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| Number | Title | Issue Date |
| 8184386 | Fresnel lens and injection mold A surface of a base material of a Fresnel lens has a central area having circular zones arranged therein and an outer area located on the outer side of the central area and having circular-arc zones arranged therein. The pitch of zones in a boundary area between the... | 05/22/2012 |
| 8159761 | Optical concentrator Apparatus for concentrating light rays arriving from at least one external source onto a receiver, individual beams of the light rays each arriving at the apparatus substantially collimated, the apparatus including a respective Fresnel lens assembly for each of a pl... | 04/17/2012 |
| 8139295 | Optical system and eye piece An eye piece (EL1) is formed having a first lens (L1) having a positive refractive power and a second lens (L2) having a positive refractive power, which are disposed in order from an object (O), and a contact multi-layer diffractive optical ele... | 03/20/2012 |
| 8072694 | Objective lens There is provided an objective lens used for a plurality of types of optical discs having a front surface and a rear surface, each of which includes an inner region and an outer region. The outer region has a surface shape which suppresses a coma caused when a beam ... | 12/06/2011 |
| 7920339 | Method and apparatus providing singlet wafer lens system with field flattener Methods and apparatus to correct a curved Petzval focusing surface to a plane using a convex lens, a concave lens, and a space arranged between the curved side of the convex lens and the curved side of the concave lens. The method and apparatus may also include a Fr... | 04/05/2011 |
| 7916404 | Fresnel lens with cavities An exemplary Fresnel lens includes a flat emitting surface and a plurality of annular Fresnel lens elements at an opposite side thereof to the emitting surface. Each of the Fresnel lens elements has a non-lens surface perpendicular to the emitting surface and a Fres... | 03/29/2011 |
| 7848033 | Optical concentrator Apparatus for concentrating light rays arriving from at least one opening onto a receiver, individual beams of the light rays each arriving at the apparatus substantially collimated, the apparatus including a respective Fresnel lens assembly for each opening, the Fr... | 12/07/2010 |
| 7813055 | Light receiver and Fresnel lens used therein A light receiver comprises a Fresnel lens for collecting light signals, and a light receiving element disposed closer to the Fresnel lens than the focal point of the Fresnel lens for receiving the light signals collected by the Fresnel lens. The Fresnel lens compris... | 10/12/2010 |
| 7800840 | Convex-fresnel LED lens and LED assembly thereof A convex-Fresnel LED lens and a LED assembly thereof are revealed. The lens is a Fresnel lens whose optical surface on a forward side thereof is a convex surface having draft with vertical shape so that the lens in the LED assembly concentrates light emitted from a ... | 09/21/2010 |
| 7746570 | Fresnel optical element and projection display apparatus Each of a plurality of Fresnel prisms 12 is formed so that a refractive surface 12 thereof includes a non-light incidence surface 12c upon which any light ray emitted from a projector 1 is not directly incident because it is interc... | 06/29/2010 |
| 7733580 | Light emitting module and light receiving module A plurality of first refraction surfaces 121 and a plurality of second refraction surfaces 122 are alternately provided on an emission surface of a lens element 120 so as to form concentric circles each having an optical axis 113 at the c... | 06/08/2010 |
| 7701648 | Fresnel lens When using an acrylic resin with a refractive index of 1.494, for example, the structure of the Fresnel lens is such that in a segment where a deviation angle of 19.5° or less is required, refraction-only prisms which do not cause any reflections are used, while in... | 04/20/2010 |
| 7684126 | Fresnel field lens Provided is a Fresnel lens for use with an array of semiconductor pixels that are separated by inactive areas, comprising a faceted surface with a plurality of facets for receiving an imaging beam, the facets being arranged into a plurality of zones separated by zon... | 03/23/2010 |
| 7599128 | Imaging lens An imaging lens is provided, whose lens characteristics can be switched between e.g. normal imaging and close-up imaging without requiring mechanically movable mechanism or attachment/removal of another lens. Switching of lens function is realized by combining a liq... | 10/06/2009 |
| 7589917 | Collimating fresnel lens with diffuser appearance A Fresnel lens having a curved surface and a large number of Fresnel lens steps with rectangular cross sections for enhancing the aesthetics while providing a diffuser appearance. The cylindrical Fresnel lens can be uniformly divided into rectangular sections across... | 09/15/2009 |
| 7580204 | Method for manufacturing lenses, in particular for an imager comprising a diaphragm A method for manufacturing a lens of a polymer material, includes producing in the core of the lens or on the surface of the latter at least one opaque zone having an optical function, by locally degrading the molecular structure of the polymer material using a beam... | 08/25/2009 |
| 7502178 | Multiple wavelength and multiple field of view imaging devices and methods An imaging device consistent with one of numerous embodiments has an opaque planar sheet with a plurality of pinholes defining a photon sieve in the sheet, wherein, the photon sieve comprises at least first and second regions. The first region exhibits a first focal... | 03/10/2009 |
| 7483220 | Optical arrangement with stepped lens The invention comprises an optical arrangement for illumination purposes, in particular for a stepped lens spotlight, comprising a stepped lens with a light-diffusing element, in particular a diffusing screen, in which the diffusing screen is arranged in a first reg... | 01/27/2009 |
| 7440186 | Screen, a fresnel lens sheet used for the screen, and an image display apparatus using the screen The present invention provides a technology suitable for shortening a depth of a image display apparatus while obtaining a picture of high quality. According to the invention, a total reflection prism portion is provided on a side of a Fresnel lens sheet toward a pi... | 10/21/2008 |
| 7433105 | Decorative film, carton, and method of making A film having a Fresnel lens is placed adjacent a design to create a three-dimensional image. The film can be used separately or laminated to a substrate to create enclosures such as cartons, dispensers, or containers. ... | 10/07/2008 |
| 7414787 | Phase contrast microscope for short wavelength radiation and imaging method A phase contrast x-ray microscope has a phase plate that is placed in proximity of and attached rigidly to the objective to form a composite optic. This enables easier initial and long-term maintenance of alignment of the microscope. In one example, they are fabrica... | 08/19/2008 |
| 7391580 | Ultra compact mono-bloc catadioptric imaging lens A mono-bloc catadioptric imaging lens comprising a solid body and a single-focal Maksutov type construction characterized by two refractive surfaces and two reflective surfaces wherein all surfaces are surfaces of revolution and wherein at least one surface is asphe... | 06/24/2008 |
| 7371590 | Integrated inspection system and defect correction method A system for the inspection of and a process for the correction of defects in a microreplicated optical display film manufacturing process. The process steps of manufacturing a master, a plurality of shims from the master, and a multiplicity of display films from ea... | 05/13/2008 |
| 7367140 | Method of drying molds and apparatus for supplying drying air In a method of drying molds or mold parts for the manufacture of optical lenses, in particular ophthalmic lenses and especially contact lenses, the mold or mold part to be dried is exposed to drying air. For this purpose, humid pressurized air (T) is used to which t... | 05/06/2008 |
| 7368655 | Textured transparent plate with high light transmission A textured transparent panel placed near an element capable of collecting or emitting light. The panel is textured on at least one of its faces by a plurality of geometrical features in relief, such as pyramids or cones. The panel, which may be made of glass, provid... | 05/06/2008 |
| 7365909 | Fabrication methods for micro compounds optics Methods for fabricating refractive element(s) and aligning the elements in a compound optic, typically to a zone plate element. The techniques are used for fabricating micro refractive, such as Fresnel, optics and compound optics including two or more optical elemen... | 04/29/2008 |
| 7365919 | Forming methods, forming devices for articles having a micro-sized shape and optical elements A article having a micro-sized shape being formed on the surface of the article by pressing a die onto the surface, wherein the elastic modulus of the article at room temperature is in the range of 1-4 GPa, the thickness of the article after forming is equal to 0.1 ... | 04/29/2008 |
| 7365918 | Fast x-ray lenses and fabrication method therefor A fabrication process for zone plate lenses is based on controlled thin layer deposition for fabricating structures as small as 2 nanometers (nm) in width, and potentially smaller. The substrate for deposition will take the form of a precision hole, fabricated in a ... | 04/29/2008 |
| 7362486 | Optical scanning device with at least one resin lens for controlling a beam waist position shift A first optical system guides a light beam from a light source to an optical deflector, and a second optical system converges the light beam deflected by the optical deflector on a surface to be scanned. The first optical system includes at least one resin lens havi... | 04/22/2008 |
| 7342728 | Fresnel lens, backprojection screen, and corresponding backprojection system and unit The invention relates to a Fresnel lens. Each refractive structure of the lens is bounded by two surfaces, the second surface making a second angle with the normal to the plane of incidence. At least two zones of refractive structures are provided in which the secon... | 03/11/2008 |
| 7339733 | Fresnel lens sheet and rear projection screen using it A Fresnel lens sheet which is bright due to a small light quantity loss, is restricted in speckles and ghosts, does not produce moires, and can be used in an inexpensive transmitting screen, wherein the sheet satisfies the diffusion characteristics of the following ... | 03/04/2008 |
| 7336516 | Unified multilevel memory systems and methods A Unified Memory may store multiple types of content such as data or fast code or slow code. The data or code may be stored in separate arrays or in a common array. In an array, a tag bit may indicate the type of content such as data or fast code or slow code or sin... | 02/26/2008 |
| 7330420 | Objective lens unit, optical pickup apparatus and optical information recording and reproducing apparatus An objective lens unit for use in an optical pickup apparatus, includes a first optical element arranged opposite to the optical information recording medium; a second optical element arranged at a light source side of the first optical element opposite to the first... | 02/12/2008 |
| 7317572 | Fresnel lens sheet, rear projection screen and rear projection display There is provided a Fresnel lens sheet for converging light rays fallen thereon from oblique directions, and capable of reducing the reflection of external light, of enabling displaying images in satisfactory contrast, of suppressing the occurrence of moiré and of ... | 01/08/2008 |
| 7311366 | Case for portable display devices A case for a portable display device can realize a large-sized screen by interconnecting a plurality of display elements, When the display elements are unfolded, the adjacent sides of the display elements closely contact each other, thereby minimizing the non-displa... | 12/25/2007 |
| 7310473 | Optical antenna and wireless optical system using the same A light concentrator for an optical antenna gradually narrows from the light receiving end to the end in contact with a light detector, and has a refractive index that gradually increases from the first to the second end, to afford a greater acceptance angle for the... | 12/18/2007 |
| 7309149 | Prism sheet, backlight assembly and liquid crystal display device having the same A prism sheet, a backlight assembly having the prism sheet, and an LCD device having the prism sheet, the prism sheet includes a first surface, a second surface and a reflecting member. A light is incident upon the first surface. The second surface includes a prism ... | 12/18/2007 |
| 7307107 | Photopolymerizable composition and use thereof A photopolymerizable composition comprising a polymerizable compound and a photopolymerization initiator, wherein the polymerizable compound is characterized by comprising (a) a bifunctional (meth)acrylic acid (thio)ester compound containing a sulfur atom in the mol... | 12/11/2007 |
| 7298533 | Optical films for creating unique optical effects An optical layer comprises a sheet of material having a surface. The surface comprises a plurality of optical elements. The optical elements are comprised of microscopic patterns in the surface that cooperate to produce an image. Each of the elements has a focal len... | 11/20/2007 |
| 7277227 | Fresnel lens sheet, transmission screen provided with the same and rear projection display A Fresnel lens sheet has an entrance surface (1a) and an exit surface (1b). A plurality of prisms (2) each having a refraction surface (3) and a total-reflection surface (4) are formed on the entrance surface (1 | 10/02/2007 |
