Resources Contact Us Home
Sensor for measuring a vibrating surface obscured from view

Image Number 5 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
Retransmission and retransmission request in data communication systems
Light emitting diode package and method of fabricating the same
Inhibition of HRP-3 using modified oligonucleotides
Steering wheel
Systems and methods for determining muscle force through dynamic gain optimization of a muscle PID controller for designing a replacement prosthetic joint
Method and apparatus for generating soft bit values in reduced-state equalizers
Method and system for processing dictated information
  Randomly Featured Patents
Method and apparatus for thermal spraying cylindrical bores
Capacitor-type pulse generator for electrical discharge machining, especially for wire-cutting EDM
Equipment for engaging a safety braking device for a lift cage
Image processing apparatus for selectively using MTF correction process for different regions of a composite image
Article of seating furniture
1-substituted 5-fluorouracil useful for inhibiting the aggregation of platelets
Amphora aggregates and the process for their preparation
System and method for audio caller identification service
Wheels for roller skates and the like
Process for the production of L-arginine by fermentation