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
Process for making thermoplastic polymer pellets
Light-reflective anisotropic conductive paste and light-emitting device
Device and method for generating soft tissue contrast images
Method and CTDevice for computer tomographic spiral scanning of a patient
VGPU: a real time GPU emulator
Control strategies for a multi-mode drive system
  Randomly Featured Patents
Increased capacity sulfur recovery plant and process for recovering elemental sulfur
Automated microbiological testing apparatus and method
Multi-colored airbrush attachment system having a spiral mixing chamber and a wrist/arm-mounted paint reservoir
Semiconductor device with integrated circuit electrically connected to a MEMS sensor by a through-electrode
Anti-arrythmic sulphonamide compositions
Method for making, parallel preprogramming or field programming of electronic matrix arrays
Dynamic range extension of wideband receiver
Horizontal cutter of double-bodied bottles attached to each other at the neck
Combination battery charger and tester
Apparatus for controlling the diameter of cigarettes to be manufactured by means of a cigarette production machine