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
Artificial fish habitat employing fish hiding units
Medical instrument handle with connector
Radio navigation
Flexible antenna
Image forming apparatus, and control method and storage medium therefor
Method for preparing immunoglobulin libraries
Phenanthroline compounds and electroluminescent devices using the same
  Randomly Featured Patents
General packet radio service
Automatic vent valve
Device for fracturing material
Starter protection circuit
Sailing indicator
Magazine for calender rolls
Container for use as an aquarium or terrarium
Object detection system
Barbecue light
Financial products for incentivizing health improvement