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Match Document Document Title
6987911 Multimode planar waveguide spectral filter  
A spectral filter comprises a planar optical waveguide having at least one set of diffractive elements. The waveguide confines in one transverse dimension an optical signal propagating in two other...
6987617 Diffracting optical element, and optical system and optical apparatus having the same  
A diffracting optical element has a structure that a plurality of layers having a periodic relief pattern varying in height in a period are laminated in proximity to or close contact with each...
6987615 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...
6987614 Optical pickup and optical disc drive device  
This invention is an optical pickup device having a composite optical element ( 32 ) which has a first diffraction grating ( 45 ) for splitting a light beam emitted from a light source ( 31 ) into...
6985656 Temperature-compensated planar waveguide optical apparatus  
An optical apparatus (spectral filter, temporal encoder, or other) comprises a planar optical waveguide having at least one set of diffractive elements. Each diffractive element set routes by...
6985293 Optical pickup using an optical phase plate and which is compatible with optical media for different types  
An optical pickup apparatus having laser light sources emit a first light beam having a relatively shorter wavelength for a DVD and a second light beam having a longer wavelength for a CD-R, an...
6975459 Micro-actuated adaptive diffractive composites  
A volume diffractive composite is disclosed for providing illumination at a first output angle. The volume diffractive composite comprises a first plurality of grating elements that are mutually...
6975458 Method and apparatus for transformation of a gaussian laser beam to a far field diffraction pattern  
A method and apparatus for converting a Gaussian laser beam into a propagating far field diffraction pattern using an off-axis diffractive optic. This propagating far field pattern is focused by a...
6974218 Retroflector  
A layer composite of plastic material forms a retroreflector and includes at least one transparent structure layer, a protective layer and a reflection layer enclosed at the common interface...
6972906 Space-variant subwavelength polarization grating and applications thereof  
An optical device includes a plurality of metallic stripes, arranged in a substantially planar, subwavelength grating having a laterally varying, continuous grating vector, deposited on a substrate...
6970412 Diffraction type lens which converges two wavelengths of light  
A diffraction type lens in an optical pickup apparatus for recording and reproducing two or more kinds of optical recording media is constituted by a substrate having one surface formed with a zone...
6970291 Projection aligner, aberration estimating mask pattern, aberration quantity estimating method, aberration eliminating filter and semiconductor manufacturing method  
A projection aligner of the present invention, in which ultraviolet light emitted from a lamp housing is split by a fly-eye lens into a large number of point light sources which are independent of...
6967777 Superposing diffraction optical element homogenizer optical system  
A DOE homogenizer including a plurality of parallel lasers emitting Gaussian beams of a diameter d along beam lines extending in a z-direction and aligning at a pitch p in an x-direction, and...
6965716 Amplitude and phase control in distributed optical structures  
A distributed optical structure comprises a set of diffractive elements. Individual diffractive element transfer functions collectively yield an overall transfer function between entrance and exit...
6965476 Diffractive optical element  
A diffractive optical element includes a first diffractive optical part having a phase type diffractive grating, and a second diffractive optical part having a phase type diffractive grating formed...
6965475 Optical component, optical device and optical communications system  
The present invention relates to an optical component and the like having a structure that can increase the absolute value of the angular dispersion, and also can reduce the temperature dependence...
6963450 Fresnel lens and die for the same  
Provided is a Fresnel lens the manufacture of that is unlikely to be affected by the working errors of the die in the optical axis and its neighborhood. Two lens surfaces 11, 11 that are disposed...
6956680 Network structure using high dispersion volume holography  
A grating structure by high dispersion volume holography that applies, for example, to pulse compression or stretching devices. The grating structure includes a transmission volume holographic...
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...
6947641 Apparatus for filtering optical radiation at an operating wavelength  
Apparatus for filtering optical radiation at an operating wavelength ( 19 ), which apparatus comprises a grating ( 1 ) written into a waveguide ( 2 ), and which grating ( 1 ) has a first end ( 3 ),...
6947215 Optical element, optical functional device, polarization conversion device, image display apparatus, and image display system  
Optical elements have a plurality of periodic structures in which each period is smaller than the wavelength of usable light. Embodiments are provided in which a desired phase difference can be...
6947214 Diffractive optical element and optical system having the same  
A diffractive optical element in which eclipse of rays at a grating side surface of a diffraction grating can be reduced is disclosed. In a diffractive optical element comprises a plurality of...
6947213 Diffractive optical element that polarizes light and an optical pickup using the same  
A first diffractive optical element pattern with a pattern pitch that is no greater than a wavelength of incident light is formed on a first main surface of substrate such as a glass plate. Second...
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...
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...
6937396 Hybrid lens with high numerical aperture  
A hybrid lens with a high numerical aperture is described. The hybrid lens comprises a refractive surface that refracts incident light and a diffractive surface that diffracts light exiting the...
6930833 Diffractive optical element, and optical system and optical apparatus provide with the same  
A layered diffractive optical element is disclosed, with which a high diffraction efficiency is attained over a broad region of used wavelengths, and with which diffraction light of unnecessary...
6930053 Method of forming grating microstructures by anodic oxidation  
A method of manufacturing an element having a microstructure of an excellent grating groove pattern or the like is obtained. This method of manufacturing an element having a microstructure...
6927915 Diffractive optical element, and optical system and optical apparatus provided with the same  
A diffractive optical element of the blazed-binary grating type is disclosed, with which a high diffraction efficiency can be achieved over substantially the entire used wavelength region. The...
6924934 Diffractive safety element  
A security element ( 2 ) comprising a plastic laminate ( 1 ) has a surface pattern which is composed mosaic-like at least from surface elements, wherein in the surface elements a reflecting...
6922287 Light coupling element  
A light coupling element is proposed with a surface ( 3 ) of a material which is transparent to light of a given wavelength (λ). In order for the light coupling element to act independently of the...
6917471 Diffraction grating element  
The present invention provides a diffraction grating element that allows the temperature control mechanism to be dispensed with or simplified. The diffraction grating element of the present...
6914723 Reflective lithography mask inspection tool based on achromatic Fresnel optics  
A mask blank inspection tool includes an AFO having a diffractive lens and a refractive lens formed on a common substrate. The diffractive lens is a Fresnel zone plate and the refractive lens is a...
6913871 Fabricating sub-resolution structures in planar lightwave devices  
Optical gratings are fabricated on a scale that may be smaller than the resolution of the lithographic system used to generate the grating pattern. Parallel ridges are formed using lithographic...
6909547 Security element with diffraction structures  
A security element ( 2 ) comprising a plastic laminate has a surface pattern ( 12 ) composed mosaic-like from surface elements ( 13; 14; 15 ). Shaped into at least two of the surface elements ( 14;...
6900939 Polarization insensitive beam splitting grating and apparatus using it  
A beam splitting element having a diffraction grating is designed by careful selection of device parameters such as grating period, duty cycle, depth and refractive index. In particular, the...
6897992 Illuminating optical unit in image display unit, and image display unit  
Disclosed is an illuminating optical unit in an image display unit for displaying an image by irradiating a GLV (spatial modulation device) with a laser beam and modulating the laser beam based on...
6894836 Diffraction grating, method of making and method of using  
A diffraction grating device operable as a reflection or transmission grating, and a method of manufacturing and using any number of such grating devices so that each device is individually...
6891677 Subwavelength optical microstructure light-redirecting films  
A waveguide for use in a back lighting device includes a moth-eye structured surface. A back lighting system includes a lighting device, a display panel, and a waveguide for redirecting light...
6891676 Tunable spectral filter  
An optical spectral filtering device and associated method for selectively directing a portion of a wavelength multiplexed input signal, entering through an optical fiber, into one or more output...
6891675 Optical device  
There is disclosed an optical device in which a first light source for outputting a first wavelength light is apart from a second light source for outputting a second wavelength light by a...
6891147 Wavelength-selective diffraction element and an optical head device  
An optical head device having an optical element capable of transmitting without diffracting light having a wavelength emitted from a two-wavelength semiconductor laser and capable of diffracting...
6888681 Optical demultiplexer  
Incident light rays ( 11 ) given from an optical fiber ( 10 ) are converted into parallel light rays ( 12 ) by a collimator lens ( 2 ). The parallel light rays ( 12 ) are demultiplexed in...
6885503 Achromatic fresnel optics based lithography for short wavelength electromagnetic radiations  
A lithography apparatus having achromatic Fresnel objective (AFO) that combines a Fresnel zone plate and a refractive Fresnel lens. The zone plate provides high resolution for imaging and focusing,...
6879441 Holographic spectral filter  
Method and apparatus are contemplated for receiving from an input, an optical signal in a volume hologram comprising a transfer function that may comprise temporal or spectral information, and...
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,...
6870678 Surface pattern  
A surface pattern ( 18 ) is in the form of a visually visible mosaic comprising a number of surface portions ( 8; 9; 15; 16; 17 ) and is embedded in a laminate ( 1 ) comprising at least a...
6859318 Method for forming a holographic spectral filter  
Method and apparatus are contemplated for receiving from an input, an optical signal in a volume hologram comprising a transfer function that may comprise temporal or spectral information, and...
6859317 Diffraction grating for wavelength division multiplexing/demultiplexing devices  
A diffraction grating for optical communication is disclosed. The diffraction grating includes a substrate and a reflective material adjacent the substrate, wherein one or more input optical...
6856461 Tunable optical filter  
A tunable optical device for adding or dropping one or more channels in a wavelength division multiplexing communication system is disclosed. The tunable optical device comprises one or more...
Matches 151 - 200 out of 744 < 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 >