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| Number | Title | Issue Date |
| 7864428 | Optical recognition device and optical recognition display comprising the same An optical recognition device is provided. The optical recognition device includes a transparent substrate, a patterned infrared reflective film formed thereon, and an infrared anti-reflective film sheltering a gap in a recognition pattern of the patterned infrared ... | 01/04/2011 |
| 7428102 | Optical element An optical element which includes an optical block having a cavity part formed on an optical path and an inclined face formed in an internal face of the cavity part at a prescribed inclining angle with respect to a traveling direction of light. Multilayer films of t... | 09/23/2008 |
| 7405872 | System and method for filtering electromagnetic transmissions A combination of filters for filtering selected wavelengths of electromagnetic radiation is provided on a transparent substrate such as a plastic film or glazing of a window. The combination of filters prevents or attenuates the passage of wavelengths through the su... | 07/29/2008 |
| 7394986 | Flat top optical filtering component The invention relates to wavelength-selective optical filters for allowing light of a narrow optical spectral band, centered around a wavelength (λc) to pass through them, while reflecting the wavelengths lying outside this band. According to the inventi... | 07/01/2008 |
| 7373028 | Polarization maintaining coupler A polarization maintaining coupler is provided that allows a user to change the coupling ratio of two or more output fibers. The coupler can include an assembly containing a PM fiber in a ferrule. The ferrule is attached to a housing, which includes a lens for colli... | 05/13/2008 |
| 7355792 | CWDM filter for eliminating noise A CWDM filter of the present invention comprises a substrate; a first portion formed on the substrate having at least two first stacking structures; a second portion superposed on the first portion including at least two second stacking structures; and a first match... | 04/08/2008 |
| 7351470 | Removable antireflection film An antireflection film and method of making same includes a substrate having a first surface and a second surface, an inorganic layer deposited on the first surface of the substrate, and an optically active polymer layer formed by curing a curable composition in sit... | 04/01/2008 |
| 7295368 | System and methods for filtering electromagnetic visual, and minimizing acoustic transmissions A combination of filters for filtering selected wavelengths of electromagnetic radiation is provided on a transparent substrate such as a plastic film or glazing of a window. The combination of filters prevents or attenuates the passage of wavelengths through the su... | 11/13/2007 |
| 7254294 | Dispersion compensating filters A filter device provides for the modification of the group delay of an optical signal without attenuation of adjacent optical signals in a WDM optical communication systems. The filters devices may be combined and used in various methods to modify the GD and dispers... | 08/07/2007 |
| 7252733 | Polarizer guarded cover sheet with adhesion promoter The invention generally relates to polymer films used as protective cover sheets for polarizer plates, a method for producing polarizing plates, and a Liquid Crystal Display employing the same. More particularly, the invention relates to a cover sheet composite havi... | 08/07/2007 |
| 7224528 | Optically variable security devices A security article includes a light transmissive substrate having a first surface and an opposing second surface, with the first surface having an optical interference pattern such as a holographic image pattern or an optical diffraction pattern thereon. A color shi... | 05/29/2007 |
| 7209608 | Wavelength tunable optical filter Provided is a Fabry-Perot type wavelength tunable optical filter, comprising a first mirror; a second mirror located over the first mirror; a driving body located over the first mirror, and having both ends fixed to the first mirror through a spacer; a plurality of ... | 04/24/2007 |
| 7199928 | Optical element, optical drop module, optical add-drop module, and tunable light source An optical element has a structure in that a first mirror stack layer is formed on a substrate. A first transparent conductive film, a conductive buffer layer, a spacer layer having a primary or secondary electrooptic effect, a conductive buffer layer and a second t... | 04/03/2007 |
| 7194160 | Filter module A filter module includes a first optical fiber collimator, a second optical fiber collimator, and a filter located between the first and second optical fiber collimators. The first optical fiber collimator includes a first optical fiber, a first optical fiber chip f... | 03/20/2007 |
| 7177075 | System and methods for filtering electromagnetic visual, and minimizing acoustic transmissions A combination of filters for filtering selected wavelengths of electromagnetic radiation is provided on a transparent substrate such as a plastic film or glazing of a window. The combination of filters prevents or attenuates the passage of wavelengths through the su... | 02/13/2007 |
| 7170683 | Reflection element of exposure light and production method therefor, mask, exposure system, and production method of semiconductor device A reflector for extreme ultraviolet light, its manufacture method, a phase shift mask, an exposure apparatus and a semiconductor manufacture method, capable of making the wavelength dependency of a reflectance via a plurality of reflection surfaces be coincident wit... | 01/30/2007 |
| 7167612 | Wavelength tunable filter capable of being bidirectionally driven by electromagnetic forces A wavelength tunable filter capable of being driven such that reflecting mirrors move more distant as well as closer by using the principle that a direction of the electromagnetic forces changes depending on the direction of the current flowing perpendicular to the ... | 01/23/2007 |
| 7166797 | Tandem filters using frequency selective surfaces for enhanced conversion efficiency in a thermophotovoltaic energy conversion system This invention relates to the field of thermophotovoltaic (TPV) direct energy conversion. In particular, TPV systems use filters to minimize parasitic absorption of below bandgap energy. This invention constitutes a novel combination of front surface filters to incr... | 01/23/2007 |
| 7119960 | Method of making high performance optical edge and laser-line filters and resulting products High performance optical edge and laser-line filters and methods of making the same are disclosed. The optical edge filters have an edge steepness greater than about 0.8% as measured by dividing (a) the edge width from the 50% transmission wavelength to the optical ... | 10/10/2006 |
| 7092162 | Bandwidth enhancement device An optical cavity is combined with a MUX or a de-MUX device having substantially the same free-spectral range in order to enhance the bandwidth of the device. The optical cavity can be tuned to shift the frequencies of maximum insertion loss to match the center freq... | 08/15/2006 |
| 7046320 | Optical element and surface light source device using the same, as well as liquid crystal display An optical element 11 includes a bandpass filter made of a lamination of thin films respectively having different refraction factors so as to selectively allow light emitted from a backlight 6 to pass therethrough, and a polarizer 3, a quarter-w... | 05/16/2006 |
| 7038361 | Plasma display panel structure having polarization plate A plasma display panel structure having polarization plate is comprised of plasma display panel and filter, wherein the plasma display panel includes front glass and rear glass. Through the front glass, the plasma display panel displays images to the outside. The lo... | 05/02/2006 |
| 7012747 | Polarizing beam splitter and polarizer using the same There are provided an inexpensive polarizing beam splitter having a polarized light beam separating function of a wide range with a simple film construction and a reduced number of laminated film layers, and a polarizer provided with the polarizing beam splitter to ... | 03/14/2006 |
| 7004391 | Optical gain correction filter and optical apparatus having the same The present invention provides an optical apparatus comprising an optical gain correction filter having a multilayer film structure formed by stacking a plurality of thin films with different diffractive indexes on a light transmitting board, wherein when the light ... | 02/28/2006 |
| 6961496 | Optical package with cascaded filtering An optical package comprises an optical element (e.g., a filter), a reflective surface, an input optical fiber and an output optical fiber. A light signal travels through the input fiber and through the element where it is shaped or modified a first time. The shaped... | 11/01/2005 |
| 6954294 | Tunable filter, manufacturing method thereof and optical switching device comprising the tunable filter The invention provides a tunable filter that can minimize adjacent channel cross talk despite an increase of a number of available wavelengths and quickly switch a wavelength to be used, and manufacturing method thereof, and also an optical switching device comprisi... | 10/11/2005 |
| 6918673 | Protective optical filter assembly A protective optical filter assembly for thin film filters having two transparent substrates facing one another and separated by a resilient element, a sealed region is formed between the transparent substrates by applying a compressive force that compresses the res... | 07/19/2005 |
| 6885504 | Method for the design and fabrication of complementary optical comb filter pairs A complementary comb filter pair, and method for making same, are described, wherein each comb filter element of the complementary pair can be fabricated during the same deposition run. The complementary comb filter is masked so as to retard the thin film growth of ... | 04/26/2005 |
| 6873464 | Multilayer mirror A multilayer mirror (1), in particular a multilayer dispersive mirror, comprising several individual layers (2, 3) of different properities applied to a substrate (4; 14) and following each other via parallel, plane interfaces (6), and a ... | 03/29/2005 |
| 6859320 | Dispersion compensation using resonant cavities Multi-stage, all-pass optical filters used to make low-loss, multi-channel dispersion compensation modules are disclosed. The all-pass optical filters can be ring resonators in waveguides, Gires-Tournois Interferometers (GTIs) in free space form, and the like. The c... | 02/22/2005 |
| 6844977 | Multi-channel optical filter An exemplary embodiment of the invention is an optical filter including a mirror including a plurality of first dielectric layers having a first index of refraction and a plurality of second dielectric layers having a second index of refraction. A plurality of the f... | 01/18/2005 |
| 6833957 | Tunable filter, manufacturing method thereof and optical switching device comprising the tunable filter The invention provides a tunable filter that can minimize adjacent channel cross talk despite an increase of a number of available wavelengths and quickly switch a wavelength to be used, and manufacturing method thereof, and also an optical switching device comprisi... | 12/21/2004 |
| 6797366 | Color shifting film articles Multilayer polymeric films and other optical bodies are provided which is useful in making colored mirrors and polarizers. The films are characterized by a change in color as a function of viewing angle. ... | 09/28/2004 |
| 6768581 | Coated lens exhibiting substantially balanced reflectance A coated optical lens includes a lens element and a coating on the surface of the lens element. The coating exhibits a substantially balanced reflectance from the center to a radius proximate the edge of the lens element. The term “substantially balanced reflectan... | 07/27/2004 |
| 6728038 | Low chromatic dispersion filter for WDM A narrow bandpass optical filter for use in a WDM communication minimizes the system bit rate error by providing a sufficiently broad passband with respect to the data transfer rate yet has a low group delay across the passband. The passband shape is optimized to ha... | 04/27/2004 |
| 6692129 | Display apparatus including RGB color combiner and 1D light valve relay including schlieren filter The optical system includes a plurality of light modulators, one or more combining filters, and an optical relay system including a filter. Each light modulator modulates a corresponding incident light beam. The one or more combining filters superimpose t... | 02/17/2004 |
| 6666944 | Method of manufacturing optical filter The present invention has an object to provide a manufacturing method of readily realizing an optical filter having a flat transmission characteristic and a superior cutoff characteristic relative to adjacent bands. To this end, with the manufacturing met... | 12/23/2003 |
| 6631033 | Multilayer optical filters Optical filters (1) designed in pairs, which are essentially colourless in their individual general appearance designed to take on a strong coloration when viewed together in transmission, said filters being particularly, useful for identification of coun... | 10/07/2003 |
| 6618199 | Dual-band fabry-perot mirror coating A Fabry-Perot filter has at least two mirror structures defining a resonant cavity. This filter is tunable by modulating an optical distance between the mirror structures. To accommodate a wide bandwidth of operation or accommodate two spectral bands, the... | 09/09/2003 |
| 6611378 | Thin-film interference filter with quarter-wavelength unit sub-layers arranged in a generalized pattern Thin-film interference filters are constructed with a generalized pattern of layers differing in both thickness and refractive index to produce spectral responses appropriate for adjusting optical power among a plurality of different wavelength channels. ... | 08/26/2003 |
