Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
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
Regenerative braking control to mitigate powertrain oscillation
Radiation-emitting semiconductor chip and method for producing a radiation-emitting semiconductor chip
Transferring a document
Identifying users of remote sessions
Electronic control apparatus
Circuit arrangement and method for operating a circuit arrangement
Terminal and method of controlling the same
  Randomly Featured Patents
Light emitting device with a porous alumina reflector made of aggregation of alumina particles
STI liner for SOI structure
Two-phase ferroelectric-ferromagnetic composite and carrier therefrom
Method for manufacturing 3-amino-2-cyclohexene-1-one, and a novel polymer ingredient and its preparation
Curing process for cationically photocurable formulations
Hydrophobic cross-linked gels for bioabsorbable drug carrier coatings
4-line CCD sensor and image input apparatus using the same
Use of discrete conductive layer in semiconductor device to re-route bonding wires for semiconductor device package
Silver halide color photographic light sensitive material
Encoder