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
Lamp body with integrally molded heat sink
Medicament delivery device and a method of medicament delivery
Metal halide lamps with fast run-up and methods of operating the same
X-ray imaging
Information-provision control method, information reproduction system, information-provision apparatus, information reproduction apparatus and information-presentation control program
Methods for integrating the production of cellulose nanofibrils with the production of cellulose nanocrystals
  Randomly Featured Patents
Mega-telecommunication and information system
Helmet face guard
Customer premises optical network unit and optical transmission system
Flexible printed circuit connector with an improved slider
Interface circuit for using a low voltage logic tester to test a high voltage IC
Subsea pressure compensation system
Amidoalkyl-8-azabicyclo[3.2.1]octane compounds as mu opioid receptor antagonists
Parts marking system and method
Golf grip training device
Peristaltically operating roller pump