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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...
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...
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...
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...
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 )...
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...
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 (...
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...
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,...
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...
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...
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...
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...
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...
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...
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...
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...
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,...
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...
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...
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...
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...
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...
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...
6751021 Optical scanning device  
The present invention provides a scanning device with the following features: the system is capable of writing data to record carriers of a first format because it is corrected for chromatic...
6741402 Objective lens for optical head  
A single element objective lens for an optical disc drive converges a laser beam, which is emitted by a laser source, on a data recording surface of an optical disc through a protective layer of...
6728036 Diffractive optical element and also optical arrangement comprising a diffractive optical element  
A diffractive optical element has a plurality of diffraction structures for a certain wavelength. These each have a width measured in the plane of the diffractive optical element and a height...
6704149 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...
6693744 Imaging element and image reading apparatus  
An imaging element includes a diffraction optical element on which an off-axis beam with a field angle is incident and a stop. Of beams having different field angles and incident on the diffraction...
6687056 Optical head  
A lens system includes a lens, a grating and a non-periodic phase structure. The lens system is a-thermalised by a compensation of the temperature-dependence of the spherical aberration of the lens...
6654184 Method for designing diffractive lens  
A method for designing a diffractive lens that separates an incident light beam into a plurality of beams and condenses the respective separated beams is provided. The method includes: defining an...
6641985 Method for making element  
A SiO 2 thin film is formed on a SiO 2 substrate provided with a binary-type diffractive element by a radiofrequency sputtering process so as to cover the fine irregularities formed on the...
6624943 Diffractive optical element and optical system having the same  
A diffractive optical element includes a plurality of laminated diffraction grating surfaces. Each of the diffraction grating surfaces is formed to have a sufficiently small grating thickness as...
6624942 Objective lens for optical pick-up  
An objective lens for an optical pick-up has a refractive lens element provided with a diffraction lens structure on at least one surface thereof. The diffraction lens structure has a plurality of...
6624941 Diffraction optical element  
A diffraction optical element is configured such that a plurality of annular zones having minute steps extending in a direction of the optical axis therebetween are formed on a base element. The...
6590708 Lens system having diffracting surface and refracting surface and optical apparatus using the lens system  
In a lens system having one or a plurality of diffracting surfaces and one or a plurality of refracting surfaces, a power of each surface and a distance between the surfaces are set such that an...
6563654 External pupil lens system  
An external pupil lens system ( 200 ) with an entrance pupil distance at least three times that of the effective focal length. The lens system is comprised of several conventional lenses and a...
6545808 Phase mask with spatially variable diffraction efficiency  
A phase mask ( 15 ) for modulating a collimated light beam passing therethrough, the light beam being diffracted to photoinduce a refractive index profile in a photosensitive optical medium, the...
6522465 Transmitting spectral filtering of high power extreme ultra-violet radiation  
In one embodiment of the invention, a transmitting spectral filter includes a thin film layer and a grating structure. The thin film layer is made of transmitting material to transmit a first...
6493126 Scanning lens and scanning optical system  
Disclosed is a scanning optical system, which is provided with a light source portion, a deflector, which deflects a beam emitted from said light source portion, and a scanning lens for converging...
6480333 Diffractive optical elements on non-flat substrates using electron beam lithography  
The present disclosure describes a technique for creating diffraction gratings on curved surfaces with electron beam lithography. The curved surface can act as an optical element to produce flat...
6473232 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...
6469827 Diffraction spectral filter for use in extreme-UV lithography condenser  
A condenser system for generating a beam of radiation includes a source of radiation light that generates a continuous spectrum of radiation light; a condenser comprising one or more first optical...
6462874 Optical systems employing stepped diffractive surfaces  
Optical systems employing stepped diffractive surfaces ( 13 ) are provided. Ray tracing through such systems is performed using the grating equation to represent the stepped diffractive surface...
6441962 Optical filter with little variation in chromatic dispersion  
An optical filter has little variation in chromatic dispersion over its passband, the filter being constituted by a Bragg grating whose pitch varies as a function of distance along the filter with...
6413702 Method for making a holographic linear position encoder  
A method for fabricating an error-free linear position encoder incorporates the generation of fringes on a holographic plate by the interference of light from two point sources. The fringes are...
6388811 Diffractive optical element including a diffractive grating pattern  
Disclosed is a diffractive optical element which includes a diffractive grating pattern on a base plate. The diffractive grating pattern includes a plurality of phase gratings arranged in parallel...
6384977 Fabricating optical waveguide gratings  
Method of fabricating an optical waveguide grating having a plurality of grating lines of refractive index variation including (i) repeatedly exposing a spatially periodic writing light pattern...
6351333 Optical element and optical system having the same  
An optical element includes an incidence surface, one or more reflecting surfaces reflecting light from the incident surface, an emergence surface, and off-axial curved surfaces causing the light...
6345133 Functional device based on focusing-concave gratings for multi-wavelength channel manipulation  
An optical device is described. In one embodiment, the optical device includes first and second concave diffraction gratings, first and second concentrators, first and second sets of fibers, and an...
Matches 1 - 50 out of 161 1 2 3 4 >