Did You Know...
...that when IBM conducted a market study of Chester Carlson's invention in 1959, the company concluded that it would take only 5000 units of his new product to saturate the market? IBM therefore declined to be part of the new product introduction. Too bad for IBM. Carlson's invention was the xerography process, and his new product was the beginning of the Xerox Corporation. It is estimated that every day, worldwide, 3,000,000,000 copies are made!!
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| Number | Title | Issue Date |
| 7738172 | Structures and methods for reducing aberration in optical systems An optical imaging system for producing an optical image includes one or more powered optical elements with polarization aberration that degrade said optical image; and a polarization rotation system configured to reduce the contributions of the polarization aberrat... | 06/15/2010 |
| 7656582 | Methods for reducing polarization aberration in optical systems An optical system includes multiple cubic crystalline optical elements and one or more uniaxial birefringent elements in which the crystal lattices of the cubic crystalline optical elements are oriented with respect to each other to reduce the effects of intrinsic b... | 02/02/2010 |
| 7453641 | Structures and methods for reducing aberration in optical systems An optical system includes at least one cubic crystalline optical element aligned along an optical axis, the at least one cubic crystalline optical element being birefringent and imparting retardance on a beam of light propagating through the optical system along th... | 11/18/2008 |
| 7413317 | Polarized UV exposure system A light exposure system is used to expose an alignment layer formed of anistropically absorbing molecules so as to allow alignment of subsequently applied liquid crystal polymer (LCP) molecules. The light incident on the alignment layer is polarized. When a single p... | 08/19/2008 |
| 7411656 | Optically polarizing retardation arrangement, and a microlithography projection exposure machine A retardation arrangement for converting an input radiation beam, incident from an input side of the retardation arrangement, into an output radiation beam which has over its cross section a spatial distribution of polarization states which can be influenced by the ... | 08/12/2008 |
| 7403267 | System and method for providing modified illumination intensity A system and method utilize a birefringence inducer to induce or change birefringence of an optical element to change an index of refraction within the optical element to produce a polarization-retarded light beam that passes through the optical element. The optical... | 07/22/2008 |
| 7382536 | Objective with fluoride crystal lenses An objective for a microlithography projection system has at least one fluoride crystal lens. The effects of birefringence, which are detrimental to the image quality, are reduced if the lens axis of the crystal lens is oriented substantially perpendicular to the {1... | 06/03/2008 |
| 7381339 | Increased yield of cubic crystalline optical elements by crystal orientation Increased yield of optical elements from cubic crystal rods, such as made of calcium fluoride, is made possible by orienting the optical elements for supporting the propagation of light along one of the , , or < 2 1 1> alternative crystal... | 06/03/2008 |
| 7366414 | Method and apparatus utilizing tunable differential group delay A method and apparatus for utilizing tunable differential group delay with at least a component of a fiber optic transmission system includes providing a tunable differential group delay system that is optically connected to a component of the fiber optic transmissi... | 04/29/2008 |
| 7359020 | Optical devices of substantially identical crossed sheet polarizer packages with compensator having biaxial plate Disclosed is an optical device comprising a polarizer package comprising an integrated combination of an absorbing layer and a compensator. Two of the identical polarizer packages can be crossed and used in a transmissive optical device. This polarizer package can a... | 04/15/2008 |
| 7339736 | Light polarizing film A light polarizing film and method of making same includes a linear polarizer having a first surface and a second surface and having a polarization direction, an optical retarder comprising a simultaneously biaxially oriented polypropylene film disposed adjacent to ... | 03/04/2008 |
| 7329006 | Projection system having low astigmatism Generally, the present invention relates to an apparatus for reducing astigmatism in a projection system that is particularly well suited to reducing astigmatism in LCD projection systems. A projection system includes a light source to generate light, conditioning o... | 02/12/2008 |
| 7327518 | Attenuator for high-power unpolarized laser beams A method for attenuating an unpolarized laser beam includes separating the laser beam into two plane-polarized beams. The plane-polarized beams are polarization rotated. Each of the polarization-rotated beams is separated into two plane-polarized portions. One of th... | 02/05/2008 |
| 7321465 | Method of optimizing an objective with fluoride crystal lenses, and objective with fluoride crystal lenses A numerical optimizing method serves to reduce harmful effects caused by intrinsic birefringence in lenses of a fluoride crystal material of cubic crystal structure in an objective, particularly a projection objective for a microlithography system. Under the optimiz... | 01/22/2008 |
| 7317512 | Different polarization in cross-section of a radiation beam in a lithographic apparatus and device manufacturing method A lithographic apparatus comprises an illumination system having optical elements capable of conditioning a radiation beam to comprise in cross-section a first portion of linearly polarized radiation and a second portion of unpolarized or circularly polarized radiat... | 01/08/2008 |
| 7301138 | Method and apparatus for dual polarization imaging An imaging system and method for dual polarization imaging is provided. In one implementation, an imaging system includes a field stop located at a first image plane for limiting an incident light ray bundle passing through an aperture thereof and a polarization dis... | 11/27/2007 |
| 7286288 | Method and system for flexible and cost effective dynamic tilt gain equalizer Method and system for flattening tilt gain with a digital title gain equalizer (“DTGE”) constructed with a linear tilt optical filter (“LTOF”). In a first embodiment, a DTGE flattens tilt gain with a combination of LTOF and a rotative half-wave plate. In a s... | 10/23/2007 |
| 7283302 | Wavelength filter and wavelength monitor device A wavelength filter includes a solid material that is optically transparent and including a pair of planar surfaces substantially parallel to each other; and a supporting member that supports the solid material on a planar surface of the solid material other than th... | 10/16/2007 |
| 7268944 | Optical interleaver, filter cell, and component design with reduced chromatic dispersion An optical interleaver for use in a range of telecommunications applications including optical multiplexers/demultiplexers and optical routers. The optical device includes an optical processing loop which allows multi-stage performance characteristics to be achieved... | 09/11/2007 |
| 7264852 | Liquid crystal panel and liquid crystal display apparatus A liquid crystal panel having improved contrast ratio in an oblique direction and good display evenness without causing shift or unevenness in retardation values due to shrinkage stress of a polarizer or heat of backlight is provided. A liquid crystal panel a... | 09/04/2007 |
| 7259914 | Attenuator for high-power unpolarized laser beams A method for attenuating an unpolarized laser beam includes separating the laser beam into two plane-polarized beams. The plane-polarized beams are polarization rotated. Each of the polarization-rotated beams is separated into two plane-polarized portions. One of th... | 08/21/2007 |
| 7252865 | Protective films containing compatible plasticizer compounds useful in polarizing plates for displays and their method of manufacture Polymer films comprising plasticizer compounds represented by Structure 1 as described in the specification are useful as protective films in polarizing plates for display applications. Methods of manufacturing such polymer films and polarizing plates are also discl... | 08/07/2007 |
| 7249847 | Eyeglass manufacturing method using variable index layer An eyeglass lens and manufacturing method using epoxy aberrator includes two lenses with a variable index material, such as epoxy, sandwiched in between. The epoxy is then cured to different indexes of refraction that provide precise corrections for the patient's wa... | 07/31/2007 |
| 7245436 | Illumination device and projector An illumination device includes a light source, a first lens array having a plurality of first small lenses, a second lens array having a plurality of second small lenses corresponding to the plurality of first small lenses, and a superimposing lens. The plurality o... | 07/17/2007 |
| 7242133 | Method for production of a mechanical resonator with a planar monolithic vibrating structure machined in a crystalline material and resonator produced thus The invention relates to the production of a mechanical resonator with a planar monolithic vibrating structure machine in a crystalline material. Where the material is trigonal (1), trigonal (2) or hexagonal in structure, said material is cut in the [001] plane or, ... | 07/10/2007 |
| 7239447 | Objective with crystal lenses An objective, in particular a projection objective for a microlithography projection-exposure installation, with at least one fluoride crystal lens is disclosed. A reduction in the detrimental influence of birefringence is achieved if this lens is a (100)-lens with ... | 07/03/2007 |
| 7239446 | Optical reduction system with control of illumination polarization An optical reduction system with polarization dose sensitive output for use in the photolithographic manufacture of semiconductor devices having variable compensation for reticle retardation before the long conjugate end. The variable compensation component(s) befor... | 07/03/2007 |
| 7227686 | Tunable PMD emulators and compensators Tunable PMD emulators and compensators for producing different PMD profiles with an adjustable average DGD value. ... | 06/05/2007 |
| 7223452 | Optical film, method for producing the same, and image display device using the same An optical film, which includes a laminate of a base and a birefringent layer, and which is excellent in adhesiveness between the base and the birefringent layer, is provided. The birefringent layer is formed on the base by: coating a material of the birefringent la... | 05/29/2007 |
| 7180667 | Objective with fluoride crystal lenses An objective for a microlithography projection system has at least one fluoride crystal lens. The effects of birefringence, which are detrimental to the image quality, are reduced if the lens axis of the crystal lens is oriented substantially perpendicular to the {1... | 02/20/2007 |
| 7169447 | Achromatic quarter wave film An achromatic quarter wave film (AQWF) comprising at least one quarter wave film (QWF) and at least one half wave film (HWF), each of said QWF and HWF comprising polymerized or vitrified anisotropic material, to methods and materials for the preparation of the AQWF,... | 01/30/2007 |
| 7170585 | Projection lens and microlithographic projection exposure apparatus A projection exposure apparatus for microlithography has a light source, an illumination system, a mask-positioning system and a projection lens. The latter has a system aperture plane and an image plane and contains at least one lens that is made of a material whic... | 01/30/2007 |
| 7165854 | Reflecting mirror and its fabrication method A reflecting mirror fabrication method, which includes the steps of (a) stamping a steel plate into a back panel, which has a rib-reinforced base, a rim extending around the rib-reinforced base, (b) installing nuts in the back side of the back panel for mounting, (c... | 01/23/2007 |
| 7165850 | Phase-compensated cube corner in laser interferometry A phase-compensating cube comer retroreflector includes three rear reflecting surfaces. All three rear reflecting surfaces can be coated with a phase-compensating film stack that induces 2nπ phase difference when handling polarized light. So coated, the phase-compe... | 01/23/2007 |
| 7163649 | Minimizing spatial-dispersion-induced birefringence A composition formed from Group II fluorides in which the composition has little or no intrinsic birefringence at a selected wavelength. The composition is a mixed solid solution of CaF2 with a second crystal of SrF2 or BaF2. The res... | 01/16/2007 |
| 7154669 | Method and system for correction of intrinsic birefringence in UV microlithography Systems and methods for improved correction of intrinsic birefringence are provided. Two pairs of optical elements correct for intrinsic birefringence of optical materials. A combination of design criteria for the set of optical elements, including refractive power ... | 12/26/2006 |
| 7154667 | Birefringent networks A birefringent network can be formed from a pair of beam directing elements that sandwich a birefringent filter. One of the beam director elements can be a polarizing beam splitter and the other of the beam director elements can be a reflector or polarizing beam spl... | 12/26/2006 |
| 7154573 | Electro-optical device and electronic apparatus including the same To provide an electro-optical device displaying high-contrast images in all directions due to the orthogonality of the polarization axes of the polarizers by improving the structure of the polarizers, and an electronic apparatus including the same. In an electro-opt... | 12/26/2006 |
| 7148946 | Optical device and liquid-crystal display apparatus An optical device including a laminate of cholesteric liquid-crystal layers in which the wavelength ranges of selective reflection of circularly polarized light beams are out of visible light region and which are combined so that circularly polarized light beams tra... | 12/12/2006 |
| 7145720 | Objective with fluoride crystal lenses An objective for a microlithography projection system has at least one fluoride crystal lens. The effects of birefringence, which are detrimental to the image quality, are reduced if the lens axis of the crystal lens is oriented substantially perpendicular to the {1... | 12/05/2006 |
