Resources Contact Us Home
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
Graphical user interface for interpreting the results of image analysis
Memory component and memory device
Die seal ring
Method of forming solderable side-surface terminals of quad no-lead frame (QFN) integrated circuit packages
Format for providing traffic information and a method and apparatus for using the format
Compositions and methods for activating innate and allergic immunity
  Randomly Featured Patents
Composite cutting inserts and methods of making the same
Method and apparatus for high speed graphics fill
Comparator bank of A/D converter
Balancing device for a drum washing machine
Golf club and golf club set
Rotary fluid machinery, vane fluid machinery, and waste heat recovery device of internal combustion engine
Vehicle control system having two trackside signal lines
Signal decoding method and apparatus
Flow control device for administration of intravenous fluids
Heat exchange unit for pseudo-isothermal reactors