Radiant energy – Photocells; circuits and apparatus – Optical or pre-photocell system
Reexamination Certificate
2005-10-18
2005-10-18
Patidar, Jay (Department: 2862)
Radiant energy
Photocells; circuits and apparatus
Optical or pre-photocell system
C356S336000, C356S441000, C073S865500, C073S705000
Reexamination Certificate
active
06956230
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.
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Forouhar Siamak
Fourguette Dominique
Gharib Morteza
Modarress Darius
Taugwalder Frederic
California Institute of Technology
Patidar Jay
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