Optical: systems and elements – Light interference – Produced by coating or lamina
Patent
1996-06-25
1998-03-10
Henry, Jon W.
Optical: systems and elements
Light interference
Produced by coating or lamina
359590, 359568, 359498, G02B 518, G02B 526, G02B 528, G02B 530
Patent
active
057268053
ABSTRACT:
An optical filter includes a dielectric layer formed within a resonant optical cavity, with the dielectric layer having formed therein a sub-wavelength periodic structure to define, at least in part, a wavelength for transmission of light through the resonant optical cavity. The sub-wavelength periodic structure can be formed either by removing material from the dielectric layer (e.g. by etching through an electron-beam defined mask), or by altering the composition of the layer (e.g. by ion implantation). Different portions of the dielectric layer can be patterned to form one or more optical interference filter elements having different light transmission wavelengths so that the optical filter can filter incident light according to wavelength and/or polarization. For some embodiments, the optical filter can include a detector element in optical alignment with each optical interference filter element to quantify or measure the filtered light for analysis thereof. The optical filter has applications to spectrometry, colorimetry, and chemical sensing.
REFERENCES:
patent: 3552826 (1971-01-01), Hanes
patent: 3699347 (1972-10-01), Buchan
patent: 3929398 (1975-12-01), Bates
patent: 4547074 (1985-10-01), Hinoda
patent: 4822998 (1989-04-01), Yokota
patent: 5038041 (1991-08-01), Egan
patent: 5120622 (1992-06-01), Hanrahan
patent: 5144498 (1992-09-01), Vincent
patent: 5175697 (1992-12-01), Kawagoe
patent: 5291332 (1994-03-01), Siebert
patent: 5293548 (1994-03-01), Siebert
patent: 5305233 (1994-04-01), Kawagoe
patent: 5602866 (1997-02-01), Fukunaga
D. C. Flanders, "Submicrometer Periodicity Gratings as Artificial Anisotropic Dielectrics," Applied Physics Letters, vol. 42, pp. 492-494, 15 Mar. 1983.
R. C. Enger and S. K. Case, "Optical Elements with Ultrahigh Spatial-Frequency Surface Corrugations," Applied Optics, vol. 22, pp. 3220-3228, 15 Oct. 1983.
Y. Ono, Y. Kimura, Y. Ohta, and N. Nishida, "Antireflection Effect in Ultrahigh Spatial-Frequency Holographic Relief Gratings," Applied Optics, vol. 26, pp. 1142-1146, 15 Mar. 1987.
N. F. Hartman and T. K. Gaylord, "Antireflection Gold Surface-Relief Gratings: Experimental Characteristics," Applied Optics, vol. 27, pp. 3738-3743, 1 Sep. 1988.
R. Magnusson and S. S. Wang, "New Principle for Optical Filters," Applied Physics Letters, vol. 61, pp. 1022-1024, 31 Aug. 1992.
D. H. Raguin and G. M. Morris, "Analysis of Antireflection-Structured Surfaces with Continuous One-Dimensional Surface Profiles," Applied Optics, vol. 32, pp. 2582-2598, 10 May 1993.
S. Kaushik and B. R. Stallard, "A Two Dimensional Array of Optical Interference Filters Produced by Lithographic Alterations of the Index of Refraction," Proceedings of SPIE--The International Society for Optical Engineering, vol. 2532, pp. 276-281, 10 Jul. 1995.
B. R. Stallard, M. J. Garcia, and S. Kaushik, "Near-IR Reflectance Spectroscopy for the Determination of Motor Oil Contamination in Sandy Loam," Applied Spectroscopy, vol. 50, pp. 334-338, Mar. 1996.
Kaushik Sumanth
Stallard Brian R.
Henry Jon W.
Hohimer John P.
Sandia Corporation
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