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Frederic Taugwalder Phones & Addresses

  • Altadena, CA
  • Pasadena, CA
  • 2440 El Molino Ave, Altadena, CA 91001

Publications

Us Patents

Sub Miniaturized Laser Doppler Velocimeter Sensor

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US Patent:
6608668, Aug 19, 2003
Filed:
Aug 6, 2001
Appl. No.:
09/682208
Inventors:
Morteza Gharib - Pasadena CA
Darius Modaress - Pasadena CA
Frederic Taugwalder - Pasadena CA
Assignee:
California Institute of Technology - Pasadena CA
International Classification:
G01P 336
US Classification:
356 28, 356 285
Abstract:
A miniaturized laser Doppler velocimeter is formed in a housing that is preferably 3 mm in diameter or less. A laser couples light to a first diffractive optical element that is formed on the fiber end. The light is coupled to a lens that also includes a diffractive optical element. The same lens is also used to collect receive light, and receives includes another diffractive optical element to collect that received light.

Diffractive Optical Fluid Shear Stress Sensor

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US Patent:
6717172, Apr 6, 2004
Filed:
Dec 18, 2001
Appl. No.:
10/025218
Inventors:
Morteza Gharib - San Marino CA
Daniel W. Wilson - Glendale CA
Siamak Forouhar - Carlsbad CA
Richard E. Muller - Altadena CA
Dominique Fourguette - Pasadena CA
Darius Modarress - Pasadena CA
Frederic Taugwalder - Pasadena CA
Assignee:
California Institute of Technology - Pasadena CA
International Classification:
G01N 2149
US Classification:
250574, 356 28, 356441, 73861
Abstract:
A diffractive optic sheer stress sensor operates by forming diverging fringes over a linear area of measurement. A diode laser focuses light onto a diffractive lens which focuses the light to respective slits. The slits form diverging fringes, and scattered light from the fringes is collected by a window and focused by another diffractive lens to a receiver.

Integrated Particles Sensor Formed On Single Substrate Using Fringes Formed By Diffractive Elements

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US Patent:
6956230, Oct 18, 2005
Filed:
Sep 15, 2000
Appl. No.:
09/838344
Inventors:
Morteza Gharib - San Marino CA,
Dominique Fourguette - Los Angeles CA,
Darius Modarress - Los Angeles CA,
Frederic Taugwalder - Altadena CA,
Siamak Forouhar - Pasadena CA,
Assignee:
California Institute of Technology - Pasadena CA
International Classification:
G01N021/49
US Classification:
250574, 356336, 356441, 738655, 73705
Abstract:
Integrated sensors are described using lasers on substrates. In one embodiment, a first sensor forms a laser beam and uses a quartz substrate to sense particle motion by interference of the particles with a diffraction beam caused by a laser beam. A second sensor uses gradings to produce an interference. In another embodiment, an integrated sensor includes a laser element, producing a diverging beam, and a single substrate which includes a first diffractive optical element placed to receive the diverging beam and produce a fringe based thereon, a scattering element which scatters said fringe beam based on particles being detected, and a second diffractive element receiving scattered light.

Particle Sizing And Concentration Sensor Using A Hollow Shaped Beam

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US Patent:
2002011, Aug 22, 2002
Filed:
Dec 4, 2001
Appl. No.:
10/006932
Inventors:
Morteza Gharib - San Marino CA,
Dominique Fourguette - Los Angeles CA,
Frederic Taugwalder - Altadena CA,
Daniel Wilson - Montrose CA,
Darius Modarress - Los Angeles CA,
International Classification:
G01N015/02
US Classification:
356/336000
Abstract:
An optical particle detection system produces an optical beam which is scattered by particles in a probe volume area. The particles may scatter the beam to the detector. The optical beam is a hollow shaped beam which may be circular/doughnut shaped, or made be of any other hollow shape. The particle passes across the beam, and those particles which pass through the center of the beam are detected as being desired particles to detect. This system may be used to detect particle concentration, and size. In addition, by producing an asymmetric beam, particle direction can also be detected.
Frederic Taugwalder from Altadena, CA, age ~52 Get Report