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7453643 |
Blazed diffractive optical element and projection objective for a microlithographic projection exposure apparatus
A diffractive optical element has a support and a plurality of diffraction structures. The latter are applied on the support and are binary blazed by being split into substructures so that the...
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7449679 |
System and method for manipulating and processing materials using holographic optical trapping
A method and apparatus for manipulating particles (micro, nano, and pico) having one or more characteristics with an optical trap formed by modulating a laser beam with a Diffractive Optical...
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7444049 |
Pulse stretcher and compressor including a multi-pass Bragg grating
A chirped pulse amplification (CPA) system and method is described wherein the pulse is stretched using multiple passes through a Bragg grating or compressed using multiple passes through a Bragg...
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7443587 |
DOE-based systems and devices for producing laser beams having modified beam characteristics
Novel methods are disclosed for designing and constructing miniature optical systems and devices employing light diffractive optical elements (DOEs) for modifying the size and shape of laser beams...
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7440188 |
Diffractive optical element
A conventional diffractive optical element (DOE), which consists of repetition of a unit pattern , has an advantage of applicability of the Fast Fourier Transform algorithm to calculate...
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7440174 |
Coherent fiber diffractive optical element beam combiner
An optical beam combiner and a related method for its operation, in which multiple coherent input beams are directed onto a diffractive optical element (DOE) along directions corresponding to...
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7433290 |
Complex objective lens, optical head, optical information apparatus, computer, optical disk player, car navigation system, optical disk recorder, and optical disk server
A complex objective lens composed of a hologram and an objective lens, capable of realizing stable and high-precision compatible reproducing/recording of a BD with a base thickness of about 0.1 mm...
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7433124 |
Illumination system to eliminate laser speckle and a single-panel projection system employing the same
An illumination system designed to eliminate laser speckle and a single-panel projection system employing the same. The illumination system includes a laser light source to sequentially emit a...
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7433123 |
Optical identification element having non-waveguide photosensitive substrate with diffraction grating therein
An optical identification element (also known herein as a microbead) that is made from pieces of an optical fiber or substrate that includes an inner core or region being surrounded by an outer...
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7430076 |
Diffraction element
A diffraction element having concave/convex-like diffraction gratings in its two surfaces from which at least two separated light beams can be taken in the same direction without changing largely...
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7428100 |
Wide-angle beam steering system
A beam steering system having first diffraction gratings, each one being associated with a corresponding one of a first plurality of grating vectors disposed substantially in a first plane. The...
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7420733 |
Electrically switchable polymer-dispersed liquid crystal materials including switchable optical couplers and reconfigurable optical interconnects
A new photopolymerizable material allows single-step, fast recording of volume holograms with properties that can be electrically controlled. Polymer-dispersed liquid crystals (PDLCs) in accordance...
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7418170 |
Optical device and virtual image display device
A virtual image display device is provided which displays a two-dimensional image for viewing a virtual image in a magnified form by a virtual optical system. The virtual image display device...
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7411181 |
System and method for manipulating and processing materials using holographic optical trapping
A method and apparatus for manipulating particles (micro, nano, and pico) having one or more characteristics with an optical trap formed by modulating a laser beam with a Diffractive Optical...
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7405879 |
Optically variable element having a variable distance-layer thickness
The invention concerns an optically variable element and a security product having such an optically variable element, a foil, in particular an embossing foil or a laminating foil having such an...
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7400449 |
System and method for reduction of image artifacts for laser projectors
A system and method is disclosed for reducing visibility of image artifacts caused by diffractive elements in a laser projector having a structured diffractive device. At least two diffracted...
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7388694 |
Method, program and system for image drawing
Laser information is prepared which indicates the irradiation interval and intensity level to be irradiated on an optical disc in advance. Then, when image drawing is indicated together with the...
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7387413 |
Lighting apparatus, lens and method of making the lens
In order to meet the legal requirements regarding color of light from a headlight, especially at the light-dark boundary and how much scattered light can occur in the dark region, a lens ( 5 ) is...
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7376305 |
Echelle gratings with low Polarization Dependent Loss (PDL) using metal coating on the reflecting facets only
An Echelle grating has alternate first ( 1 a ) and second ( 1 b ) sets of facets ( 1 ). The first set of facets ( 1 a ) is operative to reflect incident light ( 4 ) for diffraction and the second...
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7375890 |
Method of manufacturing of a diffraction grating-based optical identification element
A method of manufacturing optical identification elements that includes forming a diffraction grating in a fiber substrate along a longitudinal axis of the substrate. The grating includes a...
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7375868 |
Image scanning apparatus
An image scanning apparatus for realizing an image on a screen includes: a spatial light modulator module for diffracting light beams having different wavelengths into relevant modes; and an iris...
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7372607 |
Apparatus for reducing drops in a transmission spectrum due to inter-pixel gaps
The invention includes an apparatus for modulating an optical signal. The apparatus includes a spatial dispersion mechanism and a modulating mechanism. The spatial dispersion mechanism spatially...
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7359051 |
Multiple-wavelength spectroscopic apparatus
In a multi-wavelength spectroscopic apparatus using diffraction gratings, a first diffraction grating is a diffraction grating with diffraction efficiencies of p-polarized light and s-polarized...
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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...
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7339738 |
Nanomechanical near-field grating apparatus and acceleration sensor formed therefrom
A nanomechanical near-field grating device is disclosed which includes two sub-gratings vertically spaced by a distance less than or equal to an operating wavelength. Each sub-grating includes a...
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7339737 |
Beam multiplier that can be used as an exit-pupil expander and related system and method
A beam multiplier includes a beam-multiplying layer and an adjacent optical layer. The beam-multiplying layer is operable to generate output beamlets of light from an input beam of light, and the...
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7336420 |
Diffractive optical element, illumination system comprising the same, and method of manufacturing semiconductor device using illumination system
An illumination system including a diffractive optical element (DOE) having an uneven surface that produces an illumination shape. The DOE comprising an uneven surface that produces a multipole...
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7324282 |
Apparatus, system and method for applying optical gradient forces
The present invention relates to a system of applying optical gradient forces to form a plurality of optical traps to manipulate small particles. The system includes a light source for generating a...
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7313763 |
System for operating an astronomical observatory in real time using http
A system for operating an astronomical observatory made up of astronomical hardware, utilizing a web browser operated by a user, and a web server connected to the observatory, wherein both the...
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7307804 |
Thermally stabile GRISMs
Thermally stable GRISMs comprise a substrate and cover plate composed of a first material keeps the spatial frequency of the grating stable with temperature, and a prism composed of a second...
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7298540 |
Equalizing optical wavelength routers
A dynamic equalizing optical channel router includes an input port for receiving a wavelength division multiplexed composite optical signal comprising a plurality of channels; at least one output...
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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 )...
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7295357 |
Apparatus for handling minute object
An apparatus for handling a minute object such as a cell by using a holographic optical tweezers that comprises a laser light source 1 , holographic plate 3 having a specified pattern to form a...
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7294293 |
Method for manufacturing diffraction optical element
A method for manufacturing a diffraction optical element, according to the present invention, includes the steps of: supplying a photocurable resin onto a surface of a light-transmitting molding...
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7292393 |
Variable illuminator and speckle buster apparatus
Disclosed is an apparatus for illuminating a sample. In one embodiment, this apparatus includes a laser for outputting an incident laser beam towards a sample and a first diffractive element having...
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7286291 |
Show-through security packaging system for digital media
A system of visual authentication of digital media. A visual means is provided at the point of purchase for a user to verify that the source of software is genuine. An authentication image is...
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RE39865 |
Method of fabricating Bragg gratings using a silica glass phase grating mask and mask used by same
An index grating is imprinted in the core of an optical fiber using a specially designed silica glass phase grating mask. The phase mask is held in close proximity to the optical fiber. Laser...
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7277640 |
Optical add/drop multiplexing systems
The present invention overcomes problems associated with switch isolation, noise and crosstalk suppression, insertion loss, spurious reflections, wavelength tolerance, and compactness that are...
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7271956 |
Diffractive optical element
A diffractive optical element including a stack of first, second and third optical regions or a stack of first, second, third and fourth optical regions, a first relief pattern formed between the...
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7269315 |
Apparatus for writing Bragg gratings and reflection unit used in the apparatus
Provided is an apparatus for writing Bragg gratings and a reflection unit used in the same capable of readily adjusting an incident angle of light radiated from a light source, in order to write...
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7268947 |
Diffractive optical element and optical head using the same
A diffractive optical element emits substantially zero order diffracted light when light with a wavelength of 0.35 μm to 0.45 μm is incident and emits substantially first-order diffracted light...
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7262914 |
Method and apparatus for generating and detecting duality modulated electromagnetic radiation
A generator of duality modulated radiation, of which the irradiance, the wave intensity, or both, are varied from ordinarily equivalent levels, either for purposes of providing energy depleted or...
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7262913 |
Chromatic dispersion and dispersion slope compensating apparatus
In a chromatic dispersion and dispersion slope compensating apparatus according to the present invention, a WDM light which has been angularly dispersed to a first direction by a VIPA plate, is...
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7262898 |
Apparatus for reducing drops in a transmission spectrum due to inter-pixel gaps
The invention includes an apparatus for modulating an optical signal. The apparatus includes a modulating mechanism comprising a plurality of modulating component arrays, each modulating component...
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7256942 |
Single lens element, light source device and scanning optical device
A single lens element used for converting a divergent pencil of rays, radiated from a light source, into a predetermined convergent state, wherein
the single lens element is made from a...
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7256938 |
Method for making large scale multilayer dielectric diffraction gratings on thick substrates using reactive ion etching
Methods of fabricating large size, high performance multilayer diffraction gratings having a thick substrate that take advantage of reactive ion etching during the fabrication process are provided...
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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...
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7245432 |
Dual diffraction-grating device
A diffraction grating device ( 100 ) has both reflecting ( 108 ) and transmitting ( 106 ) gratings inter leaved to allow both transmission diffraction patterns and reflection diffraction patterns...
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7237940 |
Light guide plate with subwavelength grating and backlight module using the same
A light guide plate ( 30 ) has a light incident surface ( 305 ) for receiving light, a light emitting surface ( 301 ) for emitting light, a bottom surface ( 303 ) opposite to the light emitting...
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7236302 |
Diffraction optical element
In a diffraction optical element in which a plurality of diffraction gratings are laminated and the maximum difference of length among optical paths of light passing through the plurality of...
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