABSTRACT:
This invention provides a device or method for measuring vibration with high sensitivity and over a wide bandwidth.A curved section is formed in an optical fiber. The curved section is disposed on a place to be measured. Light is input in the optical fiber, and then variation of frequency between the input light and the output light is detected.Infinitesimal vibration applied to the curved section can be measured as variation of frequency between the input light and the output light. Further, it is possible to measure vibration over a wide bandwidth.
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Kageyama, K., et al., “Fiber-Optic Laser Doppler Velocimetry Applied to AE Sensor,” The Japan Society of Mechanical Engineers,Proceedings of the 75thGeneral Meeting, vol. 2, Tokyo, Japan:94-95, 1998.
Kageyama Kazuro
Kanai Makoto
Nagata Keiichi
Ohsawa Isamu
Tsuchida Yukiya
Christensen O'Connor Johnson & Kindness PLLC
Lee Hwa (Andrew)
Toudai Tlo, Inc.
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