Radiant energy – Photocells; circuits and apparatus – Optical or pre-photocell system
Patent
1997-08-20
1999-07-20
Le, Que T.
Radiant energy
Photocells; circuits and apparatus
Optical or pre-photocell system
356351, 422 681, G02F 101
Patent
active
059258780
ABSTRACT:
A method and apparatus for optically assaying a targeted substance in a sample using a diffraction anomaly grating sensor. The optical sensor has a diffraction grating coated with at least one dielectric layer such that the sensor is sensitized to interact with the targeted substance. Upon interaction, light incident upon the sensor at a particular angle propagates through the dielectric, thereby exhibiting a dip in zero-order reflectance. Advantages of the present invention include facilitating increased sensitivity while protecting the metal grating from tarnishing and degradation. The present invention also allows for the construction of sensors that are sensitized to a plurality of substances, thus eliminating the need for an operator to reconfigure the sensing system in order to assay different substances.
REFERENCES:
patent: 4828387 (1989-05-01), Sawyers
patent: 4877747 (1989-10-01), Stewart
patent: 4882288 (1989-11-01), North
patent: 4931384 (1990-06-01), Layton
patent: 4992385 (1991-02-01), Godfrey
patent: 5071248 (1991-12-01), Tiefenthaler
patent: 5118608 (1992-06-01), Layton
patent: 5310686 (1994-05-01), Sawyers
patent: 5365067 (1994-11-01), Cole et al.
patent: 5478755 (1995-12-01), Attridge
patent: 5479260 (1995-12-01), Fattinger
patent: 5492840 (1996-02-01), Malmqvist
patent: 5583643 (1996-12-01), Gass
patent: 5598267 (1997-01-01), Sambles
"Unusual splitting behavior of the dispersion of surface polaritons in grating of different symmetry, amplitude, and profile", Applied Optics, B. Fischer, vol. 34, No. 25, Sep. 1, 1995, pp. 5773-5779.
"A Compact Surface Plasmon Resonance Sensor for Measurement of Water in Process", Applied Spectroscopy, R. Matsubara, vol. 42, No. 8, 1988, pp. 1375-1379.
"Detection of Immuno-complex Formation via Surface Plasmon Resonance on Gold-Coated Diffraction Gratings", Biosensors, 3, 1987/88, D.C. Cullen, pp. 211-225, Jan. 1987.
"Grating-Coupled Surface Plasmon for Measuring the Refractive Index of a Liquid Sample", J. Phys. D: Applied Physics, Hiroshi Kano, vol. 34, 1995, pp. 331-335, Jan. 1995.
"Polaraisation Conversion Through the Excitation of Surface Plasmons on a Metallic Grating", Journal of Modern Optics, G. P. Bryan-Brown, 1990, vol. 37, No. 7, 1227-1232, Jan. 1990.
"Resonance Anomalies in the Light Intensity Reflected at Silver Gratings with Dielectric Coatings", J. Phys. D: Applied Physics, I. Pockrand, vol. 9, 1976, pp. 2423-2432, May 1976.
"Surface-Resonance Polarization Conversion Mediated By Broken Surface Symmetry", The American Pjysical Society, Physical Review B, S. J. Elston, vol. 44, No. 7, Aug. 15, 1991-I.
"Gas Detection By Means of Surface Plasmon Resonance", Sensors and Actuators, Claes Nylander, vol. 3, 1982-83, pp. 79-88, Jun. 1982.
"A Direct Surface Plasmon-Polariton Immunosensor: Preliminary Investigation of the Non-specific Adsorption of Serum Components to the Sensor Interface", Sensors and Actuators, D. C. Cullen, VI, 1990, pp. 576-579, Jan. 1990.
"Surface Plasmon Resonance on Gratings as a Novel Means for Gas Sensing", Sensors and Actuators, P. S. Vukusic, B, 8, 1992, pp. 155-160, Jan. 1992.
"Development of a Prototype Gas Sensor Using Surface Plasmon Resonance on Gratings", Sensors and Actuators, M. J. Jory, B, 17, 1994, pp. 203-209, Jan. 1994.
"Double Excitation of a Resonant Surface Plasmon Maximum", Journal of Modern Optics, M.J. Jory, 1993, vol. 40, No. 9, pp. 1657-1662, Jan. 1993.
"Optimization of a Chemooptical Surface Plasmon Resonance Based Sensor" Applied Optics, Jos van Gent, vol. 29, No. 19, Jul. 1, 1990.
"Choice of Metal and Wavelength for Surface-Plasmon Resonance Sensors: Some Considerations", Applied Optics, Helene E. DeBruijin, vol. 31, No. 4, Feb. 1992.
"Detection of Amine Gases by Color Changes of Acid-Base Indicators Supported on Inorganic Films", Reports of the Faculty of Engineering Nagasaki University, Yuji Takao, vol. 26, No. 46, Jan. 1996.
"Properties and Applications of Layered Grating Resonances", SPIE, Application and Theory of Periodic Structures, Diffraction Gratings and More PhenomenaIII, vol. 815, 1987, pp. 158-167, Jan. 1987.
"Vector Diffraction of a Grating and Conformal Thin Films", Optical Society of America, W. A. Challener, vol. 13, No. 9, Sep. 1996, pp. 1859-1869.
Imation Corp.
Le Que T.
Levinson Eric D.
LandOfFree
Diffraction anomaly sensor having grating coated with protective does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Diffraction anomaly sensor having grating coated with protective, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Diffraction anomaly sensor having grating coated with protective will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1323643