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| Number | Title | Issue Date |
| 7961396 | Diffractive optical system and optical device A diffractive optical system including a diffractive optical element has a concave lens component having a first diffractive optical surface, and an optical member having a second diffractive optical surface, the concave lens component and the optical member being a... | 06/14/2011 |
| 7961395 | Wideband diffraction limited optical receiver Systems and methods are provided for providing wideband diffraction limited performance in an optical receiver. A first lens is constructed from a first material and has a first surface and a second surface. A second lens is constructed from a second material and ha... | 06/14/2011 |
| 7420736 | Method for determining optimum grating parameters for producing a diffraction grating for a VUV spectrometer A method for determining a set of grating parameters for producing a diffraction grating for a vacuum-ultraviolet spectrometer, the parameters used being the small and large radius of the toroidal grating substrate, the two distances between the two holographic illu... | 09/02/2008 |
| 7369327 | Variable optical-property element and optical apparatus including the same A variable optical-property element includes a liquid crystal the pitch of twist is less than 60 times the wavelength of light used, so that a spatially uneven electric or magnetic field or temperature is applied to the liquid crystal to thereby form an index distri... | 05/06/2008 |
| 7339752 | Image pick-up lens system An image pick-up lens system from an object side to an image side includes an aperture stop (10), and a meniscus-shaped lens (20) having a concave surface on the object side and a convex surface on the image side. The lens has at least one aspheric sur... | 03/04/2008 |
| 7327663 | Recording reproducing optical system, objective lens, and aberration correcting optical element A recording reproducing optical system for an optical information recording medium is provided with a light source; an objective lens; and an aberration correcting optical element provided on an optical path between the light source and the objective lens. The objec... | 02/05/2008 |
| 7322700 | Image display apparatus An image display apparatus includes an indicating element which modulates or emits light as a pixel in accordance with image information. A displacement unit optically displaces a position of the pixel for each of two or more sub-fields constituting an image field c... | 01/29/2008 |
| 7324424 | Compatible optical pickup having diffractive device to correct chromatism and divergent lens to increase working distance A compatible optical pickup includes an optical disc, an objective lens, a diffractive device, and a divergent lens. The optical unit emits a short wavelength light beam corresponding to a high density optical disc and a long wavelength light beam corresponding to a... | 01/29/2008 |
| 7301702 | Diffractive optical element and optical system including the same A diffractive optical element includes a plurality of diffraction gratings. A diffraction grating within the plurality of diffraction gratings includes a plurality of grating parts having a curved grating surface and grating tips which connect to define a curved env... | 11/27/2007 |
| 7297386 | Antireflection structure An antireflection structure (10) comprises a base (1), and a finely roughened antireflection part (2) formed in a surface of the base (1). The finely roughened antireflection part (2) includes a plurality of projections and depress... | 11/20/2007 |
| 7295387 | Lens optical system A lens optical system is provided with a cemented lens element formed by cementing two constituent lens elements made of different optical materials together, with a diffractive optical surface formed at the cementing interface between the two constituent lens eleme... | 11/13/2007 |
| 7248667 | Illumination system with a grating element An illumination system, particularly for wavelengths ≦100 nm, with an object plane and a field plane, comprises a grating element and a physical diaphragm in a diaphragm plane, which is arranged downstream to the grating element in the beam path from the object pl... | 07/24/2007 |
| 7220021 | Compact color illumination device The present invention provides a compact color illumination device (100) for emitting collimated light. The illumination device comprises a reflector cup (102), a blazed diffraction grating (108) formed on the inner surface of the reflector cup,... | 05/22/2007 |
| 7184616 | Method and apparatus for fiber Bragg grating production Fiber Bragg writing devices comprising solid state lasers are provided. The solid state lasers comprise optical parametric oscillators and emit moderate peak-power output beams at wavelengths which are suitable for efficient production of fiber Bragg gratings withou... | 02/27/2007 |
| 7181106 | Optical fiber capped at end with diffractive film, and manufacturing method therefor Affords efficiently and at low cost optical fibers capped at the end with a working, tiny optically diffractive film. An optical fiber includes a diffractive film formed onto an endface thereof, or onto the endface of a collimator joined to the endface of the fiber;... | 02/20/2007 |
| 7161729 | Array of micromirror array lenses An array of micromirror array lenses is invented. The micromirror array lens consists of many micromirrors and actuating components. Each micromirror array lens is variable focal length lens with high speed focal length change. The lens can have arbitrary type and/o... | 01/09/2007 |
| 7125121 | Image display apparatus An image display apparatus includes an indicating element which modulates or emits light as a pixel in accordance with image information. A displacement unit optically displaces a position of the pixel for each of two or more sub-fields constituting an image field c... | 10/24/2006 |
| 7123422 | Zoom lens system To provide a zoom lens system having high optical performance by using a diffractive optical element, the system includes a first group having positive power, a second group having negative power, and a third group having positive power. When zooming from a wide-ang... | 10/17/2006 |
| 7113336 | Microlens including wire-grid polarizer and methods of manufacture Microlenses including wire-grid polarizers and methods for their manufacture are disclosed. The method involves forming wire-grid polarizer patterns on a surface of the microlens. The devices and methods provide simple and economical microlenses with polarizers.... | 09/26/2006 |
| 7092144 | Mirror assemblies incorporating variable index of refraction materials A mirror assembly including an active lens and a reflective surface. The mirror assembly may change its refractive index when a voltage is applied to the active lens, thereby changing the field of view in the lens. Exemplary applications include a blind spot system ... | 08/15/2006 |
| 7050236 | Diffractive optical element and optical pickup apparatus The present invention relates to a diffractive optical element which has chromatic aberration capable of recording and reproducing without any problem even in the case of instantaneous wavelength change in a laser beam that cannot be followed by an actuator, and can... | 05/23/2006 |
| 7035022 | Observation optical system and optical apparatus An observation optical system is disclosed with which the Fresnel reflection at the surfaces of optical members can be reduced, the transmittance can be improved, and the surface reflection ghost that occur among a plurality of optical surfaces can be suppressed. Th... | 04/25/2006 |
| 7018745 | Controlled phase delay between beams for writing bragg gratings A method of writing an extended grating structure in a photosensitive waveguide comprising the steps of utilizing at least two overlapping beams of light to form an interference pattern, moving the waveguide through said overlapping beams, simultaneously controlling... | 03/28/2006 |
| 6993221 | Bragg grating and method of producing a bragg grating using an ultrafast laser A novel method and apparatus for varying the index of refraction of a material using an interference pattern is disclosed. The method and apparatus incorporate an ultra short duration pulse laser source. Electromagnetic radiation provided from the laser propagates t... | 01/31/2006 |
| RE38943 | Compound objective lens for optical disks having different thicknesses A compound objective lens is composed of a hologram lens or transmitting a part of incident light without any diffraction to form a beam of transmitted light and diffracting a remaining part of the incident light to form a beam of first-order diffracted light, and a... | 01/24/2006 |
| 6951715 | Optical detection of label-free biomolecular interactions using microreplicated plastic sensor elements Methods and compositions are provided for detecting biomolecular interactions. The use of labels is not required and the methods can be performed in a high-throughput manner. The invention also provides optical devices useful as narrow band filters. ... | 10/04/2005 |
| 6940650 | Diffraction optical element and transfer mold therefor A diffraction optical element including an element body having a large number of grooves formed on its surface to form a grating, and a grating shape adjusting layer deposited on a grating surface of the element body by oblique incidence or material particles onto t... | 09/06/2005 |
| 6937397 | Diffractive optical element and optical system having the same Disclosed is a diffractive optical element which includes a plurality of diffraction gratings being made of materials having different dispersions and being formed in accumulation, wherein at least one of the diffraction gratings has a varying grating thickness.... | 08/30/2005 |
| 6934459 | Reel to reel manufacturing line The invention relates to a line for processing an optical fiber having first and second ends, the line comprising a support for receiving a reel with the fiber wounded thereon; a de-winder for unwinding the fiber without substantial rotation of the reel; and a proce... | 08/23/2005 |
| 6915044 | Tunable talbot interferometers for fiber bragg grating writing A tunable interferometer for creating gratings of variable periodicity in an optical waveguide is disclosed. The interferometer includes a beam splitter for producing first and second write beams from an input beam. First and second reflectors receive the first and ... | 07/05/2005 |
| 6904201 | Phase-controlled fiber Bragg gratings and manufacturing methods A fiber Bragg grating may be written at an arbitrary wavelength without extensive recalibration or reconfiguration of the writing equipment in some embodiments. A pair of writing beams may be used to expose the fiber. The crossing angles of the writing beams may be ... | 06/07/2005 |
| 6904202 | Writing waveguides with an arbitrary Bragg wavelength A Bragg grating may be written at an arbitrary wavelength without extensive recalibration or reconfiguration of the writing equipment in some embodiments. A pair of writing beams may be used to expose a waveguide. The crossing angles of the writing beams may be adju... | 06/07/2005 |
| 6894837 | Imaging system for an extreme ultraviolet (EUV) beam-based microscope Imaging system for a microscope based on extreme ultraviolet (EUV) radiation. The present invention is directed to a reflective imaging system for an x-ray microscope for examining and object in an object plane, wherein the object is illuminated by rays of a wavelen... | 05/17/2005 |
| 6873463 | Diffractive optical element and optical system having the same Disclosed is a diffractive optical element which is made of at least two materials of different dispersions and which includes at least two diffraction gratings being accumulated one upon another, wherein each diffraction grating is formed on a curved surface of a s... | 03/29/2005 |
| 6829093 | Diffraction optical element A diffraction optical element wherein a plurality of diffraction gratings formed of at least two kinds of materials differing in dispersion are laminated, at least two of the plurality of diffraction gratings are formed on a curved surface and adjacent to each other... | 12/07/2004 |
| 6825979 | Optical system having a diffractive optical element, and optical apparatus An optical system includes a diffractive optical element having a diffraction grating provided, on a lens surface having a curvature, in a concentric-circles shape rotationally-symmetrical with respect to an optical axis. The sign of the curvature of the lens surfac... | 11/30/2004 |
| 6813079 | Fabricating optical waveguide gratings A method of fabricating an optical waveguide grating having a plurality of grating lines of refractive index variation comprises the steps of: (i) repeatedly exposing a spatially periodic writing pattern onto a photosensitive optical waveguide: and (ii) moving the w... | 11/02/2004 |
| 6791754 | Optical system having a diffractive optical element, and optical apparatus An optical system includes a diffractive optical element having a diffraction grating provided, on a lens surface having a curvature, in a concentric-circles shape rotationally-symmetrical with respect to an optical axis. The sign of the curvature of the lens surfac... | 09/14/2004 |
| 6763186 | Zoom lens, and camera incorporating such zoom lens Disclosed is a zoom lens system which uses a diffractive optical element such that high optical performance can be obtained over the overall power variation range. The zoom lens system includes a first lens unit having positive optical power, and a second lens unit ... | 07/13/2004 |
| 6757103 | Zoom lens and optical equipment using the same A zoom lens includes a first lens unit having a positive optical power, a second lens unit having a negative optical power, a third lens unit having a positive optical power, and a fourth lens unit having a negative optical power in sequence from an object side. The... | 06/29/2004 |
