Class / Patent application number | Description | Number of patent applications / Date published |
359568000 | For diffractive subtractive filtering | 20 |
20080259455 | Nano-structured zero-order diffractive filter - A zero order diffractive filter for polarised or unpolarised polychromatic light, comprises a grating line ( | 10-23-2008 |
20080278815 | ISOTROPIC ZERO-ORDER DIFFRACTIVE FILTER - The present invention relates to an isotropic zero-order diffractive colour filter, to a method to manufacture an embossing tool and to a method to manufacture such a filter. | 11-13-2008 |
20080316600 | WAVELENGTH-SELECTIVE DIFFRACTION ELEMENT AND OPTICAL HEAD DEVICE INCORPORATING THE SAME - The present invention provides a wavelength-selective diffraction element, configured such that light having a plurality of wavelengths are incident thereon as incident light, which is provided with: a transparent substrate; a concavo-convex part, formed on the transparent substrate such that concave portions and convex portions are cyclically extended in one direction, and comprised of a first material which is optically isotropic; and a filling part, filling at least the concave portions and comprised of a second material which is optically isotropic. The first material and the second material have no absorbance with respect to the wavelengths of the incident light. The first material and the second material have an identical refractive index with respect to light having a first wavelength which is at least one of the wavelengths of the incident light. The first material and the second material have different refractive indices with respect to light having a second wavelength which is at least one of the wavelengths of the incident light and different from the first wavelength. | 12-25-2008 |
20090097120 | TUNABLE FILTER - A light is incident on a refractive diffraction grating | 04-16-2009 |
20090257126 | ZERO-ORDER DIFFRACTIVE PIGMENTS - The present invention relates to pigments comprising or consisting of a layer made of a material with an index of refraction that is higher than the index of refraction of the adjacent material by at least 0.25; whereas said layer has a zero-order diffractive micro-structure; whereas said layer acts as an optical waveguide and whereas said layer has a thickness between 50 nm and 500 nm; to processes for its manufacture and to its use. These pigments show a colour effect upon rotation and/or tilting, and it is believed that this colour effect is based on zero-order diffraction. | 10-15-2009 |
20100091369 | DOUBLE-LAYER GRATING - A double-layer grating structure for efficient retroreflection of incident radiation and efficient transmission of the undiffracted incident radiation is disclosed. The grating is constructed of two spaced-apart layers of periodically arranged metal stripes, wherein the stripes in one layer overlap with gaps between the stripes in the second layer. The layers are encapsulated with a dielectric material. A method for producing such grating is also described. | 04-15-2010 |
20100110546 | PHOTONICS DEVICE - Provided is a photonics device. The photonics device includes a distribution Bragg reflector (DBR), first and second waveguides disposed at both sides of the DBR, first lenses disposed between the DBR and the first waveguides, and second lenses disposed between the DBR and the second waveguides. | 05-06-2010 |
20100202055 | DIFFRACTION ORDER SORTING FILTER FOR OPTICAL METROLOGY - A zoned order sorting filter for a spectrometer in a semiconductor metrology system is disclosed with reduced light dispersion at the zone joints. The order sorting filter comprises optically-transparent layers deposited underneath, or on top of thin-film filter stacks of the order sorting filter zones, wherein the thicknesses of the optically-transparent layers are adjusted such that the total optical lengths traversed by light at a zone joint are substantially equal in zones adjacent the zone joint. A method for wavelength to detector array pixel location calibration of spectrometers is also disclosed, capable of accurately representing the highly localized nonlinearities of the calibration curve in the vicinity of zone joints of an order sorting filter. | 08-12-2010 |
20100309554 | COLOR SEPARATION MICROLENS AND COLOR SEPARATION GRATING - Color separation gratings, color separation microlenses and imaging arrays are provided. A color separation grating includes a transparent grating material having a grating formed therein. The transparent grating material has a first surface configured to receive incident light and a second surface opposite the first surface. The second surface is configured to pass selective separated colors from the incident light corresponding to different diffraction orders. The grating is formed in the first surface and includes a number of steps in a grating period and a number of sub-steps formed on each step. A combination of the number of steps and the number of sub-steps are selected to correspond to a number of diffraction orders produced by the color separation grating. | 12-09-2010 |
20100315713 | ZERO-ORDER DIFFRACTIVE FILTER AND METHOD FOR MANUFACTURING THEREOF - The present invention discloses a method for manufacturing a zero-order diffractive filter comprising a high-index material having an upper surface and a lower surface. The high-index material is positioned between a first low-index matter and a second low-index matter; the lower surface is adjacent to said first low-index matter and the upper surface is adjacent to the second low-index matter. Moreover, the high-index material has an index of refraction that is higher than the index of refraction of both said first low-index matter and said second low-index matter. The method comprises at least the following procedure: selectively providing, by employing at least one wet-coating technique, at least one of the following at least partially: the high-index material onto said first low-index matter. | 12-16-2010 |
20100328774 | RESONANT REFLECTIVE FILTER AND BIOSENSOR INCLUDING THE SAME - Provided is a resonant reflective filter including a substrate and a grating layer, wherein the substrate is formed of a material having a lower reflective index than that of a material forming the grating layer. Thus, the resonant reflective filter can form a resonant spectrum having good symmetry and a sharp shape. Accordingly, the resonant reflective filter can have improved sensitivity and can be applied to optical systems that require a small linewidth. | 12-30-2010 |
20110096399 | TUNABLE FILTER - A tunable filter is provided. The tunable filter comprises an input optical fiber for launching an optical signal into the tunable filter; a collimator disposed for collimating light transmitted from the input optical fiber; a grating disposed for dispersing the collimated light according to wavelength in a dispersion plane; a first reflector disposed for reflecting at least a partial of the dispersed light to a second reflector; a second reflector disposed for reflecting the dispersed light back to the grating; a third reflector disposed for reflecting the transmitted dispersed light from the grating back to the grating, wherein then the second reflector reflects the transmitted dispersed light to the first reflector, the first reflector reflects the transmitted dispersed light back to the grating, the collimator receives the transmitted dispersed light from the grating and substantially focusing it to a focal point; and an output optical fiber disposed at the focal point for receiving the focused light; wherein one of the reflectors is rotated to selectively reflect the dispersed light having a predetermined wavelength. | 04-28-2011 |
20110317268 | ZERO-ORDER DIFFRACTIVE PIGMENTS - The present invention relates to pigments comprising or consisting of a layer made of a material with an index of refraction that is higher than the index of refraction of the adjacent material by at least 0.25; whereas said layer has a zero-order diffractive micro-structure; whereas said layer acts as an optical waveguide and whereas said layer has a thickness between 50 nm and 500 nm; to processes for its manufacture and to its use. These pigments show a colour effect upon rotation and/or tilting, and it is believed that this colour effect is based on zero-order diffraction. | 12-29-2011 |
20120147471 | V-SHAPED RESONATORS FOR ADDITION OF BROAD-AREA LASER DIODE ARRAYS - A system and method for addition of broad-area semiconductor laser diode arrays are described. The system can include an array of laser diodes, a V-shaped external cavity, and grating systems to provide feedback for phase-locking of the laser diode array. A V-shaped mirror used to couple the laser diode emissions along two optical paths can be a V-shaped prism mirror, a V-shaped stepped mirror or include multiple V-shaped micro-mirrors. The V-shaped external cavity can be a ring cavity. The system can include an external injection laser to further improve coherence and phase-locking. | 06-14-2012 |
20120243095 | CONFIGURABLE MICROMECHANICAL DIFFRACTIVE ELEMENT WITH ANTI STICTION BUMPS - The invention relates to a micromechanical unit, in particular, an adjustable optical filter, and also a method to manufacture the unit. The unit comprises a first device layer and a second substrate layer at least partially fastened to each other, where the device layer comprises a number of reflecting elements divided between a number of non movable, fixed reflecting elements, where the fixed elements are connected with the substrate, and where a cavity is defined between the substrate and each movable element and each movable element is set up to produce a spring-loaded movement into the cavity, and where a number of dielectric spacer blocks are placed in the cavities between each movable element and the substrate to avoid electric contact between them. | 09-27-2012 |
20140071532 | COLOR FILTER - The present invention discloses a color filter includes a substrate layer and a medium grating layer, wherein the medium grating layer, arranged on the substrate layer, has a grating structure of periodic arrangement. The color filter is characterized in that: the medium grating layer is provided with a metal profiling film, which covers the ridge portion of the grating structure, one or two sides of the lateral portion of the grating structure, and a part of the groove portion of the grating structure, with the area of the groove portion of the grating structure covered by the metal profiling film occupying 30%-95% of the total area of the lateral portion and the groove portion. By providing the metal profiling film, this invention can break the condition of the original metal surface plasmon resonance, and reduce influence of the incident angle of light on the resonance condition, thus achieving the filtering effect within a relatively wide range of angle. | 03-13-2014 |
20140085725 | Two-Dimensionally Periodic, Color-Filtering Grating - A two-dimensionally periodic, color-filtering grating has a contiguous high-refractive. In an embodiment, the color-filtering grating includes a metallic ground layer defining a grating plane and above the ground layer a two-dimensionally regular pattern of individual high-refractive, such as metallic areal elements that respectively extend parallel to the grating plane and respectively are spaced apart from the ground layer through an intermediate dielectric by a distance that is greater than the thickness of the ground layer and of the areal elements. The regular pattern has in at least two directions, which run parallel to the grating plane, a periodicity between 100 nm and 800 nm, and preferably between 200 nm and 500 nm. | 03-27-2014 |
20150036217 | OPTICAL FILTER - An optical filter configured to transmit light of a predetermined wavelength includes a substrate; a first conductive thin film that is disposed on the substrate and has apertures extending through the first conductive thin film and arranged with a period of less than the predetermined wavelength; and a second conductive thin film at least a portion of which faces the apertures so as to be separated from the apertures. | 02-05-2015 |
20160107471 | NANOSTRUCTURE ARRAY DIFFRACTIVE OPTICS FOR RGB AND CMYK COLOR DISPLAYS - An RGB and/or CMYK full color optical display device comprising multiple nanostructure arrays configured to provide display of a wide range of colors corresponding to multiple pixels or sub-regions of an image is disclosed, where the multiple nanostructure arrays may be formed on a single substrate layer. An optical display device includes a substrate having a surface, and a first pixel of a color image comprising first and second sub-pixels according to at least one of an additive and subtractive color scheme, where the first sub-pixel comprises a first optical sub-wavelength nanostructure array formed on or in the surface of the substrate, and where the second sub-pixel comprises a second optical sub-wavelength nanostructure array formed on or in the surface of the substrate. A method of manufacturing an RGB and/or CMYK full color optical display comprising multiple nanostructure arrays arranged as sub-pixels according to a color scheme is also disclosed. | 04-21-2016 |
20160131921 | LASER OSCILLATION MECHANISM - A laser oscillation mechanism includes a pulse laser oscillator configured to oscillate a pulse laser beam, and a branching unit which branches the pulse laser beam oscillated by the pulse laser oscillator. The branching unit includes a diffraction optical element and a volume Bragg grating. The diffraction optical element branches the pulse laser beam oscillated by the pulse laser oscillator into a plurality of laser beams in an effective region. The volume Bragg grating refracts, from among the pulse laser beams branched by the diffraction optical element, a particular pulse laser beam to be excluded from the effective region to exclude the particular pulse laser beam. | 05-12-2016 |