Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
Sensor for measuring a vibrating surface obscured from view










Image Number 8 for United States Patent #7564567.

Described are a sensor and a method for measuring a vibration of a surface obscured from view. The sensor includes a narrowband source of a terahertz beam, a beamsplitter, a beam combiner and a terahertz detector. The beamsplitter splits the terahertz beam into a sample beam for irradiating the surface and a reference beam. The beam combiner combines the sample beam scattered from the surface and the reference beam. The terahertz detector generates an electrical signal based on a modulation of the power of the combined beams due to the vibrating surface. The electrical signal indicates a characteristic of the surface vibration. Homodyne or heterodyne detection can be utilized. Advantageously, the sensor can see surfaces that are covered, concealed or otherwise obscured behind optically opaque materials, including plastic, cloth, foam, paper and other materials. Thus the sensor has a wide variety of applications where conventional vibrometers are not practical.








 
 
  Recently Added Patents
Die seal ring
Polarization-coupled ferroelectric unipolar junction memory and energy storage device
Image processing device, image processing method, and program
Semiconductor process
Puncture resistant fabric
Heap/stack guard pages using a wakeup unit
Automatic engine oil life determination with a factor for oil quality
  Randomly Featured Patents
Tissue paper containing a vegetable oil based quaternary ammonium compound
Hydraulic device for pumping molten metal and/or controlling a molten metal flow
Wheel damping
Inline tandem pump
Fluorometry method and apparatus using a semiconductor laser diode as a light source
Display device having a display cabinet with rib portions surrounding the rim of a front and back cover
Dispenser for air treating material
N-vinylformamidopropionates and process for their synthesis
Cooling air passage apparatus of refrigerator
System and method for testing electrical generators