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
TV wall mount
Process for preparing MDA via the stage of the aminal
Network traffic demotion
User interface for integrating applications on a mobile communication device
Multi-protocol data transfers
Process for preparation of Efavirenz
Probe for ultrasound diagnostic apparatus
  Randomly Featured Patents
Low-density cement compositions, density-reducing additives, and methods of use
EPL price change verification system and method
Vehicle interior door panel
Cabinet for a sewing machine and accessory items
Computer software testing method and apparatus
Actuator and actuator system
Golf club protective device
Light-emitting element, display device, and electronic appliance
Connector frame